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-d19836b [2018-09-26 21:16:22,821 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:16:22,823 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:16:22,840 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:16:22,840 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:16:22,841 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:16:22,843 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:16:22,844 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:16:22,846 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:16:22,847 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:16:22,848 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:16:22,872 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 [2018-09-26 21:16:22,892 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:16:22,892 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:16:22,893 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:16:22,893 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:16:22,895 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:16:22,895 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:16:22,895 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:16:22,896 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:16:22,896 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:16:22,897 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:16:22,897 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:16:22,897 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:16:22,897 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:16:22,897 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:16:22,898 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:16:22,898 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:16:22,898 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:16:22,898 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:16:22,899 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:16:22,900 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:16:22,900 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:16:22,900 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:16:22,900 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:16:22,900 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:16:22,901 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:16:22,901 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:16:22,901 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:16:22,901 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:16:22,901 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:16:22,902 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:16:22,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:16:22,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:16:22,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:16:22,982 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:16:22,983 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:16:22,984 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-26 21:16:22,984 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-26 21:16:23,053 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:16:23,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:16:23,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:16:23,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:16:23,057 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:16:23,078 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 26.09 09:16:23" (1/1) ... [2018-09-26 21:16:23,090 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 26.09 09:16:23" (1/1) ... [2018-09-26 21:16:23,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:16:23,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:16:23,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:16:23,097 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:16:23,108 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 26.09 09:16:23" (1/1) ... [2018-09-26 21:16:23,109 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 26.09 09:16:23" (1/1) ... [2018-09-26 21:16:23,109 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 26.09 09:16:23" (1/1) ... [2018-09-26 21:16:23,110 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 26.09 09:16:23" (1/1) ... [2018-09-26 21:16:23,113 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 26.09 09:16:23" (1/1) ... [2018-09-26 21:16:23,116 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 26.09 09:16:23" (1/1) ... [2018-09-26 21:16:23,117 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 26.09 09:16:23" (1/1) ... [2018-09-26 21:16:23,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:16:23,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:16:23,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:16:23,121 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:16:23,122 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 26.09 09:16:23" (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 [2018-09-26 21:16:23,203 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-26 21:16:23,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:16:23,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:16:23,547 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:16:23,548 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:16:23 BoogieIcfgContainer [2018-09-26 21:16:23,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:16:23,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:16:23,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:16:23,555 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:16:23,555 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 26.09 09:16:23" (1/2) ... [2018-09-26 21:16:23,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652510a4 and model type fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:16:23, skipping insertion in model container [2018-09-26 21:16:23,556 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 26.09 09:16:23" (2/2) ... [2018-09-26 21:16:23,559 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-26 21:16:23,569 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:16:23,580 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:16:23,636 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:16:23,637 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:16:23,637 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:16:23,638 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:16:23,638 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:16:23,638 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:16:23,638 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:16:23,638 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:16:23,639 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:16:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-26 21:16:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:16:23,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:23,669 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:23,670 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:23,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:23,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1807861163, now seen corresponding path program 1 times [2018-09-26 21:16:23,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:23,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:23,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:23,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:23,832 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:16:23,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:16:23,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:16:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:16:23,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:16:23,856 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-26 21:16:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:23,899 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-26 21:16:23,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:16:23,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-26 21:16:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:23,912 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:16:23,913 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:16:23,917 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 [2018-09-26 21:16:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:16:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:16:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:16:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-26 21:16:23,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-26 21:16:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:23,954 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-26 21:16:23,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:16:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-26 21:16:23,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:16:23,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:23,955 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:23,956 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:23,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash 89245487, now seen corresponding path program 1 times [2018-09-26 21:16:23,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:23,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:23,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:23,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:24,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:24,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:24,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:24,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:24,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:24,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:16:24,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:16:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:16:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:16:24,189 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-26 21:16:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:24,243 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-26 21:16:24,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:16:24,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-26 21:16:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:24,245 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:16:24,245 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:16:24,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:16:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:16:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:16:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:16:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-26 21:16:24,252 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-26 21:16:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:24,252 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-26 21:16:24,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:16:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-26 21:16:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:16:24,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:24,254 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:24,255 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:24,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:24,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2061989811, now seen corresponding path program 2 times [2018-09-26 21:16:24,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:24,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:24,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:24,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:24,365 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:16:24,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:16:24,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:16:24,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:16:24,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:16:24,366 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-09-26 21:16:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:24,473 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-09-26 21:16:24,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:16:24,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-26 21:16:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:24,474 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:16:24,475 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:16:24,475 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 [2018-09-26 21:16:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:16:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2018-09-26 21:16:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:16:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-09-26 21:16:24,482 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2018-09-26 21:16:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:24,483 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-09-26 21:16:24,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:16:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-09-26 21:16:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:16:24,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:24,484 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:24,484 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:24,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2062049393, now seen corresponding path program 1 times [2018-09-26 21:16:24,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:24,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:24,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:24,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-26 21:16:24,536 