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 0.1.23-1cc990c [2018-09-30 23:19:37,854 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:19:37,856 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:19:37,869 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:19:37,869 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:19:37,870 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:19:37,872 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:19:37,873 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:19:37,875 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:19:37,876 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:19:37,877 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:19:37,921 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:19:37,949 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:19:37,949 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:19:37,950 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:19:37,950 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:19:37,951 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:19:37,951 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:19:37,951 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:19:37,951 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:19:37,952 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:19:37,952 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:19:37,952 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:19:37,952 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:19:37,952 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:19:37,953 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:19:37,953 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:19:37,953 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:19:37,953 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:19:37,953 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:19:37,954 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:19:37,954 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:19:37,954 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:19:37,954 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:19:37,954 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:19:37,954 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:19:37,955 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:19:37,955 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:19:37,955 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:19:37,955 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:19:37,955 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:19:37,956 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:19:37,998 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:19:38,010 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:19:38,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:19:38,015 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:19:38,016 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:19:38,016 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-30 23:19:38,017 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-30 23:19:38,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:19:38,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:19:38,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:19:38,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:19:38,066 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:19:38,086 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 30.09 11:19:38" (1/1) ... [2018-09-30 23:19:38,097 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 30.09 11:19:38" (1/1) ... [2018-09-30 23:19:38,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:19:38,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:19:38,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:19:38,105 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:19:38,115 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 30.09 11:19:38" (1/1) ... [2018-09-30 23:19:38,115 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 30.09 11:19:38" (1/1) ... [2018-09-30 23:19:38,116 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 30.09 11:19:38" (1/1) ... [2018-09-30 23:19:38,117 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 30.09 11:19:38" (1/1) ... [2018-09-30 23:19:38,120 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 30.09 11:19:38" (1/1) ... [2018-09-30 23:19:38,122 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 30.09 11:19:38" (1/1) ... [2018-09-30 23:19:38,123 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 30.09 11:19:38" (1/1) ... [2018-09-30 23:19:38,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:19:38,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:19:38,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:19:38,126 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:19:38,127 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 30.09 11:19:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:19:38,203 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 23:19:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:19:38,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:19:38,487 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:19:38,487 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:19:38 BoogieIcfgContainer [2018-09-30 23:19:38,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:19:38,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:19:38,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:19:38,492 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:19:38,493 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 30.09 11:19:38" (1/2) ... [2018-09-30 23:19:38,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2402dd7d and model type fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:19:38, skipping insertion in model container [2018-09-30 23:19:38,494 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 30.09 11:19:38" (2/2) ... [2018-09-30 23:19:38,496 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-30 23:19:38,506 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:19:38,514 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:19:38,561 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:19:38,562 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:19:38,562 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:19:38,562 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:19:38,562 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:19:38,563 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:19:38,563 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:19:38,563 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:19:38,563 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:19:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-30 23:19:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:19:38,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:38,583 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:38,584 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:38,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1807861163, now seen corresponding path program 1 times [2018-09-30 23:19:38,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:38,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:38,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:38,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:38,727 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:19:38,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:19:38,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:19:38,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:19:38,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:19:38,747 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-30 23:19:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:38,807 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-30 23:19:38,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:19:38,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-30 23:19:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:38,819 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:19:38,820 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:19:38,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:19:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:19:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:19:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:19:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-30 23:19:38,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-30 23:19:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:38,863 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-30 23:19:38,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:19:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-30 23:19:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:19:38,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:38,864 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:38,864 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:38,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:38,865 INFO L82 PathProgramCache]: Analyzing trace with hash 89245487, now seen corresponding path program 1 times [2018-09-30 23:19:38,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:38,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:38,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:38,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:38,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:38,999 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 [2018-09-30 23:19:39,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:39,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:39,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:39,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:19:39,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:19:39,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:19:39,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:19:39,093 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-30 23:19:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:39,131 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-30 23:19:39,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:19:39,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-30 23:19:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:39,135 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:19:39,136 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:19:39,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:19:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:19:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:19:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:19:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-30 23:19:39,143 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-30 23:19:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:39,143 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-30 23:19:39,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:19:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-30 23:19:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:19:39,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:39,145 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:39,145 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:39,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2061989811, now seen corresponding path program 2 times [2018-09-30 23:19:39,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:39,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:39,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:39,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:39,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:39,304 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:19:39,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:19:39,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:19:39,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:19:39,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:19:39,306 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-09-30 23:19:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:39,392 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-09-30 23:19:39,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:19:39,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-30 23:19:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:39,394 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:19:39,394 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:19:39,395 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 [2018-09-30 23:19:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:19:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2018-09-30 23:19:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:19:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-09-30 23:19:39,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2018-09-30 23:19:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:39,408 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-09-30 23:19:39,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:19:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-09-30 23:19:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:19:39,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:39,409 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:39,410 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:39,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:39,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2062049393, now seen corresponding path program 1 times [2018-09-30 23:19:39,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:39,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:39,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:39,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:39,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:19:39,461 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:19:39,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:19:39,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:19:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:19:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:19:39,463 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2018-09-30 23:19:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:39,584 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2018-09-30 23:19:39,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:19:39,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-09-30 23:19:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:39,586 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:19:39,586 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:19:39,586 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 [2018-09-30 23:19:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:19:39,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-09-30 23:19:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:19:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-30 23:19:39,593 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2018-09-30 23:19:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:39,593 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-30 23:19:39,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:19:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-30 23:19:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:19:39,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:39,595 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2018-09-30 23:19:39,595 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:39,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1980186676, now seen corresponding path program 1 times [2018-09-30 23:19:39,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:39,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:39,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:39,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:39,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:39,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:39,848 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 [2018-09-30 23:19:39,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:39,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:39,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:39,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:19:39,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:19:39,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:19:39,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:19:39,930 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2018-09-30 23:19:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:39,991 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-09-30 23:19:39,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:19:39,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-09-30 23:19:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:39,993 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:19:39,993 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:19:39,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:19:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:19:39,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:19:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:19:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-30 23:19:40,001 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-30 23:19:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:40,001 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-30 23:19:40,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:19:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-30 23:19:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:19:40,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:40,003 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:40,003 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:40,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:40,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1317950664, now seen corresponding path program 2 times [2018-09-30 23:19:40,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:40,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:40,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:40,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:40,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:40,106 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 [2018-09-30 23:19:40,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:40,148 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:40,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:40,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:40,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:40,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:19:40,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:19:40,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:19:40,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:19:40,183 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-09-30 23:19:40,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:40,280 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-09-30 23:19:40,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:19:40,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-09-30 23:19:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:40,281 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:19:40,281 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:19:40,282 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 [2018-09-30 23:19:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:19:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:19:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:19:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-30 23:19:40,288 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2018-09-30 23:19:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:40,289 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-30 23:19:40,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:19:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-30 23:19:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:19:40,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:40,290 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:40,290 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:40,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1142069956, now seen corresponding path program 3 times [2018-09-30 23:19:40,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:40,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:40,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:40,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:40,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:40,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:40,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:40,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 23:19:40,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:40,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:40,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:40,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:19:40,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:19:40,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:19:40,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:19:40,486 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-09-30 23:19:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:40,530 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-09-30 23:19:40,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:19:40,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-09-30 23:19:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:40,537 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:19:40,537 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:19:40,537 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 [2018-09-30 23:19:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:19:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:19:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:19:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-09-30 23:19:40,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-09-30 23:19:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:40,551 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-09-30 23:19:40,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:19:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-09-30 23:19:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:19:40,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:40,554 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:40,555 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:40,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:40,556 INFO L82 PathProgramCache]: Analyzing trace with hash -375565888, now seen corresponding path program 4 times [2018-09-30 23:19:40,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:40,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:40,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:40,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:40,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:40,772 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 [2018-09-30 23:19:40,788 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:40,815 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:40,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:40,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:40,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:40,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:19:40,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:19:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:19:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:19:40,851 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2018-09-30 23:19:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:40,959 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-30 23:19:40,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:19:40,960 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-30 23:19:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:40,961 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:19:40,961 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:19:40,962 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 [2018-09-30 23:19:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:19:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:19:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:19:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-30 23:19:40,967 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-30 23:19:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:40,968 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-30 23:19:40,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:19:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-30 23:19:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:19:40,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:40,969 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:40,969 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:40,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1465268668, now seen corresponding path program 5 times [2018-09-30 23:19:40,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:40,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:40,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:40,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:41,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:41,119 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 [2018-09-30 23:19:41,130 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:41,238 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:19:41,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:41,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:41,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:41,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:19:41,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:19:41,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:19:41,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:19:41,298 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-09-30 23:19:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:41,523 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-09-30 23:19:41,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:19:41,524 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-09-30 23:19:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:41,525 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:19:41,525 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:19:41,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:19:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:19:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:19:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:19:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 23:19:41,531 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2018-09-30 23:19:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:41,532 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 23:19:41,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:19:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 23:19:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:19:41,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:41,533 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:41,533 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:41,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:41,534 INFO L82 PathProgramCache]: Analyzing trace with hash 980751032, now seen corresponding path program 6 times [2018-09-30 23:19:41,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:41,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:41,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:41,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:41,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:41,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:41,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:41,717 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:41,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:19:41,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:41,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:41,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:41,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:19:41,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:19:41,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:19:41,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:19:41,899 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-09-30 23:19:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:42,064 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-09-30 23:19:42,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:19:42,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-09-30 23:19:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:42,067 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:19:42,068 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:19:42,069 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 [2018-09-30 23:19:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:19:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:19:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:19:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-09-30 23:19:42,074 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2018-09-30 23:19:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:42,075 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-09-30 23:19:42,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:19:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-09-30 23:19:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:19:42,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:42,076 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:42,077 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:42,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -784229196, now seen corresponding path program 7 times [2018-09-30 23:19:42,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:42,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:42,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:42,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:42,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:42,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:42,276 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 [2018-09-30 23:19:42,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:42,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:42,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:42,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:19:42,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:19:42,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:19:42,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:19:42,377 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2018-09-30 23:19:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:42,426 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-30 23:19:42,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:19:42,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-09-30 23:19:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:42,433 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:19:42,433 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:19:42,434 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 [2018-09-30 23:19:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:19:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:19:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:19:42,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-30 23:19:42,441 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2018-09-30 23:19:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:42,442 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-30 23:19:42,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:19:42,442 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-30 23:19:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:19:42,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:42,443 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:42,443 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:42,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:42,444 INFO L82 PathProgramCache]: Analyzing trace with hash -418146384, now seen corresponding path program 8 times [2018-09-30 23:19:42,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:42,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:42,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:42,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:42,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:42,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:42,691 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 [2018-09-30 23:19:42,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:42,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:42,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:42,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:42,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:42,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:19:42,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:19:42,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:19:42,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:19:42,780 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2018-09-30 23:19:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:43,045 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-09-30 23:19:43,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:19:43,046 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-09-30 23:19:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:43,046 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:19:43,046 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:19:43,047 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 [2018-09-30 23:19:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:19:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:19:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:19:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-30 23:19:43,057 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2018-09-30 23:19:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:43,057 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-30 23:19:43,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:19:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-30 23:19:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:19:43,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:43,059 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:43,059 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:43,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash -799882324, now seen corresponding path program 9 times [2018-09-30 23:19:43,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:43,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:43,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:43,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:43,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:43,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:43,293 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 [2018-09-30 23:19:43,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:43,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 23:19:43,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:43,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:43,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:43,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:19:43,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:19:43,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:19:43,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:19:43,396 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2018-09-30 23:19:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:43,460 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2018-09-30 23:19:43,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:19:43,462 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-09-30 23:19:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:43,463 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:19:43,463 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:19:43,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:19:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:19:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:19:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:19:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-09-30 23:19:43,469 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2018-09-30 23:19:43,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:43,470 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-09-30 23:19:43,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:19:43,470 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-09-30 23:19:43,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:19:43,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:43,471 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:43,471 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:43,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:43,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1719066792, now seen corresponding path program 10 times [2018-09-30 23:19:43,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:43,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:43,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:43,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:43,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:43,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:43,819 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 [2018-09-30 23:19:43,827 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:43,880 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:43,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:43,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:43,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:43,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:19:43,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:19:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:19:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:19:43,927 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2018-09-30 23:19:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:44,053 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-09-30 23:19:44,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:19:44,054 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-30 23:19:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:44,054 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:19:44,054 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:19:44,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:19:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:19:44,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:19:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:19:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-30 23:19:44,061 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-30 23:19:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:44,062 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-30 23:19:44,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:19:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-30 23:19:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:19:44,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:44,063 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:44,063 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:44,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:44,064 INFO L82 PathProgramCache]: Analyzing trace with hash 67612324, now seen corresponding path program 11 times [2018-09-30 23:19:44,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:44,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:44,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:44,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:44,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:44,234 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 [2018-09-30 23:19:44,246 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:44,280 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:19:44,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:44,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:44,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:44,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:19:44,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:19:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:19:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:19:44,327 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-30 23:19:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:44,389 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-09-30 23:19:44,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:19:44,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-30 23:19:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:44,390 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:19:44,390 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:19:44,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:19:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:19:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:19:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:19:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-30 23:19:44,398 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2018-09-30 23:19:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:44,398 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-30 23:19:44,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:19:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-30 23:19:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:19:44,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:44,400 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:44,400 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:44,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2137199200, now seen corresponding path program 12 times [2018-09-30 23:19:44,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:44,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:44,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:44,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:44,794 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 [2018-09-30 23:19:44,802 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:44,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 23:19:44,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:44,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:44,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:44,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:19:44,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:19:44,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:19:44,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:19:44,961 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2018-09-30 23:19:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:45,019 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-09-30 23:19:45,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:19:45,021 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-09-30 23:19:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:45,022 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:19:45,022 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:19:45,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:19:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:19:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:19:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:19:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-30 23:19:45,027 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2018-09-30 23:19:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:45,027 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-30 23:19:45,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:19:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-30 23:19:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:19:45,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:45,028 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:45,028 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:45,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash 752770460, now seen corresponding path program 13 times [2018-09-30 23:19:45,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:45,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:45,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:45,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:45,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:45,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:45,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:45,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:45,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:45,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:45,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:19:45,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:19:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:19:45,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:19:45,359 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2018-09-30 23:19:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:45,699 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2018-09-30 23:19:45,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:19:45,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-30 23:19:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:45,702 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:19:45,702 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:19:45,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:19:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:19:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:19:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:19:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-30 23:19:45,712 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-30 23:19:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:45,713 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-30 23:19:45,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:19:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-30 23:19:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:19:45,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:45,718 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:45,719 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:45,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash -830226792, now seen corresponding path program 14 times [2018-09-30 23:19:45,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:45,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:45,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:45,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:45,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:46,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:46,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:46,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:46,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:46,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:46,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:46,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:46,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:19:46,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:19:46,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:19:46,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:19:46,289 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2018-09-30 23:19:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:46,508 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-09-30 23:19:46,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:19:46,512 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-09-30 23:19:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:46,512 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:19:46,512 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:19:46,513 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 [2018-09-30 23:19:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:19:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:19:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:19:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-30 23:19:46,518 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2018-09-30 23:19:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:46,519 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-30 23:19:46,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:19:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-30 23:19:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:19:46,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:46,520 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:46,520 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:46,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:46,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1672163180, now seen corresponding path program 15 times [2018-09-30 23:19:46,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:46,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:46,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:46,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:46,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:47,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:47,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:47,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:47,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-30 23:19:47,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:47,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:47,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:47,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:19:47,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:19:47,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:19:47,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:19:47,390 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2018-09-30 23:19:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:47,483 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-09-30 23:19:47,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:19:47,483 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-09-30 23:19:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:47,484 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:19:47,484 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:19:47,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:19:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:19:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:19:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:19:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-30 23:19:47,491 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2018-09-30 23:19:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:47,491 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-30 23:19:47,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:19:47,491 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-30 23:19:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:19:47,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:47,492 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:47,492 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:47,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash 975786896, now seen corresponding path program 16 times [2018-09-30 23:19:47,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:47,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:47,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:47,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:47,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:48,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:48,019 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 [2018-09-30 23:19:48,027 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:48,067 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:48,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:48,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:48,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:48,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:19:48,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:19:48,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:19:48,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:19:48,114 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2018-09-30 23:19:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:48,173 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-30 23:19:48,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:19:48,174 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2018-09-30 23:19:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:48,175 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:19:48,175 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:19:48,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:19:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:19:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:19:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:19:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-09-30 23:19:48,180 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2018-09-30 23:19:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:48,181 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-09-30 23:19:48,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:19:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-09-30 23:19:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:19:48,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:48,182 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:48,182 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:48,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1259796596, now seen corresponding path program 17 times [2018-09-30 23:19:48,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:48,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:48,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:48,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:48,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:48,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:48,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:48,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:48,593 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:19:48,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:48,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:48,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:48,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:19:48,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:19:48,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:19:48,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:19:48,637 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2018-09-30 23:19:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:48,719 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-09-30 23:19:48,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:19:48,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-09-30 23:19:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:48,721 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:19:48,721 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:19:48,721 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 [2018-09-30 23:19:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:19:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:19:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:19:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-30 23:19:48,726 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2018-09-30 23:19:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:48,726 