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:16:24,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:16:24,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:16:24,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:16:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:16:24,538 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2018-09-26 21:16:24,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:24,655 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2018-09-26 21:16:24,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:16:24,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-09-26 21:16:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:24,659 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:16:24,659 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:16:24,660 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 [2018-09-26 21:16:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:16:24,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-09-26 21:16:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:16:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-26 21:16:24,674 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2018-09-26 21:16:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:24,676 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-26 21:16:24,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:16:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-26 21:16:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:16:24,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:24,678 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2018-09-26 21:16:24,678 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:24,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1980186676, now seen corresponding path program 1 times [2018-09-26 21:16:24,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:24,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:24,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:24,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:24,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:24,866 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 [2018-09-26 21:16:24,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:24,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:24,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:24,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:16:24,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:16:24,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:16:24,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:16:24,950 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2018-09-26 21:16:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:25,041 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-09-26 21:16:25,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:16:25,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-09-26 21:16:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:25,043 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:16:25,043 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:16:25,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:16:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:16:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:16:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:16:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-26 21:16:25,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-26 21:16:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:25,056 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-26 21:16:25,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:16:25,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-26 21:16:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:16:25,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:25,059 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:25,059 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:25,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:25,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1317950664, now seen corresponding path program 2 times [2018-09-26 21:16:25,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:25,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:25,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:25,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:25,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:25,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:25,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:25,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:25,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:25,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:25,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:25,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:16:25,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:16:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:16:25,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:16:25,277 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-09-26 21:16:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:25,379 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-09-26 21:16:25,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:16:25,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-09-26 21:16:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:25,382 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:16:25,383 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:16:25,384 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 [2018-09-26 21:16:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:16:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:16:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:16:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-26 21:16:25,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2018-09-26 21:16:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:25,392 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-26 21:16:25,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:16:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-26 21:16:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:16:25,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:25,394 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:25,394 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:25,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1142069956, now seen corresponding path program 3 times [2018-09-26 21:16:25,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:25,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:25,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:25,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:25,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:25,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:25,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:25,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:16:25,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:25,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:25,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:25,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:16:25,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:16:25,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:16:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:16:25,596 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-09-26 21:16:25,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:25,640 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-09-26 21:16:25,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:16:25,640 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-09-26 21:16:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:25,641 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:16:25,641 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:16:25,642 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 [2018-09-26 21:16:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:16:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:16:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:16:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-09-26 21:16:25,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-09-26 21:16:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:25,648 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-09-26 21:16:25,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:16:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-09-26 21:16:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:16:25,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:25,650 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:25,650 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:25,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:25,650 INFO L82 PathProgramCache]: Analyzing trace with hash -375565888, now seen corresponding path program 4 times [2018-09-26 21:16:25,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:25,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:25,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:25,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:25,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:25,783 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 [2018-09-26 21:16:25,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:25,849 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:25,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:25,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:25,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:25,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:16:25,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:16:25,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:16:25,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:16:25,884 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2018-09-26 21:16:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:25,975 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-26 21:16:25,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:16:25,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-26 21:16:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:25,979 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:16:25,979 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:16:25,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:16:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:16:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:16:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:16:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-26 21:16:25,994 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-26 21:16:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:25,994 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-26 21:16:25,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:16:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-26 21:16:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:16:26,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:26,000 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:26,000 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:26,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:26,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1465268668, now seen corresponding path program 5 times [2018-09-26 21:16:26,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:26,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:26,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:26,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:26,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:26,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:26,389 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 [2018-09-26 21:16:26,398 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:26,483 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:16:26,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:26,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:26,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:26,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:16:26,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:16:26,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:16:26,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:16:26,518 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-09-26 21:16:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:26,564 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-09-26 21:16:26,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:16:26,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-09-26 21:16:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:26,566 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:16:26,567 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:16:26,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:16:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:16:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:16:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:16:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-26 21:16:26,575 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2018-09-26 21:16:26,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:26,575 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-26 21:16:26,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:16:26,575 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-26 21:16:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:16:26,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:26,576 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:26,576 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:26,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash 980751032, now seen corresponding path program 6 times [2018-09-26 21:16:26,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:26,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:26,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:26,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:26,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:26,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:26,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:26,876 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:26,919 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:16:26,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:26,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:26,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:26,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:16:26,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:16:26,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:16:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:16:26,960 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-09-26 21:16:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:27,061 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-09-26 21:16:27,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:16:27,064 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-09-26 21:16:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:27,065 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:16:27,065 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:16:27,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:16:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:16:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:16:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:16:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-09-26 21:16:27,071 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2018-09-26 21:16:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:27,072 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-09-26 21:16:27,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:16:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-09-26 21:16:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:16:27,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:27,073 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:27,074 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:27,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:27,074 INFO L82 PathProgramCache]: Analyzing trace with hash -784229196, now seen corresponding path program 7 times [2018-09-26 21:16:27,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:27,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:27,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:27,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:27,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:27,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:27,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:27,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:27,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:27,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:16:27,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:16:27,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:16:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:16:27,329 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2018-09-26 21:16:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:27,405 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-26 21:16:27,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:16:27,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-09-26 21:16:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:27,412 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:16:27,412 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:16:27,413 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 [2018-09-26 21:16:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:16:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:16:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:16:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-26 21:16:27,419 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2018-09-26 21:16:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:27,419 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-26 21:16:27,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:16:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-26 21:16:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:16:27,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:27,421 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:27,421 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:27,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash -418146384, now seen corresponding path program 8 times [2018-09-26 21:16:27,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:27,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:27,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:27,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:27,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:27,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:27,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:27,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:27,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:27,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:27,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:27,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:16:27,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:16:27,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:16:27,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:16:27,746 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2018-09-26 21:16:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:27,954 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-09-26 21:16:27,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:16:27,954 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-09-26 21:16:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:27,955 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:16:27,955 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:16:27,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:16:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:16:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:16:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:16:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-26 21:16:27,962 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2018-09-26 21:16:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:27,962 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-26 21:16:27,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:16:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-26 21:16:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:16:27,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:27,963 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:27,964 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:27,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:27,964 INFO L82 PathProgramCache]: Analyzing trace with hash -799882324, now seen corresponding path program 9 times [2018-09-26 21:16:27,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:27,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:27,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:27,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:28,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:28,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:28,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:28,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-26 21:16:28,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:28,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:28,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:28,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:16:28,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:16:28,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:16:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:16:28,304 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2018-09-26 21:16:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:28,664 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2018-09-26 21:16:28,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:16:28,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-09-26 21:16:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:28,667 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:16:28,667 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:16:28,668 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 [2018-09-26 21:16:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:16:28,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:16:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:16:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-09-26 21:16:28,674 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2018-09-26 21:16:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:28,674 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-09-26 21:16:28,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:16:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-09-26 21:16:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:16:28,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:28,675 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:28,675 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:28,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1719066792, now seen corresponding path program 10 times [2018-09-26 21:16:28,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:28,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:28,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:28,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:28,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:28,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:28,905 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 [2018-09-26 21:16:28,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:28,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:28,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:28,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:29,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:29,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:16:29,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:16:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:16:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:16:29,006 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2018-09-26 21:16:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:29,088 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-09-26 21:16:29,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:16:29,088 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-26 21:16:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:29,089 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:16:29,089 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:16:29,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:16:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:16:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:16:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:16:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-26 21:16:29,096 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-26 21:16:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:29,097 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-26 21:16:29,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:16:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-26 21:16:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:16:29,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:29,098 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:29,098 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:29,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash 67612324, now seen corresponding path program 11 times [2018-09-26 21:16:29,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:29,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:29,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:29,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:29,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:29,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:29,278 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 [2018-09-26 21:16:29,289 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:29,322 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:16:29,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:29,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:29,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:29,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:16:29,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:16:29,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:16:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:16:29,370 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-26 21:16:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:29,694 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-09-26 21:16:29,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:16:29,695 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-26 21:16:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:29,695 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:16:29,695 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:16:29,696 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 [2018-09-26 21:16:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:16:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:16:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:16:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-26 21:16:29,702 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2018-09-26 21:16:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:29,702 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-26 