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-30 23:19:48,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:19:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-30 23:19:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:19:48,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:48,727 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:48,728 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:48,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:48,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2123082888, now seen corresponding path program 18 times [2018-09-30 23:19:48,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:48,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:48,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:48,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:48,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:49,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:49,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:49,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:49,253 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 23:19:49,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:49,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:49,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:49,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:19:49,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:19:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:19:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:19:49,299 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-30 23:19:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:49,420 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2018-09-30 23:19:49,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:19:49,420 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2018-09-30 23:19:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:49,421 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:19:49,421 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:19:49,421 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 [2018-09-30 23:19:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:19:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:19:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:19:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-09-30 23:19:49,426 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2018-09-30 23:19:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:49,426 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-09-30 23:19:49,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:19:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-09-30 23:19:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:19:49,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:49,427 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:49,427 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:49,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:49,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1780023940, now seen corresponding path program 19 times [2018-09-30 23:19:49,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:49,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:49,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:49,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:49,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:50,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:50,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:50,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:50,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:50,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:50,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:19:50,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:19:50,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:19:50,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:19:50,095 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2018-09-30 23:19:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:50,186 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2018-09-30 23:19:50,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:19:50,187 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2018-09-30 23:19:50,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:50,187 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:19:50,187 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:19:50,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:19:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:19:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:19:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:19:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-30 23:19:50,193 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-30 23:19:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:50,194 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-30 23:19:50,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:19:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-30 23:19:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:19:50,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:50,195 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:50,195 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:50,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:50,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1482110592, now seen corresponding path program 20 times [2018-09-30 23:19:50,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:50,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:50,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:50,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:50,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:50,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:50,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:50,723 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:50,770 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:50,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:50,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:50,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:50,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:19:50,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:19:50,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:19:50,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:19:50,815 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2018-09-30 23:19:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:50,892 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-30 23:19:50,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:19:50,893 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2018-09-30 23:19:50,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:50,893 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:19:50,893 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:19:50,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:19:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:19:50,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:19:50,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:19:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-30 23:19:50,898 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2018-09-30 23:19:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:50,898 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-30 23:19:50,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:19:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-30 23:19:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:19:50,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:50,899 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:50,899 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:50,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1067269764, now seen corresponding path program 21 times [2018-09-30 23:19:50,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:50,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:50,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:50,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:50,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:51,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:51,230 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 [2018-09-30 23:19:51,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:51,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-30 23:19:51,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:51,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:51,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:51,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:19:51,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:19:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:19:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:19:51,337 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2018-09-30 23:19:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:51,391 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2018-09-30 23:19:51,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:19:51,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2018-09-30 23:19:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:51,392 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:19:51,393 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:19:51,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:19:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:19:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:19:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:19:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-30 23:19:51,397 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2018-09-30 23:19:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:51,398 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-30 23:19:51,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:19:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-30 23:19:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:19:51,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:51,399 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:51,399 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:51,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:51,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192584, now seen corresponding path program 22 times [2018-09-30 23:19:51,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:51,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:51,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:51,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:51,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:52,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:52,375 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 [2018-09-30 23:19:52,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:52,434 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:52,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:52,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:52,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:52,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:19:52,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:19:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:19:52,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:19:52,479 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2018-09-30 23:19:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:52,564 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-09-30 23:19:52,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:19:52,565 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-30 23:19:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:52,566 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:19:52,566 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:19:52,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:19:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:19:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:19:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:19:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-30 23:19:52,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-30 23:19:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:52,570 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-30 23:19:52,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:19:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-30 23:19:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:19:52,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:52,571 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:52,571 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:52,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1296319604, now seen corresponding path program 23 times [2018-09-30 23:19:52,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:52,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:52,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:52,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:52,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:53,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:53,354 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 [2018-09-30 23:19:53,362 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:53,420 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:19:53,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:53,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:53,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:53,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:19:53,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:19:53,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:19:53,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:19:53,462 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2018-09-30 23:19:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:53,539 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-09-30 23:19:53,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:19:53,540 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2018-09-30 23:19:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:53,541 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:19:53,541 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:19:53,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:19:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:19:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:19:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:19:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-30 23:19:53,546 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2018-09-30 23:19:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:53,546 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-30 23:19:53,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:19:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-30 23:19:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:19:53,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:53,547 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:53,548 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:53,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:53,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1829457776, now seen corresponding path program 24 times [2018-09-30 23:19:53,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:53,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:53,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:53,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:53,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:54,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:54,239 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 [2018-09-30 23:19:54,245 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:54,302 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 23:19:54,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:54,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:54,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:54,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:19:54,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:19:54,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:19:54,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:19:54,338 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2018-09-30 23:19:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:54,435 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2018-09-30 23:19:54,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:19:54,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2018-09-30 23:19:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:54,436 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:19:54,436 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:19:54,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:19:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:19:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:19:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:19:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-09-30 23:19:54,443 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2018-09-30 23:19:54,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:54,444 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-09-30 23:19:54,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:19:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-09-30 23:19:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:19:54,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:54,445 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:54,445 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:54,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:54,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1220834452, now seen corresponding path program 25 times [2018-09-30 23:19:54,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:54,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:54,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:54,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:54,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:55,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:55,260 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 [2018-09-30 23:19:55,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:55,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:55,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:55,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:19:55,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:19:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:19:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:19:55,353 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2018-09-30 23:19:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:55,482 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-30 23:19:55,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:19:55,483 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2018-09-30 23:19:55,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:55,484 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:19:55,484 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:19:55,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:19:55,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:19:55,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:19:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:19:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-30 23:19:55,490 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2018-09-30 23:19:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:55,490 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-30 23:19:55,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:19:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-30 23:19:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:19:55,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:55,491 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:55,492 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:55,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:55,492 INFO L82 PathProgramCache]: Analyzing trace with hash 910997608, now seen corresponding path program 26 times [2018-09-30 23:19:55,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:55,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:55,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:55,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:55,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:56,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:56,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:56,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:56,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:56,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:56,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:56,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:56,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:19:56,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:19:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:19:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:19:56,321 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2018-09-30 23:19:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:56,379 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2018-09-30 23:19:56,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:19:56,380 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2018-09-30 23:19:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:56,381 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:19:56,381 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:19:56,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:19:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:19:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:19:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:19:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-30 23:19:56,387 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2018-09-30 23:19:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:56,387 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-30 23:19:56,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:19:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-30 23:19:56,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:19:56,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:56,388 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:56,388 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:56,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:56,388 INFO L82 PathProgramCache]: Analyzing trace with hash 902207076, now seen corresponding path program 27 times [2018-09-30 23:19:56,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:56,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:56,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:56,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:56,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:56,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:56,830 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 [2018-09-30 23:19:56,837 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:56,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-30 23:19:56,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:56,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:56,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:56,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:19:56,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:19:56,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:19:56,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:19:56,950 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2018-09-30 23:19:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:57,042 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-09-30 23:19:57,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:19:57,043 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-09-30 23:19:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:57,044 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:19:57,044 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:19:57,046 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 [2018-09-30 23:19:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:19:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:19:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:19:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-30 23:19:57,051 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2018-09-30 23:19:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:57,051 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-30 23:19:57,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:19:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-30 23:19:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:19:57,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:57,052 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:57,052 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:57,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1044440416, now seen corresponding path program 28 times [2018-09-30 23:19:57,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:57,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:57,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:57,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:57,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:57,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:57,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:57,547 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:57,592 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:57,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:57,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:57,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:57,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:19:57,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:19:57,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:19:57,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:19:57,628 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2018-09-30 23:19:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:57,740 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2018-09-30 23:19:57,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:19:57,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2018-09-30 23:19:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:57,741 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:19:57,741 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:19:57,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:19:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:19:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:19:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:19:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-30 23:19:57,746 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-30 23:19:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:57,746 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-30 23:19:57,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:19:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-30 23:19:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:19:57,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:57,747 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:57,747 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:57,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:57,748 INFO L82 PathProgramCache]: Analyzing trace with hash 291726684, now seen corresponding path program 29 times [2018-09-30 23:19:57,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:57,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:57,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:57,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:57,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:58,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:58,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:58,482 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:58,546 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:19:58,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:58,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:58,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:58,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:19:58,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:19:58,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:19:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:19:58,586 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2018-09-30 23:19:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:58,674 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2018-09-30 23:19:58,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:19:58,674 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2018-09-30 23:19:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:58,675 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:19:58,675 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:19:58,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:19:58,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:19:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:19:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:19:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-30 23:19:58,682 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2018-09-30 23:19:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:58,682 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-30 23:19:58,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:19:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-30 23:19:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:19:58,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:58,683 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:58,683 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:58,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:58,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1511664040, now seen corresponding path program 30 times [2018-09-30 23:19:58,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:58,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:58,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:58,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:58,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:59,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:59,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:59,303 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:59,378 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-30 23:19:59,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:59,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:19:59,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:59,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:19:59,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:19:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:19:59,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:19:59,418 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2018-09-30 23:19:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:59,502 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2018-09-30 23:19:59,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:19:59,503 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-09-30 23:19:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:59,504 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:19:59,504 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:19:59,505 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 [2018-09-30 23:19:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:19:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:19:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:19:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-30 23:19:59,508 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2018-09-30 23:19:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:59,508 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-30 23:19:59,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:19:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-30 23:19:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:19:59,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:59,509 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:59,509 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:59,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:59,509 INFO L82 PathProgramCache]: Analyzing trace with hash 596637780, now seen corresponding path program 31 times [2018-09-30 23:19:59,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:59,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:59,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:59,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:59,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:00,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:00,305 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 [2018-09-30 23:20:00,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:00,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:00,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:00,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:20:00,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:20:00,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:20:00,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:20:00,415 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2018-09-30 23:20:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:00,519 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2018-09-30 23:20:00,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:20:00,528 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2018-09-30 23:20:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:00,528 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:20:00,528 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:20:00,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:20:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:20:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:20:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:20:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-30 23:20:00,534 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-30 23:20:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:00,534 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-30 23:20:00,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:20:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-30 23:20:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:20:00,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:00,535 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:00,535 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:00,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:00,536 INFO L82 PathProgramCache]: Analyzing trace with hash -549876912, now seen corresponding path program 32 times [2018-09-30 23:20:00,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:00,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:00,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:00,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:01,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:01,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:01,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:01,154 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:01,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:01,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:01,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:01,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:20:01,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:20:01,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:20:01,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:20:01,192 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2018-09-30 23:20:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:01,354 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2018-09-30 23:20:01,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:20:01,354 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2018-09-30 23:20:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:01,355 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:20:01,356 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:20:01,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:20:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:20:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:20:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:20:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-30 23:20:01,362 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2018-09-30 23:20:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:01,363 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-30 23:20:01,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:20:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-30 23:20:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:20:01,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:01,364 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:01,364 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:01,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:01,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1456099148, now seen corresponding path program 33 times [2018-09-30 23:20:01,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:01,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:01,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:01,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:01,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:02,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:02,193 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 [2018-09-30 23:20:02,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:02,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-30 23:20:02,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:02,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:02,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:02,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:20:02,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:20:02,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:20:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:20:02,324 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2018-09-30 23:20:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:02,434 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-09-30 23:20:02,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:20:02,435 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2018-09-30 23:20:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:02,436 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:20:02,436 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:20:02,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:20:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:20:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:20:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:20:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-30 23:20:02,443 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2018-09-30 23:20:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:02,443 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-30 23:20:02,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:20:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-30 23:20:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:20:02,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:02,444 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:02,444 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:02,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash 758776904, now seen corresponding path program 34 times [2018-09-30 23:20:02,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:02,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:02,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:02,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:02,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:03,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:03,023 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 [2018-09-30 23:20:03,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:03,082 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:03,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:03,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:03,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:03,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:20:03,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:20:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:20:03,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:20:03,123 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2018-09-30 23:20:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:03,258 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-30 23:20:03,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:20:03,259 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2018-09-30 23:20:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:03,260 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:20:03,260 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:20:03,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:20:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:20:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:20:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:20:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2018-09-30 23:20:03,266 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2018-09-30 23:20:03,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:03,267 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2018-09-30 23:20:03,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:20:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2018-09-30 23:20:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:20:03,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:03,268 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:03,268 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:03,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:03,268 INFO L82 PathProgramCache]: Analyzing trace with hash 646998596, now seen corresponding path program 35 times [2018-09-30 23:20:03,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:03,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:03,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:03,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:03,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:03,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:03,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:03,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:04,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:20:04,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:04,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:04,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:04,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:20:04,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:20:04,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:20:04,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:20:04,143 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2018-09-30 23:20:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:05,202 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2018-09-30 23:20:05,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:20:05,202 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2018-09-30 23:20:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:05,203 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:20:05,203 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:20:05,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:20:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:20:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:20:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:20:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 23:20:05,212 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2018-09-30 23:20:05,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:05,212 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 23:20:05,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:20:05,212 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 23:20:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:20:05,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:05,213 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:05,213 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:05,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:05,214 INFO L82 PathProgramCache]: Analyzing trace with hash 602227008, now seen corresponding path program 36 times [2018-09-30 23:20:05,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:05,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:05,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:05,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:05,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:05,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:05,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:05,918 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:06,004 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 23:20:06,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:06,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:06,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:06,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:20:06,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:20:06,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:20:06,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:20:06,051 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states. [2018-09-30 23:20:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:06,126 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-09-30 23:20:06,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:20:06,126 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2018-09-30 23:20:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:06,127 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:20:06,127 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:20:06,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:20:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:20:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:20:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:20:06,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2018-09-30 23:20:06,134 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2018-09-30 23:20:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:06,134 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2018-09-30 23:20:06,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:20:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2018-09-30 23:20:06,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:20:06,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:06,135 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:06,135 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:06,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:06,136 INFO L82 PathProgramCache]: Analyzing trace with hash 526403900, now seen corresponding path program 37 times [2018-09-30 23:20:06,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:06,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:06,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:06,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:06,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:07,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:07,424 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 [2018-09-30 23:20:07,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:07,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:07,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:07,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:20:07,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:20:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:20:07,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:20:07,537 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2018-09-30 23:20:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:07,604 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-09-30 23:20:07,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:20:07,605 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2018-09-30 23:20:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:07,606 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:20:07,606 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:20:07,607 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 [2018-09-30 23:20:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:20:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:20:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:20:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-30 23:20:07,613 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-30 23:20:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:07,614 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-30 23:20:07,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:20:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-30 23:20:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:20:07,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:07,614 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:07,614 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:07,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:07,615 INFO L82 PathProgramCache]: Analyzing trace with hash 674841144, now seen corresponding path program 38 times [2018-09-30 23:20:07,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:07,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:07,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:07,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:07,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:08,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:08,375 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 [2018-09-30 23:20:08,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:08,446 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:08,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:08,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:08,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:08,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:20:08,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:20:08,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:20:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:20:08,497 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 42 states. [2018-09-30 23:20:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:08,604 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2018-09-30 23:20:08,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:20:08,605 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2018-09-30 23:20:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:08,606 INFO L225 Difference]: With dead ends: 111 [2018-09-30 23:20:08,606 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:20:08,606 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 [2018-09-30 23:20:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:20:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:20:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:20:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-30 23:20:08,612 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2018-09-30 23:20:08,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:08,612 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-30 23:20:08,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:20:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-30 23:20:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:20:08,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:08,613 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:08,614 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:08,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1589111860, now seen corresponding path program 39 times [2018-09-30 23:20:08,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:08,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:08,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:08,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:08,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:09,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:09,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:09,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:09,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-30 23:20:09,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:09,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:09,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:09,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:20:09,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:20:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:20:09,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:20:09,727 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2018-09-30 23:20:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:09,871 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2018-09-30 23:20:09,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:20:09,872 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2018-09-30 23:20:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:09,873 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:20:09,873 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:20:09,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:20:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:20:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:20:09,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:20:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2018-09-30 23:20:09,882 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2018-09-30 23:20:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:09,882 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2018-09-30 23:20:09,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:20:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2018-09-30 23:20:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:20:09,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:09,883 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:09,884 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:09,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:09,884 INFO L82 PathProgramCache]: Analyzing trace with hash -265025744, now seen corresponding path program 40 times [2018-09-30 23:20:09,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:09,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:09,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:09,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:09,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:10,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:10,899 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 [2018-09-30 23:20:10,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:10,967 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:10,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:10,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:11,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:11,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:20:11,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:20:11,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:20:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:20:11,025 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2018-09-30 23:20:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:12,364 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2018-09-30 23:20:12,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:20:12,364 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2018-09-30 23:20:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:12,365 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:20:12,365 