21:16:29,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:16:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-26 21:16:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:16:29,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:29,703 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:29,704 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:29,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:29,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2137199200, now seen corresponding path program 12 times [2018-09-26 21:16:29,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:29,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:29,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:29,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:29,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:29,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:29,948 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 [2018-09-26 21:16:29,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:30,096 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-26 21:16:30,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:30,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:30,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:30,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:16:30,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:16:30,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:16:30,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:16:30,144 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2018-09-26 21:16:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:30,249 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-09-26 21:16:30,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:16:30,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-09-26 21:16:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:30,250 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:16:30,250 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:16:30,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:16:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:16:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:16:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:16:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-26 21:16:30,256 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2018-09-26 21:16:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:30,257 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-26 21:16:30,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:16:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-26 21:16:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:16:30,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:30,258 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:30,258 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:30,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:30,259 INFO L82 PathProgramCache]: Analyzing trace with hash 752770460, now seen corresponding path program 13 times [2018-09-26 21:16:30,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:30,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:30,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:30,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:30,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:30,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:30,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:30,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:30,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:30,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:30,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:16:30,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:16:30,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:16:30,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:16:30,631 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2018-09-26 21:16:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:30,749 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2018-09-26 21:16:30,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:16:30,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-26 21:16:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:30,750 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:16:30,751 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:16:30,751 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 [2018-09-26 21:16:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:16:30,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:16:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:16:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-26 21:16:30,758 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-26 21:16:30,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:30,758 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-26 21:16:30,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:16:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-26 21:16:30,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:16:30,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:30,760 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:30,760 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:30,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash -830226792, now seen corresponding path program 14 times [2018-09-26 21:16:30,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:30,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:30,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:30,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:30,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:31,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:31,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:31,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:31,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:31,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:31,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:31,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:31,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:16:31,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:16:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:16:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:16:31,399 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2018-09-26 21:16:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:31,689 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-09-26 21:16:31,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:16:31,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-09-26 21:16:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:31,690 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:16:31,691 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:16:31,693 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 [2018-09-26 21:16:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:16:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:16:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:16:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-26 21:16:31,699 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2018-09-26 21:16:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:31,705 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-26 21:16:31,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:16:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-26 21:16:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:16:31,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:31,706 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:31,706 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:31,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1672163180, now seen corresponding path program 15 times [2018-09-26 21:16:31,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:31,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:31,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:31,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:31,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:31,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:31,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:31,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:32,050 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-26 21:16:32,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:32,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:32,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:32,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:16:32,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:16:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:16:32,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:16:32,096 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2018-09-26 21:16:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:32,201 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-09-26 21:16:32,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:16:32,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-09-26 21:16:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:32,201 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:16:32,202 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:16:32,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:16:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:16:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:16:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:16:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-26 21:16:32,208 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2018-09-26 21:16:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:32,208 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-26 21:16:32,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:16:32,209 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-26 21:16:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:16:32,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:32,210 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:32,210 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:32,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash 975786896, now seen corresponding path program 16 times [2018-09-26 21:16:32,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:32,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:32,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:32,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:32,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:32,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:32,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:32,548 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:32,583 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:32,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:32,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:32,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:32,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:16:32,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:16:32,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:16:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:16:32,622 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2018-09-26 21:16:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:32,689 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-26 21:16:32,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:16:32,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2018-09-26 21:16:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:32,691 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:16:32,691 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:16:32,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:16:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:16:32,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:16:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:16:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-09-26 21:16:32,701 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2018-09-26 21:16:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:32,702 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-09-26 21:16:32,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:16:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-09-26 21:16:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:16:32,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:32,703 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:32,703 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:32,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:32,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1259796596, now seen corresponding path program 17 times [2018-09-26 21:16:32,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:32,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:32,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:32,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:32,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:33,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:33,032 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 [2018-09-26 21:16:33,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:33,079 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:16:33,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:33,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:33,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:33,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:16:33,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:16:33,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:16:33,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:16:33,127 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2018-09-26 21:16:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:33,333 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-09-26 21:16:33,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:16:33,333 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-09-26 21:16:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:33,334 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:16:33,334 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:16:33,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:16:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:16:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:16:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:16:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-26 21:16:33,341 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2018-09-26 21:16:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:33,342 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-26 21:16:33,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:16:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-26 21:16:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:16:33,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:33,343 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:33,343 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:33,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:33,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2123082888, now seen corresponding path program 18 times [2018-09-26 21:16:33,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:33,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:33,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:33,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:33,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:34,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:34,204 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 [2018-09-26 21:16:34,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:34,261 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-26 21:16:34,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:34,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:34,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:34,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:16:34,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:16:34,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:16:34,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:16:34,327 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-26 21:16:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:34,431 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2018-09-26 21:16:34,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:16:34,433 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2018-09-26 21:16:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:34,434 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:16:34,434 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:16:34,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:16:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:16:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:16:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:16:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-09-26 21:16:34,446 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2018-09-26 21:16:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:34,446 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-09-26 21:16:34,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:16:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-09-26 21:16:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:16:34,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:34,447 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:34,451 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:34,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1780023940, now seen corresponding path program 19 times [2018-09-26 21:16:34,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:34,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:34,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:34,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:34,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:35,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:35,049 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 [2018-09-26 21:16:35,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:35,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:35,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:35,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:16:35,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:16:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:16:35,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:16:35,139 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2018-09-26 21:16:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:35,228 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2018-09-26 21:16:35,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:16:35,229 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2018-09-26 21:16:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:35,229 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:16:35,230 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:16:35,230 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 [2018-09-26 21:16:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:16:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:16:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:16:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-26 21:16:35,235 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-26 21:16:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:35,235 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-26 21:16:35,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:16:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-26 21:16:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:16:35,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:35,236 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:35,236 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:35,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1482110592, now seen corresponding path program 20 times [2018-09-26 21:16:35,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:35,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:35,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:35,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:35,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:35,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:35,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:35,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:35,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:35,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:35,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:35,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:35,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:16:35,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:16:35,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:16:35,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:16:35,856 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2018-09-26 21:16:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:35,938 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-26 21:16:35,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:16:35,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2018-09-26 21:16:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:35,939 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:16:35,940 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:16:35,940 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 [2018-09-26 21:16:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:16:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:16:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:16:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-26 21:16:35,946 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2018-09-26 21:16:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:35,946 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-26 21:16:35,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:16:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-26 21:16:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:16:35,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:35,947 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:35,947 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:35,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1067269764, now seen corresponding path program 21 times [2018-09-26 21:16:35,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:35,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:35,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:35,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:35,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:36,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:36,597 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 [2018-09-26 21:16:36,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:36,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-26 21:16:36,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:36,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:36,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:36,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:16:36,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:16:36,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:16:36,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:16:36,713 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2018-09-26 21:16:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:36,939 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2018-09-26 21:16:36,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:16:36,941 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2018-09-26 21:16:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:36,941 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:16:36,942 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:16:36,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:16:36,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:16:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:16:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:16:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-26 21:16:36,947 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2018-09-26 21:16:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:36,947 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-26 21:16:36,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:16:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-26 21:16:36,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:16:36,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:36,948 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:36,948 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:36,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:36,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192584, now seen corresponding path program 22 times [2018-09-26 21:16:36,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:36,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:36,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:36,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:36,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:37,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:37,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:37,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:37,460 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:37,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:37,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:37,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:37,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:16:37,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:16:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:16:37,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:16:37,500 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2018-09-26 21:16:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:37,576 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-09-26 21:16:37,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:16:37,577 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-26 21:16:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:37,577 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:16:37,577 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:16:37,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:16:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:16:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:16:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:16:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-26 21:16:37,582 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-26 21:16:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:37,583 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-26 21:16:37,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:16:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-26 21:16:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:16:37,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:37,583 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:37,584 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:37,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:37,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1296319604, now seen corresponding path program 23 times [2018-09-26 21:16:37,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:37,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:37,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:37,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:37,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:38,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:38,346 