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:20:12,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:20:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:20:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:20:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:20:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 23:20:12,371 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-30 23:20:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:12,372 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 23:20:12,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:20:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 23:20:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:20:12,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:12,373 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:12,373 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:12,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:12,373 INFO L82 PathProgramCache]: Analyzing trace with hash 320164652, now seen corresponding path program 41 times [2018-09-30 23:20:12,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:12,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:12,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:12,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:12,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:13,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:13,676 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 [2018-09-30 23:20:13,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:13,781 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 23:20:13,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:13,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:13,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:13,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:20:13,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:20:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:20:13,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:20:13,830 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 45 states. [2018-09-30 23:20:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:14,213 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2018-09-30 23:20:14,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:20:14,213 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2018-09-30 23:20:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:14,214 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:20:14,214 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:20:14,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:20:14,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:20:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:20:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:20:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-30 23:20:14,223 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2018-09-30 23:20:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:14,223 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-30 23:20:14,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:20:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-30 23:20:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:20:14,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:14,224 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:14,224 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:14,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 47419432, now seen corresponding path program 42 times [2018-09-30 23:20:14,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:14,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:14,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:14,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:14,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:15,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:15,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:15,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:15,308 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-30 23:20:15,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:15,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:15,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:15,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:20:15,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:20:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:20:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:20:15,349 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2018-09-30 23:20:15,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:15,449 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2018-09-30 23:20:15,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:20:15,453 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2018-09-30 23:20:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:15,454 INFO L225 Difference]: With dead ends: 119 [2018-09-30 23:20:15,454 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:20:15,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:20:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:20:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:20:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:20:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-30 23:20:15,459 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2018-09-30 23:20:15,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:15,460 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-30 23:20:15,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:20:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-30 23:20:15,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:20:15,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:15,461 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:15,461 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:15,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:15,461 INFO L82 PathProgramCache]: Analyzing trace with hash -67731932, now seen corresponding path program 43 times [2018-09-30 23:20:15,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:15,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:15,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:15,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:15,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:16,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:16,865 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 [2018-09-30 23:20:16,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:16,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:16,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:16,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:20:16,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:20:16,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:20:16,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:20:16,992 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-30 23:20:17,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:17,488 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-30 23:20:17,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:20:17,489 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-30 23:20:17,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:17,489 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:20:17,490 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:20:17,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:20:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:20:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:20:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:20:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2018-09-30 23:20:17,497 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2018-09-30 23:20:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:17,498 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2018-09-30 23:20:17,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:20:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2018-09-30 23:20:17,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:20:17,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:17,499 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:17,499 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:17,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:17,499 INFO L82 PathProgramCache]: Analyzing trace with hash 940956960, now seen corresponding path program 44 times [2018-09-30 23:20:17,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:17,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:17,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:17,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:17,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:18,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:18,755 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 [2018-09-30 23:20:18,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:18,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:18,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:18,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:18,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:18,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:20:18,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:20:18,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:20:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:20:18,887 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 48 states. [2018-09-30 23:20:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:19,035 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2018-09-30 23:20:19,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:20:19,035 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2018-09-30 23:20:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:19,037 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:20:19,037 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:20:19,037 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 [2018-09-30 23:20:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:20:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:20:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:20:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-30 23:20:19,044 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2018-09-30 23:20:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:19,045 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-30 23:20:19,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:20:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-30 23:20:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:20:19,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:19,046 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:19,046 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:19,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:19,046 INFO L82 PathProgramCache]: Analyzing trace with hash -371626724, now seen corresponding path program 45 times [2018-09-30 23:20:19,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:19,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:19,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:19,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:19,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:20,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:20,057 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 [2018-09-30 23:20:20,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:20,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-30 23:20:20,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:20,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:20,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:20,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:20:20,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:20:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:20:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:20:20,223 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 49 states. [2018-09-30 23:20:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:20,330 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2018-09-30 23:20:20,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:20:20,330 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2018-09-30 23:20:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:20,332 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:20:20,332 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:20:20,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:20:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:20:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:20:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:20:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-30 23:20:20,339 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2018-09-30 23:20:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:20,339 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-30 23:20:20,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:20:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-30 23:20:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:20:20,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:20,340 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:20,341 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:20,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:20,341 INFO L82 PathProgramCache]: Analyzing trace with hash 955837976, now seen corresponding path program 46 times [2018-09-30 23:20:20,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:20,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:20,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:20,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:20,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:21,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:21,530 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 [2018-09-30 23:20:21,537 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:21,624 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:21,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:21,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:21,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:21,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:20:21,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:20:21,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:20:21,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:20:21,679 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 50 states. [2018-09-30 23:20:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:21,805 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2018-09-30 23:20:21,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:20:21,806 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2018-09-30 23:20:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:21,807 INFO L225 Difference]: With dead ends: 127 [2018-09-30 23:20:21,807 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:20:21,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:20:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:20:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:20:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:20:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-30 23:20:21,814 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-30 23:20:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:21,814 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-30 23:20:21,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:20:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-30 23:20:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:20:21,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:21,815 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:21,815 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:21,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:21,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1044127764, now seen corresponding path program 47 times [2018-09-30 23:20:21,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:21,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:21,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:21,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:21,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:23,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:23,523 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 [2018-09-30 23:20:23,529 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:23,652 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 23:20:23,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:23,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:23,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:23,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:20:23,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:20:23,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:20:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:20:23,709 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 51 states. [2018-09-30 23:20:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:23,965 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2018-09-30 23:20:23,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:20:23,967 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2018-09-30 23:20:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:23,968 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:20:23,968 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:20:23,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:20:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:20:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:20:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:20:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 23:20:23,974 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2018-09-30 23:20:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:23,974 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 23:20:23,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:20:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 23:20:23,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:20:23,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:23,975 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:23,975 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:23,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash -8731888, now seen corresponding path program 48 times [2018-09-30 23:20:23,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:23,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:23,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:23,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:23,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:25,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:25,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:25,531 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:25,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-30 23:20:25,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:25,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:25,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:25,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:20:25,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:20:25,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:20:25,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:20:25,694 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 52 states. [2018-09-30 23:20:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:25,868 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2018-09-30 23:20:25,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:20:25,869 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2018-09-30 23:20:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:25,870 INFO L225 Difference]: With dead ends: 131 [2018-09-30 23:20:25,870 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:20:25,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:20:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:20:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:20:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:20:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2018-09-30 23:20:25,876 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2018-09-30 23:20:25,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:25,876 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2018-09-30 23:20:25,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:20:25,877 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2018-09-30 23:20:25,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:20:25,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:25,877 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:25,877 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:25,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:25,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1805424396, now seen corresponding path program 49 times [2018-09-30 23:20:25,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:25,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:25,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:25,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:25,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:26,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:26,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:26,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:27,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:27,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:27,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:20:27,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:20:27,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:20:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:20:27,134 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 53 states. [2018-09-30 23:20:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:27,441 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2018-09-30 23:20:27,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:20:27,442 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2018-09-30 23:20:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:27,443 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:20:27,443 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:20:27,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:20:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:20:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:20:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:20:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-30 23:20:27,450 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-30 23:20:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:27,450 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-30 23:20:27,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:20:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-30 23:20:27,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:20:27,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:27,451 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:27,452 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:27,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:27,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1452891144, now seen corresponding path program 50 times [2018-09-30 23:20:27,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:27,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:27,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:27,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:27,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:28,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:28,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:28,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:28,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:28,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:28,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:28,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:28,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:20:28,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:20:28,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:20:28,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:20:28,839 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 54 states. [2018-09-30 23:20:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:29,114 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-30 23:20:29,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:20:29,114 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2018-09-30 23:20:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:29,115 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:20:29,115 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:20:29,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:20:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:20:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:20:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:20:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-30 23:20:29,121 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2018-09-30 23:20:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:29,122 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-30 23:20:29,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:20:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-30 23:20:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:20:29,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:29,123 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:29,123 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:29,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:29,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1970852356, now seen corresponding path program 51 times [2018-09-30 23:20:29,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:29,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:29,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:29,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:29,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:30,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:30,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:30,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:30,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-30 23:20:30,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:30,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:30,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:30,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:20:30,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:20:30,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:20:30,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:20:30,522 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 55 states. [2018-09-30 23:20:31,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:31,421 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2018-09-30 23:20:31,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:20:31,421 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2018-09-30 23:20:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:31,422 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:20:31,422 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:20:31,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:20:31,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:20:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:20:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:20:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2018-09-30 23:20:31,429 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2018-09-30 23:20:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:31,429 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2018-09-30 23:20:31,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:20:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2018-09-30 23:20:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:20:31,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:31,430 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:31,430 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:31,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:31,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1515370752, now seen corresponding path program 52 times [2018-09-30 23:20:31,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:31,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:31,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:31,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:31,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:32,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:32,896 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 [2018-09-30 23:20:32,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:32,981 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:32,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:32,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:33,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:33,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:20:33,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:20:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:20:33,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:20:33,043 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 56 states. [2018-09-30 23:20:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:33,138 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-30 23:20:33,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:20:33,138 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2018-09-30 23:20:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:33,139 INFO L225 Difference]: With dead ends: 139 [2018-09-30 23:20:33,139 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 23:20:33,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:20:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 23:20:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 23:20:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:20:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-30 23:20:33,146 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2018-09-30 23:20:33,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:33,146 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-30 23:20:33,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:20:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-30 23:20:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 23:20:33,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:33,147 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:33,147 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:33,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1884213500, now seen corresponding path program 53 times [2018-09-30 23:20:33,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:33,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:33,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:33,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:33,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:34,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:34,476 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 [2018-09-30 23:20:34,490 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:34,706 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 23:20:34,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:34,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:34,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:34,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:20:34,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:20:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:20:34,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:20:34,753 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 57 states. [2018-09-30 23:20:34,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:34,941 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2018-09-30 23:20:34,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:20:34,948 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2018-09-30 23:20:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:34,948 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:20:34,949 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:20:34,949 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 [2018-09-30 23:20:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:20:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 23:20:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:20:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-30 23:20:34,955 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2018-09-30 23:20:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:34,955 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-30 23:20:34,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:20:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-30 23:20:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:20:34,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:34,956 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:34,956 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:34,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash -140191240, now seen corresponding path program 54 times [2018-09-30 23:20:34,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:34,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:34,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:34,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:34,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:36,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:36,253 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 [2018-09-30 23:20:36,261 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:36,405 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-30 23:20:36,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:36,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:36,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:36,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:20:36,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:20:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:20:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:20:36,467 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 58 states. [2018-09-30 23:20:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:36,698 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2018-09-30 23:20:36,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:20:36,699 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2018-09-30 23:20:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:36,700 INFO L225 Difference]: With dead ends: 143 [2018-09-30 23:20:36,700 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 23:20:36,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:20:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 23:20:36,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 23:20:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:20:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-09-30 23:20:36,706 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2018-09-30 23:20:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:36,706 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-09-30 23:20:36,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:20:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-09-30 23:20:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:20:36,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:36,706 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:36,707 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:36,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:36,707 INFO L82 PathProgramCache]: Analyzing trace with hash 27038708, now seen corresponding path program 55 times [2018-09-30 23:20:36,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:36,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:36,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:36,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:36,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:38,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:38,276 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 [2018-09-30 23:20:38,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:38,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:38,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:38,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:20:38,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:20:38,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:20:38,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:20:38,435 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-09-30 23:20:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:38,593 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2018-09-30 23:20:38,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:20:38,594 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-09-30 23:20:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:38,595 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:20:38,595 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:20:38,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:20:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:20:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:20:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:20:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-30 23:20:38,602 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-30 23:20:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:38,602 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-30 23:20:38,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:20:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-30 23:20:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:20:38,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:38,603 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:38,604 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:38,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:38,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1821228784, now seen corresponding path program 56 times [2018-09-30 23:20:38,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:38,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:38,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:38,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:40,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:40,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:40,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:40,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:40,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:40,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:40,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:40,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:20:40,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:20:40,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:20:40,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:20:40,168 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 60 states. [2018-09-30 23:20:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:40,483 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2018-09-30 23:20:40,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:20:40,484 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 130 [2018-09-30 23:20:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:40,484 INFO L225 Difference]: With dead ends: 147 [2018-09-30 23:20:40,485 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:20:40,485 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 [2018-09-30 23:20:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:20:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:20:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:20:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-30 23:20:40,490 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 130 [2018-09-30 23:20:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:40,491 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-30 23:20:40,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:20:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-30 23:20:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:20:40,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:40,492 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:40,492 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:40,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:40,492 INFO L82 PathProgramCache]: Analyzing trace with hash -538961172, now seen corresponding path program 57 times [2018-09-30 23:20:40,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:40,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:40,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:40,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:41,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:41,832 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 [2018-09-30 23:20:41,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:41,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-30 23:20:41,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:42,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:42,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:42,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:20:42,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:20:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:20:42,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:20:42,044 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 61 states. [2018-09-30 23:20:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:42,170 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2018-09-30 23:20:42,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:20:42,170 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 132 [2018-09-30 23:20:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:42,171 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:20:42,171 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:20:42,172 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 [2018-09-30 23:20:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:20:42,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 23:20:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:20:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-30 23:20:42,177 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 132 [2018-09-30 23:20:42,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:42,178 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-30 23:20:42,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:20:42,178 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-30 23:20:42,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:20:42,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:42,178 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:42,178 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:42,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:42,179 INFO L82 PathProgramCache]: Analyzing trace with hash -938776600, now seen corresponding path program 58 times [2018-09-30 23:20:42,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:42,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:42,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:42,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:44,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:44,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:44,007 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:44,096 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:44,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:44,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:44,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:44,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:20:44,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:20:44,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:20:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:20:44,151 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 62 states. [2018-09-30 23:20:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:44,327 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2018-09-30 23:20:44,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:20:44,328 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 134 [2018-09-30 23:20:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:44,329 INFO L225 Difference]: With dead ends: 151 [2018-09-30 23:20:44,329 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 23:20:44,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:20:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 23:20:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 23:20:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:20:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-30 23:20:44,334 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-30 23:20:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:44,334 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-30 23:20:44,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:20:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-30 23:20:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 23:20:44,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:44,335 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:44,335 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:44,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:44,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1385653732, now seen corresponding path program 59 times [2018-09-30 23:20:44,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:44,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:44,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:44,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:44,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:45,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:45,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:45,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:45,884 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 23:20:45,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:45,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:45,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:45,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:20:45,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:20:45,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:20:45,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:20:45,950 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 63 states. [2018-09-30 23:20:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:46,055 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2018-09-30 23:20:46,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:20:46,055 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 136 [2018-09-30 23:20:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:46,056 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:20:46,057 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:20:46,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:20:46,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:20:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:20:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:20:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-30 23:20:46,062 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 136 [2018-09-30 23:20:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:46,063 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-30 23:20:46,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:20:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-30 23:20:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:20:46,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:46,063 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:46,064 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:46,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:46,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1780208864, now seen corresponding path program 60 times [2018-09-30 23:20:46,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:46,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:46,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:46,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:46,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:47,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:47,609 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 [2018-09-30 23:20:47,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:47,813 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-30 23:20:47,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:47,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:47,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:47,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:20:47,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:20:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:20:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:20:47,879 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 64 states. [2018-09-30 23:20:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:48,030 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2018-09-30 23:20:48,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:20:48,030 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 138 [2018-09-30 23:20:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:48,031 INFO L225 Difference]: With dead ends: 155 [2018-09-30 23:20:48,032 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:20:48,032 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 [2018-09-30 23:20:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:20:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:20:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:20:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-30 23:20:48,038 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 138 [2018-09-30 23:20:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:48,038 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-30 23:20:48,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:20:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-30 23:20:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:20:48,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:48,040 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:48,040 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:48,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:48,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1304398628, now seen corresponding path program 61 times [2018-09-30 23:20:48,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:48,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:48,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:48,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:49,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:49,525 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 [2018-09-30 23:20:49,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:49,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:49,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:49,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:20:49,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:20:49,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:20:49,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:20:49,704 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 65 states. [2018-09-30 23:20:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:49,983 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-30 23:20:49,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:20:49,984 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 140 [2018-09-30 23:20:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:49,985 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:20:49,985 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:20:49,985 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 [2018-09-30 23:20:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:20:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 23:20:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:20:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-30 23:20:49,991 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-30 23:20:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:49,991 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-30 23:20:49,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:20:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-30 23:20:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:20:49,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:49,992 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:49,992 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:49,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:49,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2084764200, now seen corresponding path program 62 times [2018-09-30 23:20:49,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:49,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:49,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:49,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:49,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:51,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:51,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:51,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:51,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:51,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:51,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:51,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:51,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:20:51,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:20:51,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:20:51,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:20:51,820 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 66 states. [2018-09-30 23:20:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:52,421 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2018-09-30 23:20:52,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:20:52,422 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 142 [2018-09-30 23:20:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:52,423 INFO L225 Difference]: With dead ends: 159 [2018-09-30 23:20:52,423 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 23:20:52,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:20:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 23:20:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 23:20:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:20:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-30 23:20:52,431 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 142 [2018-09-30 23:20:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:52,431 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-30 23:20:52,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:20:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-30 23:20:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 23:20:52,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:52,432 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:52,433 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:52,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash -396802092, now seen corresponding path program 63 times [2018-09-30 23:20:52,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:52,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:52,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:52,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:52,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:54,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:54,629 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 [2018-09-30 23:20:54,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:54,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-30 23:20:54,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:54,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:54,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:54,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:20:54,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:20:54,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:20:54,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:20:54,873 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 67 states. [2018-09-30 23:20:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:55,086 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2018-09-30 23:20:55,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:20:55,086 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 144 [2018-09-30 23:20:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:55,087 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:20:55,087 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:20:55,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:20:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:20:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 23:20:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:20:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-09-30 23:20:55,094 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 144 [2018-09-30 23:20:55,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:55,094 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-09-30 23:20:55,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:20:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-09-30 23:20:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:20:55,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:55,095 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:55,096 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:55,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:55,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1762854192, now seen corresponding path program 64 times [2018-09-30 23:20:55,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:55,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:55,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:55,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:56,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:56,772 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 [2018-09-30 23:20:56,785 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:56,879 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:56,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:56,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:56,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:56,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:20:56,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:20:56,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:20:56,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:20:56,950 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 68 states. [2018-09-30 23:20:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:57,208 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2018-09-30 23:20:57,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:20:57,208 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 146 [2018-09-30 23:20:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:57,210 INFO L225 Difference]: With dead ends: 163 [2018-09-30 23:20:57,210 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:20:57,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:20:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:20:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:20:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:20:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-30 23:20:57,217 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-30 23:20:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:57,217 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-30 23:20:57,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:20:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-30 23:20:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:20:57,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:57,218 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:57,219 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:57,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash -278929716, now seen corresponding path program 65 times [2018-09-30 23:20:57,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:57,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:57,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:57,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:57,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:59,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:59,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:59,267 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:59,455 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 23:20:59,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:59,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:20:59,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:59,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:20:59,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:20:59,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:20:59,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:20:59,514 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 69 states. [2018-09-30 23:20:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:59,725 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2018-09-30 23:20:59,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:20:59,725 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 148 [2018-09-30 23:20:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:59,727 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:20:59,727 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:20:59,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:20:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:20:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:20:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:20:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-30 23:20:59,734 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2018-09-30 23:20:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:59,734 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-30 23:20:59,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:20:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-30 23:20:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:20:59,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:59,736 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:20:59,736 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:59,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash -156650552, now seen corresponding path program 66 times [2018-09-30 23:20:59,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:59,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:59,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:01,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:01,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:01,502 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:01,684 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-30 23:21:01,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:01,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:01,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:01,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:21:01,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:21:01,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:21:01,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:21:01,742 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 70 states. [2018-09-30 23:21:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:01,961 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2018-09-30 23:21:01,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:21:01,962 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 150 [2018-09-30 23:21:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:01,963 INFO L225 Difference]: With dead ends: 167 [2018-09-30 23:21:01,963 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 23:21:01,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:21:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 23:21:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 23:21:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 23:21:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2018-09-30 23:21:01,969 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2018-09-30 23:21:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:01,970 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2018-09-30 23:21:01,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:21:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2018-09-30 23:21:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:21:01,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:01,970 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:01,971 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:01,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:01,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1389509060, now seen corresponding path program 67 times [2018-09-30 23:21:01,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:01,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:01,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:01,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:01,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:04,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:04,277 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 [2018-09-30 23:21:04,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:04,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:04,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:04,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:21:04,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:21:04,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:21:04,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:21:04,439 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 71 states. [2018-09-30 23:21:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:04,664 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2018-09-30 23:21:04,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:21:04,665 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 152 [2018-09-30 23:21:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:04,666 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:21:04,666 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:21:04,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:21:04,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:21:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:21:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:21:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-30 23:21:04,673 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-30 23:21:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:04,673 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-30 23:21:04,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:21:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-30 23:21:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:21:04,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:04,674 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:04,674 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:04,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:04,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1190211776, now seen corresponding path program 68 times [2018-09-30 23:21:04,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:04,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:04,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:04,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:04,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:06,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:06,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:06,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:06,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:06,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:06,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:06,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:06,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:21:06,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:21:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:21:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:21:06,670 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 72 states. [2018-09-30 23:21:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:07,286 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-09-30 23:21:07,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:21:07,287 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 154 [2018-09-30 23:21:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:07,288 INFO L225 Difference]: With dead ends: 171 [2018-09-30 23:21:07,288 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:21:07,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:21:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:21:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:21:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:21:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-30 23:21:07,294 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 154 [2018-09-30 23:21:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:07,294 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-30 23:21:07,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:21:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-30 23:21:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:21:07,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:07,295 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:07,295 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:07,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1355917124, now seen corresponding path program 69 times [2018-09-30 23:21:07,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:07,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:07,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:07,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:09,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:09,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:09,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:09,778 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-30 23:21:09,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:09,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:09,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:09,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:21:09,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:21:09,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:21:09,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:21:09,832 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 73 states. [2018-09-30 23:21:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:09,970 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2018-09-30 23:21:09,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:21:09,970 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 156 [2018-09-30 23:21:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:09,971 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:21:09,972 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:21:09,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:21:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:21:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 23:21:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:21:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2018-09-30 23:21:09,979 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 156 [2018-09-30 23:21:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:09,979 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2018-09-30 23:21:09,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:21:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2018-09-30 23:21:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:21:09,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:09,980 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:09,981 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:09,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash -54431304, now seen corresponding path program 70 times [2018-09-30 23:21:09,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:09,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:09,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:09,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:09,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:11,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:11,875 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 [2018-09-30 23:21:11,882 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:11,987 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:11,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:11,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:12,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:12,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:21:12,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:21:12,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:21:12,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:21:12,053 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 74 states. [2018-09-30 23:21:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:12,309 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-30 23:21:12,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:21:12,309 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 158 [2018-09-30 23:21:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:12,310 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:21:12,310 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 23:21:12,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:21:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 23:21:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 23:21:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:21:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-30 23:21:12,317 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2018-09-30 23:21:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:12,317 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-30 23:21:12,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:21:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-30 23:21:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:21:12,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:12,318 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:12,319 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:12,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash 837958580, now seen corresponding path program 71 times [2018-09-30 23:21:12,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:12,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:12,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:12,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:14,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:14,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:14,557 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:14,763 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 23:21:14,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:14,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:14,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:14,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 23:21:14,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:21:14,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:21:14,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:21:14,836 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 75 states. [2018-09-30 23:21:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:15,003 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2018-09-30 23:21:15,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:21:15,003 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 160 [2018-09-30 23:21:15,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:15,005 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:21:15,005 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:21:15,005 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 [2018-09-30 23:21:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:21:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:21:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:21:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-30 23:21:15,012 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 160 [2018-09-30 23:21:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:15,013 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-30 23:21:15,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:21:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-30 23:21:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:21:15,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:15,014 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:15,014 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:15,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:15,014 INFO L82 PathProgramCache]: Analyzing trace with hash -568822096, now seen corresponding path program 72 times [2018-09-30 23:21:15,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:15,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:15,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:15,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:15,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:17,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:17,019 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 [2018-09-30 23:21:17,026 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:17,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-30 23:21:17,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:17,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:17,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:17,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:21:17,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:21:17,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:21:17,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:21:17,314 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 76 states. [2018-09-30 23:21:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:17,587 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2018-09-30 23:21:17,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:21:17,588 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 162 [2018-09-30 23:21:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:17,589 INFO L225 Difference]: With dead ends: 179 [2018-09-30 23:21:17,589 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 23:21:17,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:21:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 23:21:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 23:21:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:21:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-30 23:21:17,594 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 162 [2018-09-30 23:21:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:17,595 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-30 23:21:17,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:21:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-30 23:21:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:21:17,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:17,596 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:17,596 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:17,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:17,596 INFO L82 PathProgramCache]: Analyzing trace with hash 429646508, now seen corresponding path program 73 times [2018-09-30 23:21:17,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:17,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:17,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:17,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:17,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:19,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:19,949 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 [2018-09-30 23:21:19,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:20,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:20,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:20,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:21:20,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:21:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:21:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:21:20,124 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 77 states. [2018-09-30 23:21:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:20,300 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2018-09-30 23:21:20,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:21:20,300 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 164 [2018-09-30 23:21:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:20,302 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:21:20,302 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:21:20,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:21:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:21:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 23:21:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:21:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-30 23:21:20,307 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-30 23:21:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:20,307 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-30 23:21:20,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:21:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-30 23:21:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:21:20,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:20,308 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:20,308 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:20,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:20,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2114699352, now seen corresponding path program 74 times [2018-09-30 23:21:20,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:20,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:20,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:20,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:20,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:22,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:22,413 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 [2018-09-30 23:21:22,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:22,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:22,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:22,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:22,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:22,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:21:22,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:21:22,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:21:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:21:22,604 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 78 states. [2018-09-30 23:21:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:22,772 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2018-09-30 23:21:22,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:21:22,772 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 166 [2018-09-30 23:21:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:22,774 INFO L225 Difference]: With dead ends: 183 [2018-09-30 23:21:22,774 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:21:22,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:21:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:21:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 23:21:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:21:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-30 23:21:22,780 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 166 [2018-09-30 23:21:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:22,780 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-30 23:21:22,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:21:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-30 23:21:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:21:22,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:22,781 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:22,781 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:22,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:22,781 INFO L82 PathProgramCache]: Analyzing trace with hash 900287908, now seen corresponding path program 75 times [2018-09-30 23:21:22,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:22,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:22,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:22,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:25,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:25,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:25,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:25,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-09-30 23:21:25,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:25,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:25,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:25,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:21:25,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:21:25,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:21:25,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:21:25,516 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 79 states. [2018-09-30 23:21:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:25,697 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2018-09-30 23:21:25,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:21:25,698 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 168 [2018-09-30 23:21:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:25,699 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:21:25,699 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:21:25,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:21:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:21:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:21:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:21:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-30 23:21:25,705 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 168 [2018-09-30 23:21:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:25,705 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-30 23:21:25,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:21:25,705 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-30 23:21:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:21:25,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:25,706 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:25,706 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:25,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:25,706 INFO L82 PathProgramCache]: Analyzing trace with hash -799880032, now seen corresponding path program 76 times [2018-09-30 23:21:25,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:25,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:25,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:25,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:25,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:28,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:28,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:28,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:28,123 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:28,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:28,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:28,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:28,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:21:28,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:21:28,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:21:28,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:21:28,179 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 80 states. [2018-09-30 23:21:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:28,351 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2018-09-30 23:21:28,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:21:28,352 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 170 [2018-09-30 23:21:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:28,353 INFO L225 Difference]: With dead ends: 187 [2018-09-30 23:21:28,353 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:21:28,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:21:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:21:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:21:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:21:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-30 23:21:28,360 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-30 23:21:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:28,360 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-30 23:21:28,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:21:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-30 23:21:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:21:28,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:28,362 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:28,362 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:28,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:28,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1721269404, now seen corresponding path program 77 times [2018-09-30 23:21:28,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:28,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:28,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:28,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:30,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:30,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:30,987 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:31,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 23:21:31,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:31,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:31,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:31,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 23:21:31,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:21:31,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:21:31,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:21:31,268 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 81 states. [2018-09-30 23:21:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:31,455 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2018-09-30 23:21:31,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:21:31,456 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 172 [2018-09-30 23:21:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:31,457 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:21:31,457 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:21:31,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:21:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:21:31,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 23:21:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:21:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-30 23:21:31,463 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 172 [2018-09-30 23:21:31,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:31,463 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-30 23:21:31,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:21:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-30 23:21:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:21:31,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:31,465 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:31,465 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:31,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:31,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2110644840, now seen corresponding path program 78 times [2018-09-30 23:21:31,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:31,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:31,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:31,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:31,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:34,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:34,208 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 [2018-09-30 23:21:34,228 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:34,455 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-09-30 23:21:34,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:34,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:34,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:34,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:21:34,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:21:34,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:21:34,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:21:34,513 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 82 states. [2018-09-30 23:21:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:34,823 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2018-09-30 23:21:34,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:21:34,823 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 174 [2018-09-30 23:21:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:34,824 INFO L225 Difference]: With dead ends: 191 [2018-09-30 23:21:34,824 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 23:21:34,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:21:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 23:21:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 23:21:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 23:21:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-09-30 23:21:34,830 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2018-09-30 23:21:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:34,830 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-09-30 23:21:34,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:21:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-09-30 23:21:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 23:21:34,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:34,831 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:34,831 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:34,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash 501706644, now seen corresponding path program 79 times [2018-09-30 23:21:34,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:34,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:34,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:34,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:34,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:37,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:37,200 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 [2018-09-30 23:21:37,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:37,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:37,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:37,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:21:37,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:21:37,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:21:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:21:37,377 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 83 states. [2018-09-30 23:21:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:37,583 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-30 23:21:37,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:21:37,584 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 176 [2018-09-30 23:21:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:37,585 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:21:37,585 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:21:37,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:21:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:21:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 23:21:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 23:21:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2018-09-30 23:21:37,590 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2018-09-30 23:21:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:37,591 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2018-09-30 23:21:37,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:21:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2018-09-30 23:21:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:21:37,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:37,591 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:37,592 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:37,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:37,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1584385392, now seen corresponding path program 80 times [2018-09-30 23:21:37,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:37,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:37,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:37,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:37,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:40,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:40,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:40,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:40,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:40,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:40,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:40,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:40,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:21:40,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:21:40,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:21:40,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:21:40,524 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 84 states. [2018-09-30 23:21:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:40,833 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-30 23:21:40,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:21:40,834 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 178 [2018-09-30 23:21:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:40,834 INFO L225 Difference]: With dead ends: 195 [2018-09-30 23:21:40,835 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 23:21:40,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:21:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 23:21:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 23:21:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:21:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-30 23:21:40,840 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2018-09-30 23:21:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:40,840 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-30 23:21:40,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:21:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-30 23:21:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 23:21:40,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:40,841 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:40,841 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:40,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash -569104756, now seen corresponding path program 81 times [2018-09-30 23:21:40,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:40,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:40,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:40,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:40,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:43,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:43,380 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 [2018-09-30 23:21:43,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:43,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-09-30 23:21:43,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:43,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:43,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:43,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:21:43,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:21:43,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:21:43,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:21:43,724 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 85 states. [2018-09-30 23:21:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:43,997 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2018-09-30 23:21:43,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:21:43,997 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 180 [2018-09-30 23:21:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:43,998 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:21:43,998 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:21:43,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:21:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:21:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 23:21:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 23:21:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2018-09-30 23:21:44,005 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2018-09-30 23:21:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:44,006 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2018-09-30 23:21:44,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:21:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2018-09-30 23:21:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:21:44,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:44,007 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:44,007 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:44,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:44,007 INFO L82 PathProgramCache]: Analyzing trace with hash 158010248, now seen corresponding path program 82 times [2018-09-30 23:21:44,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:44,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:44,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:44,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:44,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:46,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:46,655 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 [2018-09-30 23:21:46,662 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:46,783 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:46,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:46,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:46,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:46,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:21:46,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:21:46,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:21:46,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:21:46,843 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 86 states. [2018-09-30 23:21:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:47,067 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2018-09-30 23:21:47,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:21:47,067 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 182 [2018-09-30 23:21:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:47,068 INFO L225 Difference]: With dead ends: 199 [2018-09-30 23:21:47,069 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 23:21:47,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:21:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 23:21:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 23:21:47,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:21:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-30 23:21:47,076 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-30 23:21:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:47,076 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-30 23:21:47,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:21:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-30 23:21:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 23:21:47,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:47,077 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:47,078 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:47,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:47,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1164140156, now seen corresponding path program 83 times [2018-09-30 23:21:47,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:47,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:47,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:47,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:47,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:50,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:50,026 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 [2018-09-30 23:21:50,035 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:50,284 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 23:21:50,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:50,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:50,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:50,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 23:21:50,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:21:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:21:50,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:21:50,344 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 87 states. [2018-09-30 23:21:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:50,678 INFO L93 Difference]: Finished difference Result 201 states and 205 transitions. [2018-09-30 23:21:50,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:21:50,678 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 184 [2018-09-30 23:21:50,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:50,679 INFO L225 Difference]: With dead ends: 201 [2018-09-30 23:21:50,679 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:21:50,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:21:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:21:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 23:21:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:21:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-30 23:21:50,687 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 184 [2018-09-30 23:21:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:50,687 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-30 23:21:50,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:21:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-30 23:21:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 23:21:50,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:50,688 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:50,688 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:50,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:50,689 INFO L82 PathProgramCache]: Analyzing trace with hash -440358784, now seen corresponding path program 84 times [2018-09-30 23:21:50,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:50,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:50,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:50,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:50,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:53,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:53,351 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 [2018-09-30 23:21:53,358 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:53,618 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-30 23:21:53,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:53,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:53,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:53,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:21:53,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:21:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:21:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:21:53,678 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 88 states. [2018-09-30 23:21:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:53,987 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-09-30 23:21:53,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:21:53,987 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 186 [2018-09-30 23:21:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:53,988 INFO L225 Difference]: With dead ends: 203 [2018-09-30 23:21:53,989 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 23:21:53,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:21:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 23:21:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 23:21:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 23:21:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-09-30 23:21:53,996 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 186 [2018-09-30 23:21:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:53,997 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-09-30 23:21:53,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:21:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-09-30 23:21:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:21:53,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:53,998 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:53,998 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:53,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:53,998 INFO L82 PathProgramCache]: Analyzing trace with hash -671162244, now seen corresponding path program 85 times [2018-09-30 23:21:53,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:53,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:53,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:53,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:53,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:57,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:57,041 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 [2018-09-30 23:21:57,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:57,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:21:57,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:57,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:21:57,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:21:57,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:21:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:21:57,231 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 89 states. [2018-09-30 23:21:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:57,464 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2018-09-30 23:21:57,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:21:57,465 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 188 [2018-09-30 23:21:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:57,466 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:21:57,466 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:21:57,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:21:57,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:21:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 23:21:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:21:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-30 23:21:57,475 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-30 23:21:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:57,475 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-30 23:21:57,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:21:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-30 23:21:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 23:21:57,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:57,477 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:21:57,477 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:57,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash 865012088, now seen corresponding path program 86 times [2018-09-30 23:21:57,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:57,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:57,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:57,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:57,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:00,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:00,754 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 [2018-09-30 23:22:00,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:00,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:00,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:00,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:00,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:00,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:22:00,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:22:00,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:22:00,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:22:00,941 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 90 states. [2018-09-30 23:22:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:01,136 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2018-09-30 23:22:01,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:22:01,136 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 190 [2018-09-30 23:22:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:01,138 INFO L225 Difference]: With dead ends: 207 [2018-09-30 23:22:01,138 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 23:22:01,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:22:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 23:22:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 23:22:01,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 23:22:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-30 23:22:01,145 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 190 [2018-09-30 23:22:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:01,145 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-30 23:22:01,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:22:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-30 23:22:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 23:22:01,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:01,146 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:01,146 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:01,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:01,146 INFO L82 PathProgramCache]: Analyzing trace with hash -340204684, now seen corresponding path program 87 times [2018-09-30 23:22:01,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:01,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:01,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:01,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:01,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:04,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:04,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:04,116 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:04,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-09-30 23:22:04,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:04,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:04,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:04,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 23:22:04,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:22:04,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:22:04,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:22:04,465 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 91 states. [2018-09-30 23:22:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:04,788 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2018-09-30 23:22:04,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:22:04,789 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 192 [2018-09-30 23:22:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:04,790 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:22:04,790 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:22:04,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:22:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:22:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 23:22:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:22:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-30 23:22:04,796 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 192 [2018-09-30 23:22:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:04,797 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-30 23:22:04,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:22:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-30 23:22:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:22:04,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:04,798 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:04,798 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:04,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:04,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1087647344, now seen corresponding path program 88 times [2018-09-30 23:22:04,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:04,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:04,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:04,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:04,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:07,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:07,776 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 [2018-09-30 23:22:07,783 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:07,910 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:07,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:07,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:07,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:07,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:22:07,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:22:07,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:22:07,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:22:07,985 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 92 states. [2018-09-30 23:22:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:08,231 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-30 23:22:08,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:22:08,231 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 194 [2018-09-30 23:22:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:08,233 INFO L225 Difference]: With dead ends: 211 [2018-09-30 23:22:08,233 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 23:22:08,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:22:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 23:22:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 23:22:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 23:22:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2018-09-30 23:22:08,239 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 194 [2018-09-30 23:22:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:08,240 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2018-09-30 23:22:08,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:22:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2018-09-30 23:22:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 23:22:08,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:08,241 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:08,241 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:08,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1136088468, now seen corresponding path program 89 times [2018-09-30 23:22:08,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:08,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:08,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:08,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:11,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:11,506 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 [2018-09-30 23:22:11,515 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:11,792 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-09-30 23:22:11,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:11,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:11,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:11,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 23:22:11,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:22:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:22:11,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:22:11,856 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 93 states. [2018-09-30 23:22:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:12,183 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2018-09-30 23:22:12,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:22:12,184 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 196 [2018-09-30 23:22:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:12,185 INFO L225 Difference]: With dead ends: 213 [2018-09-30 23:22:12,185 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:22:12,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:22:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:22:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 23:22:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:22:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-30 23:22:12,191 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 196 [2018-09-30 23:22:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:12,191 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-30 23:22:12,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:22:12,191 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-30 23:22:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:22:12,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:12,192 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:12,192 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:12,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash 747509608, now seen corresponding path program 90 times [2018-09-30 23:22:12,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:12,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:12,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:12,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:12,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:15,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:15,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:15,586 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:15,870 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-09-30 23:22:15,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:15,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:15,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:15,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:22:15,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:22:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:22:15,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:22:15,934 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 94 states. [2018-09-30 23:22:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:16,132 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2018-09-30 23:22:16,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:22:16,132 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 198 [2018-09-30 23:22:16,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:16,134 INFO L225 Difference]: With dead ends: 215 [2018-09-30 23:22:16,134 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 23:22:16,134 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 [2018-09-30 23:22:16,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 23:22:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 23:22:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 23:22:16,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-30 23:22:16,140 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 198 [2018-09-30 23:22:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:16,141 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-30 23:22:16,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:22:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-30 23:22:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 23:22:16,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:16,142 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:16,142 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:16,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:16,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1590938268, now seen corresponding path program 91 times [2018-09-30 23:22:16,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:16,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:16,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:16,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:16,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:19,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:19,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:19,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:19,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:19,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:19,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:22:19,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:22:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:22:19,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:22:19,543 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 95 states. [2018-09-30 23:22:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:19,765 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2018-09-30 23:22:19,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:22:19,766 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 200 [2018-09-30 23:22:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:19,767 INFO L225 Difference]: With dead ends: 217 [2018-09-30 23:22:19,767 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:22:19,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:22:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:22:19,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 23:22:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:22:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-30 23:22:19,774 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-30 23:22:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:19,775 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-30 23:22:19,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:22:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-30 23:22:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:22:19,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:19,775 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:19,776 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:19,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1723516000, now seen corresponding path program 92 times [2018-09-30 23:22:19,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:19,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:19,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:19,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:19,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:24,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:24,028 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 [2018-09-30 23:22:24,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:24,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:24,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:24,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:24,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:24,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:22:24,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:22:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:22:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:22:24,234 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 96 states. [2018-09-30 23:22:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:24,488 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2018-09-30 23:22:24,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:22:24,488 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 202 [2018-09-30 23:22:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:24,490 INFO L225 Difference]: With dead ends: 219 [2018-09-30 23:22:24,490 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 23:22:24,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:22:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 23:22:24,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 23:22:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 23:22:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-30 23:22:24,499 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2018-09-30 23:22:24,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:24,499 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-30 23:22:24,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:22:24,499 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-30 23:22:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 23:22:24,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:24,500 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:24,500 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:24,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash 48333916, now seen corresponding path program 93 times [2018-09-30 23:22:24,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:24,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:24,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:24,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:24,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:28,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:28,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:28,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:28,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2018-09-30 23:22:28,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:28,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:28,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:28,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 23:22:28,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:22:28,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:22:28,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:22:28,555 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 97 states. [2018-09-30 23:22:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:28,792 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2018-09-30 23:22:28,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:22:28,792 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 204 [2018-09-30 23:22:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:28,794 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:22:28,794 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 23:22:28,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:22:28,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 23:22:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 23:22:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 23:22:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2018-09-30 23:22:28,800 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2018-09-30 23:22:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:28,800 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2018-09-30 23:22:28,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:22:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2018-09-30 23:22:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 23:22:28,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:28,801 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:28,801 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:28,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:28,801 INFO L82 PathProgramCache]: Analyzing trace with hash 811087192, now seen corresponding path program 94 times [2018-09-30 23:22:28,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:28,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:28,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:28,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:28,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:32,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:32,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:32,528 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:32,656 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:32,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:32,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:32,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:32,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:22:32,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:22:32,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:22:32,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:22:32,724 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 98 states. [2018-09-30 23:22:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:32,929 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2018-09-30 23:22:32,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:22:32,929 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 206 [2018-09-30 23:22:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:32,931 INFO L225 Difference]: With dead ends: 223 [2018-09-30 23:22:32,931 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 23:22:32,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:22:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 23:22:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 23:22:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 23:22:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-30 23:22:32,937 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-30 23:22:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:32,937 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-30 23:22:32,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:22:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-30 23:22:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 23:22:32,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:32,938 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:32,938 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:32,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash -622422188, now seen corresponding path program 95 times [2018-09-30 23:22:32,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:32,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:32,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:32,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:32,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:36,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:36,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:36,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:37,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2018-09-30 23:22:37,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:37,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:37,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:37,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 23:22:37,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:22:37,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:22:37,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:22:37,079 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 99 states. [2018-09-30 23:22:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:37,436 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-30 23:22:37,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:22:37,437 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 208 [2018-09-30 23:22:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:37,438 INFO L225 Difference]: With dead ends: 225 [2018-09-30 23:22:37,438 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:22:37,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:22:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:22:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 23:22:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:22:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-30 23:22:37,445 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 208 [2018-09-30 23:22:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:37,445 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-30 23:22:37,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:22:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-30 23:22:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 23:22:37,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:37,446 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:37,446 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:37,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:37,446 INFO L82 PathProgramCache]: Analyzing trace with hash 459565648, now seen corresponding path program 96 times [2018-09-30 23:22:37,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:37,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:37,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:37,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:37,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:41,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:41,246 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 [2018-09-30 23:22:41,254 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:41,562 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2018-09-30 23:22:41,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:41,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:41,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:41,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:22:41,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:22:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:22:41,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:22:41,632 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 100 states. [2018-09-30 23:22:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:41,949 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2018-09-30 23:22:41,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:22:41,950 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 210 [2018-09-30 23:22:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:41,951 INFO L225 Difference]: With dead ends: 227 [2018-09-30 23:22:41,951 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 23:22:41,951 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 [2018-09-30 23:22:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 23:22:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 23:22:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 23:22:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2018-09-30 23:22:41,957 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 210 [2018-09-30 23:22:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:41,957 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2018-09-30 23:22:41,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:22:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2018-09-30 23:22:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 23:22:41,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:41,958 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:41,959 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:41,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:41,959 INFO L82 PathProgramCache]: Analyzing trace with hash 867790412, now seen corresponding path program 97 times [2018-09-30 23:22:41,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:41,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:41,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:41,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:41,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:45,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:45,851 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 [2018-09-30 23:22:45,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:45,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:46,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:46,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 23:22:46,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:22:46,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:22:46,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:22:46,059 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 101 states. [2018-09-30 23:22:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:46,369 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-30 23:22:46,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:22:46,369 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 212 [2018-09-30 23:22:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:46,370 INFO L225 Difference]: With dead ends: 229 [2018-09-30 23:22:46,370 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 23:22:46,371 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 [2018-09-30 23:22:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 23:22:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 23:22:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 23:22:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-30 23:22:46,379 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 212 [2018-09-30 23:22:46,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:46,380 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-30 23:22:46,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:22:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-30 23:22:46,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 23:22:46,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:46,381 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:46,381 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:46,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1965202616, now seen corresponding path program 98 times [2018-09-30 23:22:46,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:46,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:46,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:46,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:46,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:50,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:50,031 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 [2018-09-30 23:22:50,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:50,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:50,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:50,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:50,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:50,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:22:50,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:22:50,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:22:50,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:22:50,265 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 102 states. [2018-09-30 23:22:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:50,641 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2018-09-30 23:22:50,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:22:50,641 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 214 [2018-09-30 23:22:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:50,642 INFO L225 Difference]: With dead ends: 231 [2018-09-30 23:22:50,643 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 23:22:50,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:22:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 23:22:50,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 23:22:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 23:22:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-09-30 23:22:50,653 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 214 [2018-09-30 23:22:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:50,653 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-09-30 23:22:50,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:22:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-09-30 23:22:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 23:22:50,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:50,654 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:50,655 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:50,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:50,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1462236860, now seen corresponding path program 99 times [2018-09-30 23:22:50,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:50,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:50,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:50,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:50,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:54,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:54,431 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 [2018-09-30 23:22:54,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:54,790 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2018-09-30 23:22:54,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:54,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:54,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:54,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 23:22:54,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:22:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:22:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:22:54,859 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 103 states. [2018-09-30 23:22:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:55,302 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2018-09-30 23:22:55,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:22:55,303 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 216 [2018-09-30 23:22:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:55,304 INFO L225 Difference]: With dead ends: 233 [2018-09-30 23:22:55,304 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:22:55,305 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 [2018-09-30 23:22:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:22:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 23:22:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 23:22:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2018-09-30 23:22:55,312 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 216 [2018-09-30 23:22:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:55,312 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2018-09-30 23:22:55,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:22:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2018-09-30 23:22:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:22:55,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:55,313 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:22:55,313 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:55,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash 851517504, now seen corresponding path program 100 times [2018-09-30 23:22:55,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:55,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:55,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:55,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:55,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:59,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:59,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:59,403 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:59,544 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:59,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:59,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:22:59,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:59,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:22:59,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:22:59,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:22:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:22:59,631 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 104 states. [2018-09-30 23:23:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:00,055 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-09-30 23:23:00,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:23:00,055 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 218 [2018-09-30 23:23:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:00,056 INFO L225 Difference]: With dead ends: 235 [2018-09-30 23:23:00,056 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:23:00,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:23:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:23:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 23:23:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 23:23:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-30 23:23:00,064 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-09-30 23:23:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:00,064 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-30 23:23:00,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:23:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-30 23:23:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 23:23:00,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:00,066 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:00,066 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:00,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:00,066 INFO L82 PathProgramCache]: Analyzing trace with hash -423598020, now seen corresponding path program 101 times [2018-09-30 23:23:00,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:00,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:00,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:00,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:00,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:04,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:04,359 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 [2018-09-30 23:23:04,366 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:04,703 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2018-09-30 23:23:04,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:04,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:04,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:04,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 23:23:04,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:23:04,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:23:04,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:23:04,777 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 105 states. [2018-09-30 23:23:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:05,248 INFO L93 Difference]: Finished difference Result 237 states and 241 transitions. [2018-09-30 23:23:05,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:23:05,248 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 220 [2018-09-30 23:23:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:05,249 INFO L225 Difference]: With dead ends: 237 [2018-09-30 23:23:05,249 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 23:23:05,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:23:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 23:23:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 23:23:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 23:23:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-09-30 23:23:05,259 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 220 [2018-09-30 23:23:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:05,259 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-09-30 23:23:05,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:23:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-09-30 23:23:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 23:23:05,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:05,260 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:05,260 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:05,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:05,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1743937224, now seen corresponding path program 102 times [2018-09-30 23:23:05,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:05,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:05,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:05,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:05,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:09,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:09,509 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 [2018-09-30 23:23:09,516 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:09,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 104 check-sat command(s) [2018-09-30 23:23:09,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:09,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:09,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:09,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:23:09,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:23:09,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:23:09,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:23:09,937 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 106 states. [2018-09-30 23:23:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:10,410 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2018-09-30 23:23:10,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:23:10,411 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 222 [2018-09-30 23:23:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:10,411 INFO L225 Difference]: With dead ends: 239 [2018-09-30 23:23:10,411 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 23:23:10,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:23:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 23:23:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 23:23:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 23:23:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-30 23:23:10,418 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 222 [2018-09-30 23:23:10,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:10,419 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-30 23:23:10,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:23:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-30 23:23:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 23:23:10,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:10,420 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:10,420 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:10,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash 720407348, now seen corresponding path program 103 times [2018-09-30 23:23:10,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:10,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:10,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:10,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:10,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:14,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:14,750 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 [2018-09-30 23:23:14,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:14,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:14,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:14,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 23:23:14,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:23:14,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:23:14,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:23:14,992 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 107 states. [2018-09-30 23:23:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:15,306 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2018-09-30 23:23:15,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:23:15,306 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 224 [2018-09-30 23:23:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:15,307 INFO L225 Difference]: With dead ends: 241 [2018-09-30 23:23:15,307 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 23:23:15,308 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 [2018-09-30 23:23:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 23:23:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 23:23:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 23:23:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-09-30 23:23:15,316 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-09-30 23:23:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:15,316 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-09-30 23:23:15,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:23:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-09-30 23:23:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 23:23:15,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:15,317 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:15,318 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:15,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1866406352, now seen corresponding path program 104 times [2018-09-30 23:23:15,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:15,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:15,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:15,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:15,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:19,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:19,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:23:19,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:19,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:19,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:19,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:19,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:19,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:23:19,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:23:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:23:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:23:19,893 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 108 states. [2018-09-30 23:23:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:20,263 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2018-09-30 23:23:20,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:23:20,263 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 226 [2018-09-30 23:23:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:20,264 INFO L225 Difference]: With dead ends: 243 [2018-09-30 23:23:20,264 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 23:23:20,265 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 [2018-09-30 23:23:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 23:23:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 23:23:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 23:23:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-09-30 23:23:20,272 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 226 [2018-09-30 23:23:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:20,272 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-09-30 23:23:20,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:23:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-09-30 23:23:20,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 23:23:20,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:20,273 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:20,273 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:20,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1008307668, now seen corresponding path program 105 times [2018-09-30 23:23:20,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:20,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:20,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:20,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:20,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:24,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:24,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:23:24,834 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:25,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 107 check-sat command(s) [2018-09-30 23:23:25,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:25,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:25,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:25,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 23:23:25,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:23:25,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:23:25,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:23:25,303 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 109 states. [2018-09-30 23:23:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:25,806 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2018-09-30 23:23:25,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:23:25,806 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 228 [2018-09-30 23:23:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:25,807 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:23:25,807 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 23:23:25,808 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 [2018-09-30 23:23:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 23:23:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 23:23:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 23:23:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-30 23:23:25,817 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2018-09-30 23:23:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:25,817 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-30 23:23:25,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:23:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-30 23:23:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 23:23:25,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:25,818 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:25,818 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:25,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:25,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1009193176, now seen corresponding path program 106 times [2018-09-30 23:23:25,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:25,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:25,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:25,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:25,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:30,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:30,334 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 [2018-09-30 23:23:30,364 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:30,518 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:30,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:30,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:30,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:30,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:23:30,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:23:30,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:23:30,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:23:30,594 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 110 states. [2018-09-30 23:23:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:30,939 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-09-30 23:23:30,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:23:30,940 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 230 [2018-09-30 23:23:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:30,940 INFO L225 Difference]: With dead ends: 247 [2018-09-30 23:23:30,941 INFO L226 Difference]: Without dead ends: 233 [2018-09-30 23:23:30,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:23:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-30 23:23:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-30 23:23:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 23:23:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2018-09-30 23:23:30,948 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 230 [2018-09-30 23:23:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:30,949 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2018-09-30 23:23:30,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:23:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2018-09-30 23:23:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 23:23:30,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:30,949 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:30,949 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:30,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:30,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1860166364, now seen corresponding path program 107 times [2018-09-30 23:23:30,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:30,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:30,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:30,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:30,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11790 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:35,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:35,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:35,460 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:35,840 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 109 check-sat command(s) [2018-09-30 23:23:35,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:35,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11790 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:35,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:35,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 23:23:35,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 23:23:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 23:23:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:23:35,918 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand 111 states. [2018-09-30 23:23:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:36,211 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2018-09-30 23:23:36,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:23:36,212 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 232 [2018-09-30 23:23:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:36,212 INFO L225 Difference]: With dead ends: 249 [2018-09-30 23:23:36,212 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 23:23:36,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:23:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 23:23:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 23:23:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 23:23:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-09-30 23:23:36,220 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 232 [2018-09-30 23:23:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:36,220 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-09-30 23:23:36,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 23:23:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-09-30 23:23:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 23:23:36,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:36,221 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:36,221 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:36,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:36,221 INFO L82 PathProgramCache]: Analyzing trace with hash 693353504, now seen corresponding path program 108 times [2018-09-30 23:23:36,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:36,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:36,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:36,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:36,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12008 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:40,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:40,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:40,908 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:41,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 110 check-sat command(s) [2018-09-30 23:23:41,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:41,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12008 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:41,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:41,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:23:41,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:23:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:23:41,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:23:41,415 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 112 states. [2018-09-30 23:23:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:41,847 INFO L93 Difference]: Finished difference Result 251 states and 255 transitions. [2018-09-30 23:23:41,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:23:41,847 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 234 [2018-09-30 23:23:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:41,848 INFO L225 Difference]: With dead ends: 251 [2018-09-30 23:23:41,848 INFO L226 Difference]: Without dead ends: 237 [2018-09-30 23:23:41,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:23:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-30 23:23:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-30 23:23:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-30 23:23:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2018-09-30 23:23:41,856 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 234 [2018-09-30 23:23:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:41,856 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2018-09-30 23:23:41,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:23:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2018-09-30 23:23:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 23:23:41,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:41,857 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:41,857 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:41,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:41,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2095346660, now seen corresponding path program 109 times [2018-09-30 23:23:41,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:41,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:41,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:41,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:41,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12228 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:46,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:46,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:46,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:46,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12228 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:46,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:46,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 23:23:46,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:23:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:23:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:23:46,576 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand 113 states. [2018-09-30 23:23:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:47,133 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2018-09-30 23:23:47,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:23:47,133 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 236 [2018-09-30 23:23:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:47,134 INFO L225 Difference]: With dead ends: 253 [2018-09-30 23:23:47,134 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 23:23:47,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:23:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 23:23:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 23:23:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 23:23:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2018-09-30 23:23:47,143 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 236 [2018-09-30 23:23:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:47,144 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2018-09-30 23:23:47,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:23:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2018-09-30 23:23:47,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 23:23:47,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:47,145 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:47,145 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:47,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1976611560, now seen corresponding path program 110 times [2018-09-30 23:23:47,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:47,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:47,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:47,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:47,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12450 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:51,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:51,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:51,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:51,867 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:51,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:51,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12450 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:51,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:51,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:23:51,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:23:51,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:23:51,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:23:51,947 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand 114 states. [2018-09-30 23:23:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:52,362 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-09-30 23:23:52,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:23:52,362 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 238 [2018-09-30 23:23:52,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:52,363 INFO L225 Difference]: With dead ends: 255 [2018-09-30 23:23:52,363 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 23:23:52,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:23:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 23:23:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 23:23:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 23:23:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-09-30 23:23:52,371 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 238 [2018-09-30 23:23:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:52,372 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-09-30 23:23:52,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:23:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-09-30 23:23:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 23:23:52,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:52,372 INFO L375 BasicCegarLoop]: trace histogram [113, 112, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:52,373 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:52,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash 458669844, now seen corresponding path program 111 times [2018-09-30 23:23:52,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:52,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:52,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:52,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12674 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:57,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:57,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:57,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:57,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 113 check-sat command(s) [2018-09-30 23:23:57,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:57,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12674 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:23:57,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:57,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 23:23:57,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 23:23:57,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 23:23:57,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:23:57,619 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 115 states. [2018-09-30 23:23:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:57,985 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2018-09-30 23:23:57,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:23:57,985 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 240 [2018-09-30 23:23:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:57,986 INFO L225 Difference]: With dead ends: 257 [2018-09-30 23:23:57,987 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 23:23:57,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:23:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 23:23:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-30 23:23:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 23:23:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2018-09-30 23:23:57,994 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 240 [2018-09-30 23:23:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:57,994 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2018-09-30 23:23:57,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 23:23:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2018-09-30 23:23:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:23:57,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:57,995 INFO L375 BasicCegarLoop]: trace histogram [114, 113, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:23:57,995 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:57,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash 6922768, now seen corresponding path program 112 times [2018-09-30 23:23:57,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:57,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:57,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:57,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:57,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12900 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:03,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:03,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:03,022 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:03,179 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:03,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:03,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12900 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:03,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:03,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:24:03,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:24:03,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:24:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:24:03,265 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand 116 states. [2018-09-30 23:24:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:03,565 INFO L93 Difference]: Finished difference Result 259 states and 263 transitions. [2018-09-30 23:24:03,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:24:03,565 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 242 [2018-09-30 23:24:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:03,566 INFO L225 Difference]: With dead ends: 259 [2018-09-30 23:24:03,566 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 23:24:03,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:24:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 23:24:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 23:24:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 23:24:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-09-30 23:24:03,573 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 242 [2018-09-30 23:24:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:03,573 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-09-30 23:24:03,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:24:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-09-30 23:24:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 23:24:03,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:03,574 INFO L375 BasicCegarLoop]: trace histogram [115, 114, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:24:03,574 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:03,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:03,575 INFO L82 PathProgramCache]: Analyzing trace with hash -330320372, now seen corresponding path program 113 times [2018-09-30 23:24:03,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:03,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:03,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:03,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:03,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13128 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:08,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:08,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:08,545 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:08,967 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 115 check-sat command(s) [2018-09-30 23:24:08,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:08,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13128 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:09,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:09,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 23:24:09,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 23:24:09,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 23:24:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:24:09,064 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 117 states. [2018-09-30 23:24:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:09,648 INFO L93 Difference]: Finished difference Result 261 states and 265 transitions. [2018-09-30 23:24:09,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:24:09,648 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 244 [2018-09-30 23:24:09,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:09,649 INFO L225 Difference]: With dead ends: 261 [2018-09-30 23:24:09,649 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 23:24:09,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:24:09,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 23:24:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 23:24:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 23:24:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2018-09-30 23:24:09,656 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 244 [2018-09-30 23:24:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:09,657 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2018-09-30 23:24:09,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 23:24:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2018-09-30 23:24:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 23:24:09,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:09,657 INFO L375 BasicCegarLoop]: trace histogram [116, 115, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:24:09,658 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:09,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1996536584, now seen corresponding path program 114 times [2018-09-30 23:24:09,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:09,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:09,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:09,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:09,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13358 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:14,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:14,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:14,859 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:15,303 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 116 check-sat command(s) [2018-09-30 23:24:15,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:15,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13358 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:15,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:15,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:24:15,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:24:15,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:24:15,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:24:15,383 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand 118 states. [2018-09-30 23:24:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:15,906 INFO L93 Difference]: Finished difference Result 263 states and 267 transitions. [2018-09-30 23:24:15,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:24:15,906 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 246 [2018-09-30 23:24:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:15,907 INFO L225 Difference]: With dead ends: 263 [2018-09-30 23:24:15,907 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 23:24:15,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:24:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 23:24:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-09-30 23:24:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-30 23:24:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2018-09-30 23:24:15,914 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 246 [2018-09-30 23:24:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:15,914 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2018-09-30 23:24:15,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:24:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2018-09-30 23:24:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 23:24:15,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:15,915 INFO L375 BasicCegarLoop]: trace histogram [117, 116, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:24:15,915 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:15,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:15,916 INFO L82 PathProgramCache]: Analyzing trace with hash 428110084, now seen corresponding path program 115 times [2018-09-30 23:24:15,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:15,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:15,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:15,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13590 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:21,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:21,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:21,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:21,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13590 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:21,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:21,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 23:24:21,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:24:21,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:24:21,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:24:21,356 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand 119 states. [2018-09-30 23:24:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:21,909 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-09-30 23:24:21,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:24:21,909 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 248 [2018-09-30 23:24:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:21,910 INFO L225 Difference]: With dead ends: 265 [2018-09-30 23:24:21,910 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 23:24:21,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:24:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 23:24:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 23:24:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 23:24:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2018-09-30 23:24:21,918 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 248 [2018-09-30 23:24:21,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:21,919 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2018-09-30 23:24:21,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:24:21,919 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2018-09-30 23:24:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 23:24:21,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:21,920 INFO L375 BasicCegarLoop]: trace histogram [118, 117, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:24:21,920 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:21,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:21,920 INFO L82 PathProgramCache]: Analyzing trace with hash 703764480, now seen corresponding path program 116 times [2018-09-30 23:24:21,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:21,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:21,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:21,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:21,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13824 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:27,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:27,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:27,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:27,680 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:27,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:27,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13824 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:27,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:27,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:24:27,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:24:27,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:24:27,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:24:27,762 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 120 states. [2018-09-30 23:24:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:28,284 INFO L93 Difference]: Finished difference Result 267 states and 271 transitions. [2018-09-30 23:24:28,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:24:28,284 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 250 [2018-09-30 23:24:28,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:28,285 INFO L225 Difference]: With dead ends: 267 [2018-09-30 23:24:28,285 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 23:24:28,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:24:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 23:24:28,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 23:24:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 23:24:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2018-09-30 23:24:28,293 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 250 [2018-09-30 23:24:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:28,293 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2018-09-30 23:24:28,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:24:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2018-09-30 23:24:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 23:24:28,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:28,294 INFO L375 BasicCegarLoop]: trace histogram [119, 118, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:24:28,294 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:28,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:28,294 INFO L82 PathProgramCache]: Analyzing trace with hash -680333316, now seen corresponding path program 117 times [2018-09-30 23:24:28,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:28,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:28,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:28,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:28,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14060 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:33,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:33,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:33,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:34,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 119 check-sat command(s) [2018-09-30 23:24:34,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:34,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14060 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:34,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:34,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 23:24:34,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 23:24:34,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 23:24:34,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:24:34,349 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand 121 states. [2018-09-30 23:24:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:34,869 INFO L93 Difference]: Finished difference Result 269 states and 273 transitions. [2018-09-30 23:24:34,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:24:34,870 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 252 [2018-09-30 23:24:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:34,871 INFO L225 Difference]: With dead ends: 269 [2018-09-30 23:24:34,871 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 23:24:34,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:24:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 23:24:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-30 23:24:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 23:24:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-09-30 23:24:34,878 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 252 [2018-09-30 23:24:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:34,878 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-09-30 23:24:34,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 23:24:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-09-30 23:24:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 23:24:34,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:34,879 INFO L375 BasicCegarLoop]: trace histogram [120, 119, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:24:34,879 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:34,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash 641546488, now seen corresponding path program 118 times [2018-09-30 23:24:34,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:34,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:34,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:34,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:34,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14298 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:40,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:40,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:40,452 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:40,626 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:40,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:40,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14298 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:40,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:40,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 23:24:40,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:24:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:24:40,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:24:40,716 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 122 states. [2018-09-30 23:24:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:41,186 INFO L93 Difference]: Finished difference Result 271 states and 275 transitions. [2018-09-30 23:24:41,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:24:41,187 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 254 [2018-09-30 23:24:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:41,188 INFO L225 Difference]: With dead ends: 271 [2018-09-30 23:24:41,188 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 23:24:41,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:24:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 23:24:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 23:24:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 23:24:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2018-09-30 23:24:41,196 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 254 [2018-09-30 23:24:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:41,196 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2018-09-30 23:24:41,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:24:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2018-09-30 23:24:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-30 23:24:41,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:41,197 INFO L375 BasicCegarLoop]: trace histogram [121, 120, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:24:41,198 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:41,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:41,198 INFO L82 PathProgramCache]: Analyzing trace with hash -342281484, now seen corresponding path program 119 times [2018-09-30 23:24:41,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:41,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:41,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:41,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:41,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14538 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:46,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:46,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:46,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:47,280 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-09-30 23:24:47,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:47,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14538 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:47,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:47,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 23:24:47,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 23:24:47,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 23:24:47,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:24:47,367 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand 123 states. [2018-09-30 23:24:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:47,965 INFO L93 Difference]: Finished difference Result 273 states and 277 transitions. [2018-09-30 23:24:47,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:24:47,966 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 256 [2018-09-30 23:24:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:47,967 INFO L225 Difference]: With dead ends: 273 [2018-09-30 23:24:47,967 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:24:47,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:24:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:24:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 23:24:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:24:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2018-09-30 23:24:47,975 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 256 [2018-09-30 23:24:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:47,975 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2018-09-30 23:24:47,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 23:24:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2018-09-30 23:24:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 23:24:47,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:47,976 INFO L375 BasicCegarLoop]: trace histogram [122, 121, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:24:47,977 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:47,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash -908157456, now seen corresponding path program 120 times [2018-09-30 23:24:47,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:47,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:47,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:47,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:47,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14780 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:53,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:53,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:53,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:54,273 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 122 check-sat command(s) [2018-09-30 23:24:54,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:54,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14780 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:24:54,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:54,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 23:24:54,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:24:54,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:24:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:24:54,352 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand 124 states. [2018-09-30 23:24:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:55,020 INFO L93 Difference]: Finished difference Result 275 states and 279 transitions. [2018-09-30 23:24:55,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 23:24:55,020 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 258 [2018-09-30 23:24:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:55,021 INFO L225 Difference]: With dead ends: 275 [2018-09-30 23:24:55,021 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 23:24:55,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:24:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 23:24:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 23:24:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 23:24:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2018-09-30 23:24:55,028 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 258 [2018-09-30 23:24:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:55,028 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2018-09-30 23:24:55,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:24:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2018-09-30 23:24:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 23:24:55,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:55,029 INFO L375 BasicCegarLoop]: trace histogram [123, 122, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:24:55,029 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:55,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:55,029 INFO L82 PathProgramCache]: Analyzing trace with hash 745880044, now seen corresponding path program 121 times [2018-09-30 23:24:55,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:55,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:55,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:55,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:55,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15024 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:00,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:00,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:00,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:00,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15024 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:01,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:01,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 23:25:01,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 23:25:01,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 23:25:01,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:25:01,041 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand 125 states. [2018-09-30 23:25:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:01,445 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2018-09-30 23:25:01,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:25:01,445 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 260 [2018-09-30 23:25:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:01,446 INFO L225 Difference]: With dead ends: 277 [2018-09-30 23:25:01,446 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 23:25:01,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:25:01,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 23:25:01,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-30 23:25:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 23:25:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2018-09-30 23:25:01,453 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 260 [2018-09-30 23:25:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:01,453 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2018-09-30 23:25:01,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 23:25:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2018-09-30 23:25:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 23:25:01,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:01,454 INFO L375 BasicCegarLoop]: trace histogram [124, 123, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:25:01,455 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:01,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:01,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1138018024, now seen corresponding path program 122 times [2018-09-30 23:25:01,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:01,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:01,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:01,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:01,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15270 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:07,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:07,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:07,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:07,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:07,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:07,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15270 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:07,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:07,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 23:25:07,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:25:07,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:25:07,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:25:07,488 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand 126 states. [2018-09-30 23:25:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:08,138 INFO L93 Difference]: Finished difference Result 279 states and 283 transitions. [2018-09-30 23:25:08,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:25:08,138 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 262 [2018-09-30 23:25:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:08,139 INFO L225 Difference]: With dead ends: 279 [2018-09-30 23:25:08,139 INFO L226 Difference]: Without dead ends: 265 [2018-09-30 23:25:08,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:25:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-09-30 23:25:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-09-30 23:25:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 23:25:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-09-30 23:25:08,148 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 262 [2018-09-30 23:25:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:08,148 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-09-30 23:25:08,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:25:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-09-30 23:25:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-30 23:25:08,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:08,149 INFO L375 BasicCegarLoop]: trace histogram [125, 124, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:25:08,149 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:08,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:08,149 INFO L82 PathProgramCache]: Analyzing trace with hash 25494756, now seen corresponding path program 123 times [2018-09-30 23:25:08,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:08,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:08,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:08,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:08,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15518 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:14,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:14,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 23:25:14,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:14,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 125 check-sat command(s) [2018-09-30 23:25:14,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:14,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15518 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:15,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:15,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 23:25:15,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 23:25:15,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 23:25:15,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:25:15,015 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 127 states. [2018-09-30 23:25:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:15,674 INFO L93 Difference]: Finished difference Result 281 states and 285 transitions. [2018-09-30 23:25:15,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 23:25:15,675 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 264 [2018-09-30 23:25:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:15,676 INFO L225 Difference]: With dead ends: 281 [2018-09-30 23:25:15,676 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 23:25:15,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:25:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 23:25:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-30 23:25:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-30 23:25:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2018-09-30 23:25:15,683 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 264 [2018-09-30 23:25:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:15,684 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2018-09-30 23:25:15,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 23:25:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2018-09-30 23:25:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 23:25:15,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:15,685 INFO L375 BasicCegarLoop]: trace histogram [126, 125, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:25:15,685 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:15,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:15,685 INFO L82 PathProgramCache]: Analyzing trace with hash 337490912, now seen corresponding path program 124 times [2018-09-30 23:25:15,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:15,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:15,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:15,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:15,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15768 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:21,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:21,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:21,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:21,857 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:21,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:21,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15768 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:21,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:21,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 23:25:21,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:25:21,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:25:21,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:25:21,949 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand 128 states. [2018-09-30 23:25:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:22,729 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-09-30 23:25:22,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:25:22,730 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 266 [2018-09-30 23:25:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:22,731 INFO L225 Difference]: With dead ends: 283 [2018-09-30 23:25:22,731 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 23:25:22,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:25:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 23:25:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-09-30 23:25:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-30 23:25:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2018-09-30 23:25:22,740 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 266 [2018-09-30 23:25:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:22,740 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2018-09-30 23:25:22,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:25:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2018-09-30 23:25:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 23:25:22,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:22,741 INFO L375 BasicCegarLoop]: trace histogram [127, 126, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:25:22,742 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:22,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:22,742 INFO L82 PathProgramCache]: Analyzing trace with hash -481913892, now seen corresponding path program 125 times [2018-09-30 23:25:22,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:22,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:22,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:22,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:22,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:28,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:28,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:28,940 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:29,483 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 127 check-sat command(s) [2018-09-30 23:25:29,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:29,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:29,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:29,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 23:25:29,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 23:25:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 23:25:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:25:29,575 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand 129 states. [2018-09-30 23:25:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:30,245 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-09-30 23:25:30,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:25:30,246 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 268 [2018-09-30 23:25:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:30,247 INFO L225 Difference]: With dead ends: 285 [2018-09-30 23:25:30,247 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 23:25:30,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:25:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 23:25:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 23:25:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 23:25:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2018-09-30 23:25:30,255 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 268 [2018-09-30 23:25:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:30,255 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2018-09-30 23:25:30,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 23:25:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2018-09-30 23:25:30,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-30 23:25:30,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:30,256 INFO L375 BasicCegarLoop]: trace histogram [128, 127, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:25:30,257 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:30,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1950915368, now seen corresponding path program 126 times [2018-09-30 23:25:30,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:30,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:30,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:30,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:30,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16274 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:36,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:36,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:36,575 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:37,097 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 128 check-sat command(s) [2018-09-30 23:25:37,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:37,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16274 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:37,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:37,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 23:25:37,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:25:37,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:25:37,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:25:37,190 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand 130 states. [2018-09-30 23:25:37,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:37,746 INFO L93 Difference]: Finished difference Result 287 states and 291 transitions. [2018-09-30 23:25:37,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:25:37,746 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 270 [2018-09-30 23:25:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:37,747 INFO L225 Difference]: With dead ends: 287 [2018-09-30 23:25:37,747 INFO L226 Difference]: Without dead ends: 273 [2018-09-30 23:25:37,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:25:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-09-30 23:25:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-09-30 23:25:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-09-30 23:25:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2018-09-30 23:25:37,754 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 270 [2018-09-30 23:25:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:37,755 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2018-09-30 23:25:37,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:25:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2018-09-30 23:25:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 23:25:37,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:37,756 INFO L375 BasicCegarLoop]: trace histogram [129, 128, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:25:37,756 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:37,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:37,756 INFO L82 PathProgramCache]: Analyzing trace with hash -617093420, now seen corresponding path program 127 times [2018-09-30 23:25:37,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:37,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:37,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:37,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:37,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16530 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:44,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:44,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:44,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:44,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16530 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:44,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:44,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 23:25:44,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 23:25:44,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 23:25:44,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:25:44,390 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand 131 states. [2018-09-30 23:25:45,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:45,008 INFO L93 Difference]: Finished difference Result 289 states and 293 transitions. [2018-09-30 23:25:45,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:25:45,009 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 272 [2018-09-30 23:25:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:45,009 INFO L225 Difference]: With dead ends: 289 [2018-09-30 23:25:45,009 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 23:25:45,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:25:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 23:25:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-30 23:25:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 23:25:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2018-09-30 23:25:45,017 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 272 [2018-09-30 23:25:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:45,017 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2018-09-30 23:25:45,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 23:25:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2018-09-30 23:25:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-30 23:25:45,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:45,018 INFO L375 BasicCegarLoop]: trace histogram [130, 129, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:25:45,018 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:45,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1285544400, now seen corresponding path program 128 times [2018-09-30 23:25:45,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:45,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:45,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:45,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:45,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16788 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:51,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:51,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:51,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:51,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:51,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:51,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16788 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:51,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:51,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 23:25:51,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:25:51,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:25:51,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:25:51,799 INFO L87 Difference]: Start difference. First operand 275 states and 277 transitions. Second operand 132 states. [2018-09-30 23:25:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:52,541 INFO L93 Difference]: Finished difference Result 291 states and 295 transitions. [2018-09-30 23:25:52,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 23:25:52,541 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 274 [2018-09-30 23:25:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:52,542 INFO L225 Difference]: With dead ends: 291 [2018-09-30 23:25:52,542 INFO L226 Difference]: Without dead ends: 277 [2018-09-30 23:25:52,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:25:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-09-30 23:25:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-09-30 23:25:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-09-30 23:25:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 279 transitions. [2018-09-30 23:25:52,550 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 279 transitions. Word has length 274 [2018-09-30 23:25:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:52,550 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 279 transitions. [2018-09-30 23:25:52,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:25:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 279 transitions. [2018-09-30 23:25:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-30 23:25:52,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:52,551 INFO L375 BasicCegarLoop]: trace histogram [131, 130, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:25:52,551 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:52,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:52,551 INFO L82 PathProgramCache]: Analyzing trace with hash 64421324, now seen corresponding path program 129 times [2018-09-30 23:25:52,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:52,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:52,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:52,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:52,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17048 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:59,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:59,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:59,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:59,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 131 check-sat command(s) [2018-09-30 23:25:59,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:59,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17048 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:25:59,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:59,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 23:25:59,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 23:25:59,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 23:25:59,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:25:59,780 INFO L87 Difference]: Start difference. First operand 277 states and 279 transitions. Second operand 133 states. [2018-09-30 23:26:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:00,630 INFO L93 Difference]: Finished difference Result 293 states and 297 transitions. [2018-09-30 23:26:00,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 23:26:00,631 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 276 [2018-09-30 23:26:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:00,632 INFO L225 Difference]: With dead ends: 293 [2018-09-30 23:26:00,632 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 23:26:00,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:26:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 23:26:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-30 23:26:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-30 23:26:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2018-09-30 23:26:00,640 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 276 [2018-09-30 23:26:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:00,640 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2018-09-30 23:26:00,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 23:26:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2018-09-30 23:26:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 23:26:00,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:00,641 INFO L375 BasicCegarLoop]: trace histogram [132, 131, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:26:00,641 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:00,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash -908782904, now seen corresponding path program 130 times [2018-09-30 23:26:00,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:00,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:00,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:00,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:00,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17310 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:07,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:07,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:07,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:07,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:07,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:07,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17310 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:07,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:07,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 23:26:07,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:26:07,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:26:07,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:26:07,628 INFO L87 Difference]: Start difference. First operand 279 states and 281 transitions. Second operand 134 states. [2018-09-30 23:26:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:08,367 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2018-09-30 23:26:08,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:26:08,367 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 278 [2018-09-30 23:26:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:08,368 INFO L225 Difference]: With dead ends: 295 [2018-09-30 23:26:08,368 INFO L226 Difference]: Without dead ends: 281 [2018-09-30 23:26:08,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:26:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-09-30 23:26:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-09-30 23:26:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-09-30 23:26:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2018-09-30 23:26:08,380 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 278 [2018-09-30 23:26:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:08,381 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2018-09-30 23:26:08,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:26:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2018-09-30 23:26:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-09-30 23:26:08,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:08,382 INFO L375 BasicCegarLoop]: trace histogram [133, 132, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:26:08,382 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:08,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash 144824516, now seen corresponding path program 131 times [2018-09-30 23:26:08,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:08,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:08,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:08,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:08,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17574 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:15,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:15,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:15,092 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:15,639 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 133 check-sat command(s) [2018-09-30 23:26:15,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:15,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17574 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:15,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:15,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 23:26:15,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 23:26:15,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 23:26:15,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:26:15,736 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand 135 states. [2018-09-30 23:26:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:16,417 INFO L93 Difference]: Finished difference Result 297 states and 301 transitions. [2018-09-30 23:26:16,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:26:16,417 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 280 [2018-09-30 23:26:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:16,418 INFO L225 Difference]: With dead ends: 297 [2018-09-30 23:26:16,418 INFO L226 Difference]: Without dead ends: 283 [2018-09-30 23:26:16,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:26:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-30 23:26:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-30 23:26:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-30 23:26:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2018-09-30 23:26:16,428 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 280 [2018-09-30 23:26:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:16,428 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2018-09-30 23:26:16,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 23:26:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2018-09-30 23:26:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-30 23:26:16,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:16,429 INFO L375 BasicCegarLoop]: trace histogram [134, 133, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:26:16,429 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:16,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash -950726720, now seen corresponding path program 132 times [2018-09-30 23:26:16,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:16,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:16,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:16,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:16,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17840 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:23,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:23,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:23,146 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:23,719 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 134 check-sat command(s) [2018-09-30 23:26:23,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:23,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17840 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:23,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:23,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 23:26:23,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:26:23,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:26:23,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:26:23,816 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand 136 states. [2018-09-30 23:26:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:24,430 INFO L93 Difference]: Finished difference Result 299 states and 303 transitions. [2018-09-30 23:26:24,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 23:26:24,431 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 282 [2018-09-30 23:26:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:24,432 INFO L225 Difference]: With dead ends: 299 [2018-09-30 23:26:24,432 INFO L226 Difference]: Without dead ends: 285 [2018-09-30 23:26:24,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:26:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-09-30 23:26:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-09-30 23:26:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-09-30 23:26:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2018-09-30 23:26:24,439 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 282 [2018-09-30 23:26:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:24,439 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2018-09-30 23:26:24,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:26:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2018-09-30 23:26:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-09-30 23:26:24,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:24,440 INFO L375 BasicCegarLoop]: trace histogram [135, 134, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:26:24,440 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:24,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1508476996, now seen corresponding path program 133 times [2018-09-30 23:26:24,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:24,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:24,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:24,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:24,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:31,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:31,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:31,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:31,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:31,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:31,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 23:26:31,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 23:26:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 23:26:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:26:31,910 INFO L87 Difference]: Start difference. First operand 285 states and 287 transitions. Second operand 137 states. [2018-09-30 23:26:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:32,760 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-09-30 23:26:32,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 23:26:32,761 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 284 [2018-09-30 23:26:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:32,761 INFO L225 Difference]: With dead ends: 301 [2018-09-30 23:26:32,761 INFO L226 Difference]: Without dead ends: 287 [2018-09-30 23:26:32,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:26:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-30 23:26:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-30 23:26:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-30 23:26:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2018-09-30 23:26:32,770 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 284 [2018-09-30 23:26:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:32,770 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2018-09-30 23:26:32,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 23:26:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2018-09-30 23:26:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-30 23:26:32,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:32,771 INFO L375 BasicCegarLoop]: trace histogram [136, 135, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:26:32,771 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:32,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash -635580232, now seen corresponding path program 134 times [2018-09-30 23:26:32,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:32,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:32,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:32,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:32,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18378 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:39,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:39,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:39,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:39,875 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:39,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:39,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18378 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:39,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:39,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 23:26:39,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:26:39,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:26:39,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:26:39,974 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand 138 states. [2018-09-30 23:26:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:40,466 INFO L93 Difference]: Finished difference Result 303 states and 307 transitions. [2018-09-30 23:26:40,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 23:26:40,470 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 286 [2018-09-30 23:26:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:40,470 INFO L225 Difference]: With dead ends: 303 [2018-09-30 23:26:40,471 INFO L226 Difference]: Without dead ends: 289 [2018-09-30 23:26:40,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:26:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-09-30 23:26:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-09-30 23:26:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-09-30 23:26:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 291 transitions. [2018-09-30 23:26:40,479 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 291 transitions. Word has length 286 [2018-09-30 23:26:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:40,479 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 291 transitions. [2018-09-30 23:26:40,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:26:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 291 transitions. [2018-09-30 23:26:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-30 23:26:40,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:40,480 INFO L375 BasicCegarLoop]: trace histogram [137, 136, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:26:40,480 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:40,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash 699587252, now seen corresponding path program 135 times [2018-09-30 23:26:40,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:40,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:40,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:40,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:40,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18650 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:47,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:47,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:47,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:48,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 137 check-sat command(s) [2018-09-30 23:26:48,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:48,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18650 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:48,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:48,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 23:26:48,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 23:26:48,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 23:26:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:26:48,671 INFO L87 Difference]: Start difference. First operand 289 states and 291 transitions. Second operand 139 states. [2018-09-30 23:26:49,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:49,606 INFO L93 Difference]: Finished difference Result 305 states and 309 transitions. [2018-09-30 23:26:49,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 23:26:49,607 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 288 [2018-09-30 23:26:49,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:49,607 INFO L225 Difference]: With dead ends: 305 [2018-09-30 23:26:49,607 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 23:26:49,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:26:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 23:26:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-30 23:26:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-30 23:26:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 293 transitions. [2018-09-30 23:26:49,615 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 293 transitions. Word has length 288 [2018-09-30 23:26:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:49,616 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 293 transitions. [2018-09-30 23:26:49,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 23:26:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 293 transitions. [2018-09-30 23:26:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-30 23:26:49,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:49,617 INFO L375 BasicCegarLoop]: trace histogram [138, 137, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:26:49,617 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:49,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:49,617 INFO L82 PathProgramCache]: Analyzing trace with hash -399682128, now seen corresponding path program 136 times [2018-09-30 23:26:49,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:49,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:49,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:49,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:49,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18924 backedges. 0 proven. 18906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:57,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:57,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:57,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:57,241 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:57,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:57,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18924 backedges. 0 proven. 18906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:26:57,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:57,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 23:26:57,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 23:26:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 23:26:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:26:57,341 INFO L87 Difference]: Start difference. First operand 291 states and 293 transitions. Second operand 140 states. [2018-09-30 23:26:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:57,808 INFO L93 Difference]: Finished difference Result 307 states and 311 transitions. [2018-09-30 23:26:57,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 23:26:57,808 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 290 [2018-09-30 23:26:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:57,809 INFO L225 Difference]: With dead ends: 307 [2018-09-30 23:26:57,809 INFO L226 Difference]: Without dead ends: 293 [2018-09-30 23:26:57,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:26:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-09-30 23:26:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-09-30 23:26:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-09-30 23:26:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2018-09-30 23:26:57,821 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 290 [2018-09-30 23:26:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:57,821 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2018-09-30 23:26:57,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 23:26:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2018-09-30 23:26:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-30 23:26:57,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:57,822 INFO L375 BasicCegarLoop]: trace histogram [139, 138, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:26:57,823 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:57,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:57,823 INFO L82 PathProgramCache]: Analyzing trace with hash -235601492, now seen corresponding path program 137 times [2018-09-30 23:26:57,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:57,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:57,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:57,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:57,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19200 backedges. 0 proven. 19182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:05,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:05,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:05,160 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:27:05,778 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 139 check-sat command(s) [2018-09-30 23:27:05,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:05,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19200 backedges. 0 proven. 19182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:05,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:05,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-30 23:27:05,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-30 23:27:05,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-30 23:27:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:27:05,882 INFO L87 Difference]: Start difference. First operand 293 states and 295 transitions. Second operand 141 states. [2018-09-30 23:27:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:06,815 INFO L93 Difference]: Finished difference Result 309 states and 313 transitions. [2018-09-30 23:27:06,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 23:27:06,815 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 292 [2018-09-30 23:27:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:06,816 INFO L225 Difference]: With dead ends: 309 [2018-09-30 23:27:06,816 INFO L226 Difference]: Without dead ends: 295 [2018-09-30 23:27:06,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:27:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-30 23:27:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-09-30 23:27:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-30 23:27:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2018-09-30 23:27:06,829 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 292 [2018-09-30 23:27:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:06,829 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2018-09-30 23:27:06,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-30 23:27:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2018-09-30 23:27:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-30 23:27:06,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:06,831 INFO L375 BasicCegarLoop]: trace histogram [140, 139, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:27:06,831 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:06,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:06,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1467900248, now seen corresponding path program 138 times [2018-09-30 23:27:06,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:06,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:06,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:06,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:06,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 19478 backedges. 0 proven. 19460 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:14,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:14,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:14,185 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:27:14,801 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 140 check-sat command(s) [2018-09-30 23:27:14,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:14,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19478 backedges. 0 proven. 19460 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:14,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:14,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 23:27:14,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:27:14,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:27:14,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:27:14,908 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand 142 states. [2018-09-30 23:27:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:15,848 INFO L93 Difference]: Finished difference Result 311 states and 315 transitions. [2018-09-30 23:27:15,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 23:27:15,849 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 294 [2018-09-30 23:27:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:15,850 INFO L225 Difference]: With dead ends: 311 [2018-09-30 23:27:15,850 INFO L226 Difference]: Without dead ends: 297 [2018-09-30 23:27:15,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:27:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-09-30 23:27:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2018-09-30 23:27:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-09-30 23:27:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 299 transitions. [2018-09-30 23:27:15,859 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 299 transitions. Word has length 294 [2018-09-30 23:27:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:15,859 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 299 transitions. [2018-09-30 23:27:15,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:27:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 299 transitions. [2018-09-30 23:27:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-09-30 23:27:15,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:15,860 INFO L375 BasicCegarLoop]: trace histogram [141, 140, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:27:15,861 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:15,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash -296031068, now seen corresponding path program 139 times [2018-09-30 23:27:15,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:15,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:15,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:15,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:15,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19758 backedges. 0 proven. 19740 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:23,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:23,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:23,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:23,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 19758 backedges. 0 proven. 19740 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:23,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:23,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-30 23:27:23,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 23:27:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 23:27:23,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:27:23,804 INFO L87 Difference]: Start difference. First operand 297 states and 299 transitions. Second operand 143 states. [2018-09-30 23:27:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:24,291 INFO L93 Difference]: Finished difference Result 313 states and 317 transitions. [2018-09-30 23:27:24,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 23:27:24,292 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 296 [2018-09-30 23:27:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:24,293 INFO L225 Difference]: With dead ends: 313 [2018-09-30 23:27:24,293 INFO L226 Difference]: Without dead ends: 299 [2018-09-30 23:27:24,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:27:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-30 23:27:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-30 23:27:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-30 23:27:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 301 transitions. [2018-09-30 23:27:24,301 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 301 transitions. Word has length 296 [2018-09-30 23:27:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:24,301 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 301 transitions. [2018-09-30 23:27:24,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 23:27:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 301 transitions. [2018-09-30 23:27:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-30 23:27:24,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:24,302 INFO L375 BasicCegarLoop]: trace histogram [142, 141, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:27:24,302 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:24,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:24,302 INFO L82 PathProgramCache]: Analyzing trace with hash 588819360, now seen corresponding path program 140 times [2018-09-30 23:27:24,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:24,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:24,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:24,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:24,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20040 backedges. 0 proven. 20022 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:31,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:31,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:31,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:27:32,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:27:32,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:32,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20040 backedges. 0 proven. 20022 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:32,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:32,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 23:27:32,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 23:27:32,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 23:27:32,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:27:32,183 INFO L87 Difference]: Start difference. First operand 299 states and 301 transitions. Second operand 144 states. [2018-09-30 23:27:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:33,215 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-09-30 23:27:33,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 23:27:33,216 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 298 [2018-09-30 23:27:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:33,216 INFO L225 Difference]: With dead ends: 315 [2018-09-30 23:27:33,216 INFO L226 Difference]: Without dead ends: 301 [2018-09-30 23:27:33,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:27:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-09-30 23:27:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-09-30 23:27:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-30 23:27:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 303 transitions. [2018-09-30 23:27:33,225 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 303 transitions. Word has length 298 [2018-09-30 23:27:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:33,226 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 303 transitions. [2018-09-30 23:27:33,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 23:27:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 303 transitions. [2018-09-30 23:27:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-09-30 23:27:33,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:33,227 INFO L375 BasicCegarLoop]: trace histogram [143, 142, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:27:33,227 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:33,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:33,228 INFO L82 PathProgramCache]: Analyzing trace with hash 526556060, now seen corresponding path program 141 times [2018-09-30 23:27:33,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:33,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:33,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:33,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:33,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20324 backedges. 0 proven. 20306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:41,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:41,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:41,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:27:41,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 143 check-sat command(s) [2018-09-30 23:27:41,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:41,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20324 backedges. 0 proven. 20306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:41,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:41,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-30 23:27:41,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-30 23:27:41,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-30 23:27:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:27:41,857 INFO L87 Difference]: Start difference. First operand 301 states and 303 transitions. Second operand 145 states. [2018-09-30 23:27:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:42,925 INFO L93 Difference]: Finished difference Result 317 states and 321 transitions. [2018-09-30 23:27:42,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 23:27:42,925 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 300 [2018-09-30 23:27:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:42,926 INFO L225 Difference]: With dead ends: 317 [2018-09-30 23:27:42,926 INFO L226 Difference]: Without dead ends: 303 [2018-09-30 23:27:42,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:27:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-30 23:27:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-09-30 23:27:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-30 23:27:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 305 transitions. [2018-09-30 23:27:42,935 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 305 transitions. Word has length 300 [2018-09-30 23:27:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:42,935 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 305 transitions. [2018-09-30 23:27:42,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-30 23:27:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 305 transitions. [2018-09-30 23:27:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-30 23:27:42,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:42,937 INFO L375 BasicCegarLoop]: trace histogram [144, 143, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:27:42,937 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:42,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash 821066904, now seen corresponding path program 142 times [2018-09-30 23:27:42,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:42,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:42,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:42,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:42,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20610 backedges. 0 proven. 20592 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:50,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:50,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:50,768 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:50,994 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:50,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:51,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20610 backedges. 0 proven. 20592 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:27:51,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:51,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 23:27:51,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 23:27:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 23:27:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:27:51,101 INFO L87 Difference]: Start difference. First operand 303 states and 305 transitions. Second operand 146 states. [2018-09-30 23:27:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:52,341 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-09-30 23:27:52,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 23:27:52,342 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 302 [2018-09-30 23:27:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:52,343 INFO L225 Difference]: With dead ends: 319 [2018-09-30 23:27:52,343 INFO L226 Difference]: Without dead ends: 305 [2018-09-30 23:27:52,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:27:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-09-30 23:27:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2018-09-30 23:27:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-09-30 23:27:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 307 transitions. [2018-09-30 23:27:52,356 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 307 transitions. Word has length 302 [2018-09-30 23:27:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:52,357 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 307 transitions. [2018-09-30 23:27:52,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 23:27:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 307 transitions. [2018-09-30 23:27:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-09-30 23:27:52,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:52,358 INFO L375 BasicCegarLoop]: trace histogram [145, 144, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:27:52,358 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:52,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash 378146452, now seen corresponding path program 143 times [2018-09-30 23:27:52,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:52,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:52,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:52,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:52,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20898 backedges. 0 proven. 20880 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:00,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:00,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:00,465 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:28:01,150 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 145 check-sat command(s) [2018-09-30 23:28:01,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:01,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20898 backedges. 0 proven. 20880 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:01,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:01,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-30 23:28:01,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 23:28:01,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 23:28:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:28:01,259 INFO L87 Difference]: Start difference. First operand 305 states and 307 transitions. Second operand 147 states. [2018-09-30 23:28:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:02,434 INFO L93 Difference]: Finished difference Result 321 states and 325 transitions. [2018-09-30 23:28:02,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 23:28:02,434 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 304 [2018-09-30 23:28:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:02,435 INFO L225 Difference]: With dead ends: 321 [2018-09-30 23:28:02,435 INFO L226 Difference]: Without dead ends: 307 [2018-09-30 23:28:02,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:28:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-30 23:28:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-09-30 23:28:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-30 23:28:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 309 transitions. [2018-09-30 23:28:02,444 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 309 transitions. Word has length 304 [2018-09-30 23:28:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:02,445 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 309 transitions. [2018-09-30 23:28:02,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 23:28:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 309 transitions. [2018-09-30 23:28:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-30 23:28:02,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:02,446 INFO L375 BasicCegarLoop]: trace histogram [146, 145, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:28:02,446 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:02,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:02,446 INFO L82 PathProgramCache]: Analyzing trace with hash -66645616, now seen corresponding path program 144 times [2018-09-30 23:28:02,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:02,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:02,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:02,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:02,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21188 backedges. 0 proven. 21170 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:10,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:10,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:10,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:28:11,196 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 146 check-sat command(s) [2018-09-30 23:28:11,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:11,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21188 backedges. 0 proven. 21170 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:11,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:11,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 23:28:11,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 23:28:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 23:28:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:28:11,305 INFO L87 Difference]: Start difference. First operand 307 states and 309 transitions. Second operand 148 states. [2018-09-30 23:28:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:12,461 INFO L93 Difference]: Finished difference Result 323 states and 327 transitions. [2018-09-30 23:28:12,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 23:28:12,462 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 306 [2018-09-30 23:28:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:12,462 INFO L225 Difference]: With dead ends: 323 [2018-09-30 23:28:12,463 INFO L226 Difference]: Without dead ends: 309 [2018-09-30 23:28:12,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:28:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-09-30 23:28:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2018-09-30 23:28:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-09-30 23:28:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 311 transitions. [2018-09-30 23:28:12,471 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 311 transitions. Word has length 306 [2018-09-30 23:28:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:12,471 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 311 transitions. [2018-09-30 23:28:12,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 23:28:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 311 transitions. [2018-09-30 23:28:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-30 23:28:12,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:12,472 INFO L375 BasicCegarLoop]: trace histogram [147, 146, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:28:12,472 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:12,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:12,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1984906636, now seen corresponding path program 145 times [2018-09-30 23:28:12,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:12,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:12,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:12,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:12,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21480 backedges. 0 proven. 21462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:20,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:20,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:20,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:21,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21480 backedges. 0 proven. 21462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:21,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:21,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-30 23:28:21,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 23:28:21,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 23:28:21,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:28:21,199 INFO L87 Difference]: Start difference. First operand 309 states and 311 transitions. Second operand 149 states. [2018-09-30 23:28:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:22,324 INFO L93 Difference]: Finished difference Result 325 states and 329 transitions. [2018-09-30 23:28:22,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 23:28:22,325 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 308 [2018-09-30 23:28:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:22,325 INFO L225 Difference]: With dead ends: 325 [2018-09-30 23:28:22,325 INFO L226 Difference]: Without dead ends: 311 [2018-09-30 23:28:22,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:28:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-30 23:28:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-09-30 23:28:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-30 23:28:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 313 transitions. [2018-09-30 23:28:22,335 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 313 transitions. Word has length 308 [2018-09-30 23:28:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:22,335 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 313 transitions. [2018-09-30 23:28:22,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 23:28:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 313 transitions. [2018-09-30 23:28:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-30 23:28:22,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:22,336 INFO L375 BasicCegarLoop]: trace histogram [148, 147, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:28:22,336 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:22,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:22,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2136631944, now seen corresponding path program 146 times [2018-09-30 23:28:22,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:22,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:22,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:22,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:22,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 21774 backedges. 0 proven. 21756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:30,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:30,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:30,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:28:31,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:28:31,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:31,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21774 backedges. 0 proven. 21756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:31,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:31,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 23:28:31,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:28:31,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:28:31,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:28:31,209 INFO L87 Difference]: Start difference. First operand 311 states and 313 transitions. Second operand 150 states. [2018-09-30 23:28:32,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:32,302 INFO L93 Difference]: Finished difference Result 327 states and 331 transitions. [2018-09-30 23:28:32,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 23:28:32,302 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 310 [2018-09-30 23:28:32,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:32,303 INFO L225 Difference]: With dead ends: 327 [2018-09-30 23:28:32,303 INFO L226 Difference]: Without dead ends: 313 [2018-09-30 23:28:32,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:28:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-09-30 23:28:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-09-30 23:28:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-09-30 23:28:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 315 transitions. [2018-09-30 23:28:32,312 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 315 transitions. Word has length 310 [2018-09-30 23:28:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:32,312 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 315 transitions. [2018-09-30 23:28:32,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:28:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 315 transitions. [2018-09-30 23:28:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-09-30 23:28:32,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:32,313 INFO L375 BasicCegarLoop]: trace histogram [149, 148, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:28:32,313 INFO L423 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:32,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:32,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1915764868, now seen corresponding path program 147 times [2018-09-30 23:28:32,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:32,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:32,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:32,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:32,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22070 backedges. 0 proven. 22052 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:41,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:41,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:41,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:28:41,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 149 check-sat command(s) [2018-09-30 23:28:41,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:41,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22070 backedges. 0 proven. 22052 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:42,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:42,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-30 23:28:42,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-30 23:28:42,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-30 23:28:42,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:28:42,047 INFO L87 Difference]: Start difference. First operand 313 states and 315 transitions. Second operand 151 states. [2018-09-30 23:28:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:42,960 INFO L93 Difference]: Finished difference Result 329 states and 333 transitions. [2018-09-30 23:28:42,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 23:28:42,960 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 312 [2018-09-30 23:28:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:42,962 INFO L225 Difference]: With dead ends: 329 [2018-09-30 23:28:42,962 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 23:28:42,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:28:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 23:28:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-09-30 23:28:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-30 23:28:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2018-09-30 23:28:42,976 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 312 [2018-09-30 23:28:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:42,976 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2018-09-30 23:28:42,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-30 23:28:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2018-09-30 23:28:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-30 23:28:42,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:42,978 INFO L375 BasicCegarLoop]: trace histogram [150, 149, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:28:42,978 INFO L423 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:42,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash 115902336, now seen corresponding path program 148 times [2018-09-30 23:28:42,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:42,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:42,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:42,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:42,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22368 backedges. 0 proven. 22350 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:51,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:51,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:51,844 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:28:52,054 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:28:52,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:52,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 22368 backedges. 0 proven. 22350 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:28:52,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:52,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 23:28:52,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 23:28:52,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 23:28:52,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:28:52,165 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand 152 states. [2018-09-30 23:28:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:52,781 INFO L93 Difference]: Finished difference Result 331 states and 335 transitions. [2018-09-30 23:28:52,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-30 23:28:52,782 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 314 [2018-09-30 23:28:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:52,783 INFO L225 Difference]: With dead ends: 331 [2018-09-30 23:28:52,783 INFO L226 Difference]: Without dead ends: 317 [2018-09-30 23:28:52,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:28:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-09-30 23:28:52,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2018-09-30 23:28:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-09-30 23:28:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 319 transitions. [2018-09-30 23:28:52,792 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 319 transitions. Word has length 314 [2018-09-30 23:28:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:52,793 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 319 transitions. [2018-09-30 23:28:52,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 23:28:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 319 transitions. [2018-09-30 23:28:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-09-30 23:28:52,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:52,794 INFO L375 BasicCegarLoop]: trace histogram [151, 150, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:28:52,794 INFO L423 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:52,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:52,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1319829372, now seen corresponding path program 149 times [2018-09-30 23:28:52,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:52,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:52,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:52,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:52,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22668 backedges. 0 proven. 22650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:01,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:01,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:01,744 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:29:02,498 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 151 check-sat command(s) [2018-09-30 23:29:02,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:02,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22668 backedges. 0 proven. 22650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:02,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:02,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2018-09-30 23:29:02,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-09-30 23:29:02,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-09-30 23:29:02,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-09-30 23:29:02,616 INFO L87 Difference]: Start difference. First operand 317 states and 319 transitions. Second operand 153 states. [2018-09-30 23:29:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:04,061 INFO L93 Difference]: Finished difference Result 333 states and 337 transitions. [2018-09-30 23:29:04,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-09-30 23:29:04,061 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 316 [2018-09-30 23:29:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:04,062 INFO L225 Difference]: With dead ends: 333 [2018-09-30 23:29:04,062 INFO L226 Difference]: Without dead ends: 319 [2018-09-30 23:29:04,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-09-30 23:29:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-30 23:29:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-09-30 23:29:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-30 23:29:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 321 transitions. [2018-09-30 23:29:04,074 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 321 transitions. Word has length 316 [2018-09-30 23:29:04,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:04,075 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 321 transitions. [2018-09-30 23:29:04,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-09-30 23:29:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 321 transitions. [2018-09-30 23:29:04,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-30 23:29:04,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:04,076 INFO L375 BasicCegarLoop]: trace histogram [152, 151, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:29:04,077 INFO L423 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:04,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:04,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1347458952, now seen corresponding path program 150 times [2018-09-30 23:29:04,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:04,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:04,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:04,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:04,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22970 backedges. 0 proven. 22952 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:13,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:13,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:13,053 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:29:13,774 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 152 check-sat command(s) [2018-09-30 23:29:13,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:13,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22970 backedges. 0 proven. 22952 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:13,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:13,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-09-30 23:29:13,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:29:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:29:13,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:29:13,890 INFO L87 Difference]: Start difference. First operand 319 states and 321 transitions. Second operand 154 states. [2018-09-30 23:29:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:15,175 INFO L93 Difference]: Finished difference Result 335 states and 339 transitions. [2018-09-30 23:29:15,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-30 23:29:15,175 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 318 [2018-09-30 23:29:15,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:15,176 INFO L225 Difference]: With dead ends: 335 [2018-09-30 23:29:15,176 INFO L226 Difference]: Without dead ends: 321 [2018-09-30 23:29:15,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:29:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-09-30 23:29:15,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2018-09-30 23:29:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2018-09-30 23:29:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 323 transitions. [2018-09-30 23:29:15,185 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 323 transitions. Word has length 318 [2018-09-30 23:29:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:15,185 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 323 transitions. [2018-09-30 23:29:15,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:29:15,186 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 323 transitions. [2018-09-30 23:29:15,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-09-30 23:29:15,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:15,187 INFO L375 BasicCegarLoop]: trace histogram [153, 152, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:29:15,187 INFO L423 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:15,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:15,187 INFO L82 PathProgramCache]: Analyzing trace with hash -516062604, now seen corresponding path program 151 times [2018-09-30 23:29:15,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:15,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:15,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:15,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:15,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 23274 backedges. 0 proven. 23256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:24,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:24,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:24,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:24,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 23274 backedges. 0 proven. 23256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:24,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:24,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2018-09-30 23:29:24,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-30 23:29:24,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-30 23:29:24,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:29:24,567 INFO L87 Difference]: Start difference. First operand 321 states and 323 transitions. Second operand 155 states. [2018-09-30 23:29:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:25,460 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-09-30 23:29:25,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 23:29:25,461 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 320 [2018-09-30 23:29:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:25,461 INFO L225 Difference]: With dead ends: 337 [2018-09-30 23:29:25,462 INFO L226 Difference]: Without dead ends: 323 [2018-09-30 23:29:25,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:29:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-30 23:29:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-09-30 23:29:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-09-30 23:29:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 325 transitions. [2018-09-30 23:29:25,470 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 325 transitions. Word has length 320 [2018-09-30 23:29:25,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:25,471 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 325 transitions. [2018-09-30 23:29:25,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-30 23:29:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 325 transitions. [2018-09-30 23:29:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-30 23:29:25,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:25,472 INFO L375 BasicCegarLoop]: trace histogram [154, 153, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:29:25,472 INFO L423 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:25,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:25,472 INFO L82 PathProgramCache]: Analyzing trace with hash -408089232, now seen corresponding path program 152 times [2018-09-30 23:29:25,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:25,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:25,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:25,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:25,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 23580 backedges. 0 proven. 23562 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:34,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:34,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:34,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:29:34,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:29:34,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:34,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 23580 backedges. 0 proven. 23562 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:34,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:34,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-09-30 23:29:34,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 23:29:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 23:29:34,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:29:34,732 INFO L87 Difference]: Start difference. First operand 323 states and 325 transitions. Second operand 156 states. [2018-09-30 23:29:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:35,939 INFO L93 Difference]: Finished difference Result 339 states and 343 transitions. [2018-09-30 23:29:35,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-09-30 23:29:35,939 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 322 [2018-09-30 23:29:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:35,940 INFO L225 Difference]: With dead ends: 339 [2018-09-30 23:29:35,940 INFO L226 Difference]: Without dead ends: 325 [2018-09-30 23:29:35,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:29:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-09-30 23:29:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2018-09-30 23:29:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-09-30 23:29:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 327 transitions. [2018-09-30 23:29:35,954 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 327 transitions. Word has length 322 [2018-09-30 23:29:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:35,954 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 327 transitions. [2018-09-30 23:29:35,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 23:29:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 327 transitions. [2018-09-30 23:29:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-09-30 23:29:35,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:35,956 INFO L375 BasicCegarLoop]: trace histogram [155, 154, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:29:35,956 INFO L423 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:35,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:35,956 INFO L82 PathProgramCache]: Analyzing trace with hash 275106156, now seen corresponding path program 153 times [2018-09-30 23:29:35,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:35,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:35,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:35,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:35,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 23888 backedges. 0 proven. 23870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:45,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:45,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:45,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:29:45,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 155 check-sat command(s) [2018-09-30 23:29:45,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:45,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 23888 backedges. 0 proven. 23870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:46,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:46,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 156 [2018-09-30 23:29:46,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-09-30 23:29:46,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-09-30 23:29:46,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:29:46,106 INFO L87 Difference]: Start difference. First operand 325 states and 327 transitions. Second operand 157 states. [2018-09-30 23:29:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:47,170 INFO L93 Difference]: Finished difference Result 341 states and 345 transitions. [2018-09-30 23:29:47,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-09-30 23:29:47,171 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 324 [2018-09-30 23:29:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:47,172 INFO L225 Difference]: With dead ends: 341 [2018-09-30 23:29:47,172 INFO L226 Difference]: Without dead ends: 327 [2018-09-30 23:29:47,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:29:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-30 23:29:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-09-30 23:29:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-09-30 23:29:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 329 transitions. [2018-09-30 23:29:47,181 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 329 transitions. Word has length 324 [2018-09-30 23:29:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:47,181 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 329 transitions. [2018-09-30 23:29:47,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-09-30 23:29:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 329 transitions. [2018-09-30 23:29:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-30 23:29:47,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:47,183 INFO L375 BasicCegarLoop]: trace histogram [156, 155, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:29:47,183 INFO L423 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:47,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:47,183 INFO L82 PathProgramCache]: Analyzing trace with hash -304122264, now seen corresponding path program 154 times [2018-09-30 23:29:47,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:47,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:47,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:47,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:47,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24198 backedges. 0 proven. 24180 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:56,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:56,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:56,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:57,037 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:57,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:57,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 24198 backedges. 0 proven. 24180 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:29:57,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:57,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-09-30 23:29:57,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 23:29:57,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 23:29:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:29:57,154 INFO L87 Difference]: Start difference. First operand 327 states and 329 transitions. Second operand 158 states. [2018-09-30 23:29:58,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:58,256 INFO L93 Difference]: Finished difference Result 343 states and 347 transitions. [2018-09-30 23:29:58,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-09-30 23:29:58,256 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 326 [2018-09-30 23:29:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:58,257 INFO L225 Difference]: With dead ends: 343 [2018-09-30 23:29:58,257 INFO L226 Difference]: Without dead ends: 329 [2018-09-30 23:29:58,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:29:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-09-30 23:29:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2018-09-30 23:29:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-09-30 23:29:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 331 transitions. [2018-09-30 23:29:58,267 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 331 transitions. Word has length 326 [2018-09-30 23:29:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:58,267 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 331 transitions. [2018-09-30 23:29:58,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 23:29:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 331 transitions. [2018-09-30 23:29:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-30 23:29:58,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:58,269 INFO L375 BasicCegarLoop]: trace histogram [157, 156, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:29:58,269 INFO L423 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:58,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1403114596, now seen corresponding path program 155 times [2018-09-30 23:29:58,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:58,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:58,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:58,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:58,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24510 backedges. 0 proven. 24492 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:07,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:07,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:07,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:30:08,305 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-09-30 23:30:08,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:08,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 24510 backedges. 0 proven. 24492 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:08,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:08,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 158 [2018-09-30 23:30:08,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-09-30 23:30:08,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-09-30 23:30:08,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:30:08,453 INFO L87 Difference]: Start difference. First operand 329 states and 331 transitions. Second operand 159 states. [2018-09-30 23:30:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:09,882 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-09-30 23:30:09,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-09-30 23:30:09,883 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 328 [2018-09-30 23:30:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:09,884 INFO L225 Difference]: With dead ends: 345 [2018-09-30 23:30:09,884 INFO L226 Difference]: Without dead ends: 331 [2018-09-30 23:30:09,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:30:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-30 23:30:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-09-30 23:30:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-09-30 23:30:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 333 transitions. [2018-09-30 23:30:09,893 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 333 transitions. Word has length 328 [2018-09-30 23:30:09,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:09,893 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 333 transitions. [2018-09-30 23:30:09,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-09-30 23:30:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 333 transitions. [2018-09-30 23:30:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-30 23:30:09,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:09,895 INFO L375 BasicCegarLoop]: trace histogram [158, 157, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:30:09,895 INFO L423 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:09,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:09,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1380229984, now seen corresponding path program 156 times [2018-09-30 23:30:09,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:09,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:09,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:09,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:09,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24824 backedges. 0 proven. 24806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:19,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:19,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:19,440 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:30:20,218 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-09-30 23:30:20,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:20,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24824 backedges. 0 proven. 24806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:20,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:20,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-09-30 23:30:20,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 23:30:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 23:30:20,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:30:20,340 INFO L87 Difference]: Start difference. First operand 331 states and 333 transitions. Second operand 160 states. [2018-09-30 23:30:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:21,288 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2018-09-30 23:30:21,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-09-30 23:30:21,288 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 330 [2018-09-30 23:30:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:21,289 INFO L225 Difference]: With dead ends: 347 [2018-09-30 23:30:21,289 INFO L226 Difference]: Without dead ends: 333 [2018-09-30 23:30:21,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:30:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-09-30 23:30:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2018-09-30 23:30:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-09-30 23:30:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 335 transitions. [2018-09-30 23:30:21,298 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 335 transitions. Word has length 330 [2018-09-30 23:30:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:21,298 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 335 transitions. [2018-09-30 23:30:21,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 23:30:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 335 transitions. [2018-09-30 23:30:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-09-30 23:30:21,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:21,299 INFO L375 BasicCegarLoop]: trace histogram [159, 158, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:30:21,300 INFO L423 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:21,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:21,300 INFO L82 PathProgramCache]: Analyzing trace with hash 862954332, now seen corresponding path program 157 times [2018-09-30 23:30:21,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:21,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:21,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:21,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:21,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25140 backedges. 0 proven. 25122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:30,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:30,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:30,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:31,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25140 backedges. 0 proven. 25122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:31,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:31,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 160 [2018-09-30 23:30:31,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-09-30 23:30:31,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-09-30 23:30:31,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:30:31,229 INFO L87 Difference]: Start difference. First operand 333 states and 335 transitions. Second operand 161 states. [2018-09-30 23:30:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:31,901 INFO L93 Difference]: Finished difference Result 349 states and 353 transitions. [2018-09-30 23:30:31,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-09-30 23:30:31,902 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 332 [2018-09-30 23:30:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:31,903 INFO L225 Difference]: With dead ends: 349 [2018-09-30 23:30:31,903 INFO L226 Difference]: Without dead ends: 335 [2018-09-30 23:30:31,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:30:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-09-30 23:30:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-09-30 23:30:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-09-30 23:30:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 337 transitions. [2018-09-30 23:30:31,918 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 337 transitions. Word has length 332 [2018-09-30 23:30:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:31,918 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 337 transitions. [2018-09-30 23:30:31,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-09-30 23:30:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 337 transitions. [2018-09-30 23:30:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-09-30 23:30:31,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:31,920 INFO L375 BasicCegarLoop]: trace histogram [160, 159, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:30:31,920 INFO L423 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:31,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:31,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1977259096, now seen corresponding path program 158 times [2018-09-30 23:30:31,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:31,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:31,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:31,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:31,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25458 backedges. 0 proven. 25440 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:41,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:41,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:41,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:30:41,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:30:41,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:41,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25458 backedges. 0 proven. 25440 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:41,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:41,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-09-30 23:30:41,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:30:41,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:30:41,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:30:41,769 INFO L87 Difference]: Start difference. First operand 335 states and 337 transitions. Second operand 162 states. [2018-09-30 23:30:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:42,923 INFO L93 Difference]: Finished difference Result 351 states and 355 transitions. [2018-09-30 23:30:42,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-09-30 23:30:42,923 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 334 [2018-09-30 23:30:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:42,923 INFO L225 Difference]: With dead ends: 351 [2018-09-30 23:30:42,924 INFO L226 Difference]: Without dead ends: 337 [2018-09-30 23:30:42,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:30:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-09-30 23:30:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2018-09-30 23:30:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2018-09-30 23:30:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 339 transitions. [2018-09-30 23:30:42,932 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 339 transitions. Word has length 334 [2018-09-30 23:30:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:42,933 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 339 transitions. [2018-09-30 23:30:42,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:30:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 339 transitions. [2018-09-30 23:30:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-09-30 23:30:42,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:42,934 INFO L375 BasicCegarLoop]: trace histogram [161, 160, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:30:42,934 INFO L423 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:42,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:42,934 INFO L82 PathProgramCache]: Analyzing trace with hash -917686700, now seen corresponding path program 159 times [2018-09-30 23:30:42,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:42,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:42,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:42,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:42,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25778 backedges. 0 proven. 25760 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:52,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:52,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:52,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:30:53,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 161 check-sat command(s) [2018-09-30 23:30:53,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:53,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 25778 backedges. 0 proven. 25760 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:30:53,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:53,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 162] total 162 [2018-09-30 23:30:53,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-09-30 23:30:53,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-09-30 23:30:53,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:30:53,876 INFO L87 Difference]: Start difference. First operand 337 states and 339 transitions. Second operand 163 states. [2018-09-30 23:30:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:55,279 INFO L93 Difference]: Finished difference Result 353 states and 357 transitions. [2018-09-30 23:30:55,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-09-30 23:30:55,280 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 336 [2018-09-30 23:30:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:55,280 INFO L225 Difference]: With dead ends: 353 [2018-09-30 23:30:55,280 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 23:30:55,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:30:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 23:30:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-09-30 23:30:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-30 23:30:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 341 transitions. [2018-09-30 23:30:55,290 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 341 transitions. Word has length 336 [2018-09-30 23:30:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:55,290 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 341 transitions. [2018-09-30 23:30:55,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-09-30 23:30:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 341 transitions. [2018-09-30 23:30:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-30 23:30:55,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:55,292 INFO L375 BasicCegarLoop]: trace histogram [162, 161, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:30:55,292 INFO L423 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:55,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:55,292 INFO L82 PathProgramCache]: Analyzing trace with hash 178211152, now seen corresponding path program 160 times [2018-09-30 23:30:55,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:55,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:55,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:55,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:55,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 26100 backedges. 0 proven. 26082 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:05,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:05,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:05,475 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:31:05,703 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:31:05,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:05,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 26100 backedges. 0 proven. 26082 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:05,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:05,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 163 [2018-09-30 23:31:05,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 23:31:05,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 23:31:05,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:31:05,830 INFO L87 Difference]: Start difference. First operand 339 states and 341 transitions. Second operand 164 states. [2018-09-30 23:31:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:07,396 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-09-30 23:31:07,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-09-30 23:31:07,397 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 338 [2018-09-30 23:31:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:07,397 INFO L225 Difference]: With dead ends: 355 [2018-09-30 23:31:07,397 INFO L226 Difference]: Without dead ends: 341 [2018-09-30 23:31:07,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:31:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-09-30 23:31:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2018-09-30 23:31:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-30 23:31:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 343 transitions. [2018-09-30 23:31:07,407 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 343 transitions. Word has length 338 [2018-09-30 23:31:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:07,407 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 343 transitions. [2018-09-30 23:31:07,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 23:31:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 343 transitions. [2018-09-30 23:31:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-30 23:31:07,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:07,409 INFO L375 BasicCegarLoop]: trace histogram [163, 162, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:31:07,409 INFO L423 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:07,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:07,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1069059404, now seen corresponding path program 161 times [2018-09-30 23:31:07,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:07,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:07,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:07,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:07,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 26424 backedges. 0 proven. 26406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:17,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:17,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:17,392 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:31:18,240 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 163 check-sat command(s) [2018-09-30 23:31:18,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:18,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 26424 backedges. 0 proven. 26406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:18,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:18,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 164] total 164 [2018-09-30 23:31:18,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-09-30 23:31:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-09-30 23:31:18,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:31:18,369 INFO L87 Difference]: Start difference. First operand 341 states and 343 transitions. Second operand 165 states. [2018-09-30 23:31:19,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:19,838 INFO L93 Difference]: Finished difference Result 357 states and 361 transitions. [2018-09-30 23:31:19,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-09-30 23:31:19,838 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 340 [2018-09-30 23:31:19,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:19,839 INFO L225 Difference]: With dead ends: 357 [2018-09-30 23:31:19,840 INFO L226 Difference]: Without dead ends: 343 [2018-09-30 23:31:19,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:31:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-30 23:31:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-09-30 23:31:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-09-30 23:31:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2018-09-30 23:31:19,849 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 340 [2018-09-30 23:31:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:19,850 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2018-09-30 23:31:19,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-09-30 23:31:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2018-09-30 23:31:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-30 23:31:19,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:19,851 INFO L375 BasicCegarLoop]: trace histogram [164, 163, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:31:19,851 INFO L423 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:19,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:19,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1819229624, now seen corresponding path program 162 times [2018-09-30 23:31:19,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:19,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:19,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:19,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:19,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 26750 backedges. 0 proven. 26732 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:30,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:30,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:30,233 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:31:31,025 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 164 check-sat command(s) [2018-09-30 23:31:31,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:31,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 26750 backedges. 0 proven. 26732 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:31,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:31,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165] total 165 [2018-09-30 23:31:31,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 23:31:31,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 23:31:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:31:31,152 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand 166 states. [2018-09-30 23:31:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:32,615 INFO L93 Difference]: Finished difference Result 359 states and 363 transitions. [2018-09-30 23:31:32,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-09-30 23:31:32,616 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 342 [2018-09-30 23:31:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:32,617 INFO L225 Difference]: With dead ends: 359 [2018-09-30 23:31:32,617 INFO L226 Difference]: Without dead ends: 345 [2018-09-30 23:31:32,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:31:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2018-09-30 23:31:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2018-09-30 23:31:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-09-30 23:31:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 347 transitions. [2018-09-30 23:31:32,628 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 347 transitions. Word has length 342 [2018-09-30 23:31:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:32,628 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 347 transitions. [2018-09-30 23:31:32,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 23:31:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 347 transitions. [2018-09-30 23:31:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-09-30 23:31:32,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:32,629 INFO L375 BasicCegarLoop]: trace histogram [165, 164, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:31:32,629 INFO L423 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:32,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:32,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1378854980, now seen corresponding path program 163 times [2018-09-30 23:31:32,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:32,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:32,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:32,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:32,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 27078 backedges. 0 proven. 27060 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:42,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:42,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:42,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:43,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27078 backedges. 0 proven. 27060 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:43,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:43,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166, 166] total 166 [2018-09-30 23:31:43,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-09-30 23:31:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-09-30 23:31:43,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:31:43,185 INFO L87 Difference]: Start difference. First operand 345 states and 347 transitions. Second operand 167 states. [2018-09-30 23:31:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:44,344 INFO L93 Difference]: Finished difference Result 361 states and 365 transitions. [2018-09-30 23:31:44,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-09-30 23:31:44,345 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 344 [2018-09-30 23:31:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:44,345 INFO L225 Difference]: With dead ends: 361 [2018-09-30 23:31:44,345 INFO L226 Difference]: Without dead ends: 347 [2018-09-30 23:31:44,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:31:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-09-30 23:31:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-09-30 23:31:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-09-30 23:31:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 349 transitions. [2018-09-30 23:31:44,354 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 349 transitions. Word has length 344 [2018-09-30 23:31:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:44,355 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 349 transitions. [2018-09-30 23:31:44,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-09-30 23:31:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 349 transitions. [2018-09-30 23:31:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-30 23:31:44,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:44,356 INFO L375 BasicCegarLoop]: trace histogram [166, 165, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:31:44,356 INFO L423 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:44,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash -458424512, now seen corresponding path program 164 times [2018-09-30 23:31:44,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:44,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:44,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:44,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:44,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 27408 backedges. 0 proven. 27390 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:55,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:55,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:55,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:31:55,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:31:55,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:55,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 27408 backedges. 0 proven. 27390 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:31:55,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:55,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167] total 167 [2018-09-30 23:31:55,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 23:31:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 23:31:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:31:55,532 INFO L87 Difference]: Start difference. First operand 347 states and 349 transitions. Second operand 168 states. [2018-09-30 23:31:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:56,237 INFO L93 Difference]: Finished difference Result 363 states and 367 transitions. [2018-09-30 23:31:56,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-09-30 23:31:56,238 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 346 [2018-09-30 23:31:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:56,238 INFO L225 Difference]: With dead ends: 363 [2018-09-30 23:31:56,238 INFO L226 Difference]: Without dead ends: 349 [2018-09-30 23:31:56,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:31:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-09-30 23:31:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2018-09-30 23:31:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-09-30 23:31:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 351 transitions. [2018-09-30 23:31:56,248 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 351 transitions. Word has length 346 [2018-09-30 23:31:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:56,249 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 351 transitions. [2018-09-30 23:31:56,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 23:31:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 351 transitions. [2018-09-30 23:31:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-09-30 23:31:56,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:56,250 INFO L375 BasicCegarLoop]: trace histogram [167, 166, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:31:56,250 INFO L423 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:56,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:56,250 INFO L82 PathProgramCache]: Analyzing trace with hash -852457668, now seen corresponding path program 165 times [2018-09-30 23:31:56,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:56,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:56,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:56,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:56,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 27740 backedges. 0 proven. 27722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:32:06,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:06,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:06,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:07,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 167 check-sat command(s) [2018-09-30 23:32:07,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:07,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 27740 backedges. 0 proven. 27722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:32:08,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:08,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168, 168] total 168 [2018-09-30 23:32:08,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-09-30 23:32:08,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-09-30 23:32:08,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-09-30 23:32:08,012 INFO L87 Difference]: Start difference. First operand 349 states and 351 transitions. Second operand 169 states. [2018-09-30 23:32:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:09,414 INFO L93 Difference]: Finished difference Result 365 states and 369 transitions. [2018-09-30 23:32:09,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-09-30 23:32:09,415 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 348 [2018-09-30 23:32:09,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:09,415 INFO L225 Difference]: With dead ends: 365 [2018-09-30 23:32:09,415 INFO L226 Difference]: Without dead ends: 351 [2018-09-30 23:32:09,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-09-30 23:32:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-30 23:32:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-09-30 23:32:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-30 23:32:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 353 transitions. [2018-09-30 23:32:09,425 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 353 transitions. Word has length 348 [2018-09-30 23:32:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:09,425 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 353 transitions. [2018-09-30 23:32:09,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-09-30 23:32:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 353 transitions. [2018-09-30 23:32:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-09-30 23:32:09,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:09,426 INFO L375 BasicCegarLoop]: trace histogram [168, 167, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:32:09,426 INFO L423 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:09,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:09,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1561198536, now seen corresponding path program 166 times [2018-09-30 23:32:09,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:09,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:09,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:09,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:09,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 28074 backedges. 0 proven. 28056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:32:20,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:20,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:20,122 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:20,360 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:20,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:20,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 28074 backedges. 0 proven. 28056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 23:32:20,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:20,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169, 169] total 169 [2018-09-30 23:32:20,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 23:32:20,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 23:32:20,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:32:20,491 INFO L87 Difference]: Start difference. First operand 351 states and 353 transitions. Second operand 170 states. Received shutdown request... [2018-09-30 23:32:22,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-09-30 23:32:22,056 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:32:22,062 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:32:22,063 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:32:22 BoogieIcfgContainer [2018-09-30 23:32:22,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:32:22,064 INFO L168 Benchmark]: Toolchain (without parser) took 764000.69 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 83.4 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 133.6 MB). Peak memory consumption was 894.9 MB. Max. memory is 7.1 GB. [2018-09-30 23:32:22,066 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:32:22,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.04 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:32:22,066 INFO L168 Benchmark]: Boogie Preprocessor took 20.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:32:22,066 INFO L168 Benchmark]: RCFGBuilder took 362.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:32:22,067 INFO L168 Benchmark]: TraceAbstraction took 763574.04 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 83.4 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 112.4 MB). Peak memory consumption was 873.7 MB. Max. memory is 7.1 GB. [2018-09-30 23:32:22,069 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 0.14 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 38.04 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 20.46 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 362.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 763574.04 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 83.4 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 112.4 MB). Peak memory consumption was 873.7 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 constructing difference of abstraction (351states) and FLOYD_HOARE automaton (currently 162 states, 170 states before enhancement), while ReachableStatesComputation was computing reachable states (320 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 763.5s OverallTime, 170 OverallIterations, 168 TraceHistogramMax, 76.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1523 SDtfs, 31 SDslu, 43372 SDs, 0 SdLazy, 26040 SolverSat, 375 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44925 GetRequests, 30723 SyntacticMatches, 0 SemanticMatches, 14202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 604.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=351occurred in iteration=169, 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: 1.1s AutomataMinimizationTime, 169 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 3.7s SsaConstructionTime, 49.6s SatisfiabilityAnalysisTime, 620.6s InterpolantComputationTime, 61467 NumberOfCodeBlocks, 61467 NumberOfCodeBlocksAsserted, 7336 NumberOfCheckSat, 61130 ConstructedInterpolants, 0 QuantifiedInterpolants, 41281244 SizeOfPredicates, 167 NumberOfNonLiveVariables, 151096 ConjunctsInSsa, 14362 ConjunctsInUnsatCore, 337 InterpolantComputations, 3 PerfectInterpolantSequences, 5988/3166964 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-0-2018-09-30_23-32-22-079.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-0-2018-09-30_23-32-22-079.csv Completed graceful shutdown