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 [2018-09-26 21:16:38,354 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:38,416 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:16:38,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:38,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:38,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:38,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:16:38,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:16:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:16:38,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:16:38,463 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2018-09-26 21:16:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:38,775 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-09-26 21:16:38,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:16:38,775 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2018-09-26 21:16:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:38,776 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:16:38,776 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:16:38,776 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 [2018-09-26 21:16:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:16:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:16:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:16:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-26 21:16:38,780 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2018-09-26 21:16:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:38,781 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-26 21:16:38,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:16:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-26 21:16:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:16:38,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:38,781 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:38,782 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:38,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1829457776, now seen corresponding path program 24 times [2018-09-26 21:16:38,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:38,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:38,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:38,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:38,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:39,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:39,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:39,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:39,554 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-26 21:16:39,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:39,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:39,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:39,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:16:39,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:16:39,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:16:39,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:16:39,589 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2018-09-26 21:16:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:39,690 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2018-09-26 21:16:39,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:16:39,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2018-09-26 21:16:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:39,691 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:16:39,691 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:16:39,692 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 [2018-09-26 21:16:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:16:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:16:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:16:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-09-26 21:16:39,696 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2018-09-26 21:16:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:39,697 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-09-26 21:16:39,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:16:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-09-26 21:16:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:16:39,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:39,698 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:39,698 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:39,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:39,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1220834452, now seen corresponding path program 25 times [2018-09-26 21:16:39,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:39,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:39,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:39,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:39,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:40,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:40,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:40,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:40,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:40,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:40,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:16:40,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:16:40,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:16:40,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:16:40,591 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2018-09-26 21:16:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:40,749 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-26 21:16:40,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:16:40,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2018-09-26 21:16:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:40,754 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:16:40,754 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:16:40,754 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 [2018-09-26 21:16:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:16:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:16:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:16:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-26 21:16:40,760 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2018-09-26 21:16:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:40,760 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-26 21:16:40,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:16:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-26 21:16:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:16:40,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:40,761 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:40,762 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:40,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash 910997608, now seen corresponding path program 26 times [2018-09-26 21:16:40,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:40,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:40,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:40,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:40,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:42,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:42,186 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 [2018-09-26 21:16:42,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:42,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:42,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:42,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:42,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:42,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:16:42,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:16:42,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:16:42,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:16:42,302 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2018-09-26 21:16:42,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:42,366 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2018-09-26 21:16:42,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:16:42,367 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2018-09-26 21:16:42,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:42,368 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:16:42,368 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:16:42,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:16:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:16:42,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:16:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:16:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-26 21:16:42,373 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2018-09-26 21:16:42,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:42,373 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-26 21:16:42,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:16:42,373 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-26 21:16:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:16:42,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:42,374 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:42,374 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:42,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:42,375 INFO L82 PathProgramCache]: Analyzing trace with hash 902207076, now seen corresponding path program 27 times [2018-09-26 21:16:42,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:42,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:42,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:42,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:42,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:43,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:43,611 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 [2018-09-26 21:16:43,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:43,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-26 21:16:43,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:43,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:43,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:43,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:16:43,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:16:43,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:16:43,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:16:43,718 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2018-09-26 21:16:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:43,792 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-09-26 21:16:43,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:16:43,793 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-09-26 21:16:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:43,794 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:16:43,794 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:16:43,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:16:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:16:43,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:16:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:16:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-26 21:16:43,800 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2018-09-26 21:16:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:43,801 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-26 21:16:43,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:16:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-26 21:16:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:16:43,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:43,801 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:43,802 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:43,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:43,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1044440416, now seen corresponding path program 28 times [2018-09-26 21:16:43,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:43,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:43,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:43,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:43,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:44,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:44,278 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 [2018-09-26 21:16:44,292 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:44,339 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:44,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:44,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:44,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:44,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:16:44,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:16:44,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:16:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:16:44,384 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2018-09-26 21:16:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:44,507 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2018-09-26 21:16:44,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:16:44,508 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2018-09-26 21:16:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:44,509 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:16:44,509 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:16:44,510 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 [2018-09-26 21:16:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:16:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:16:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:16:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-26 21:16:44,515 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-26 21:16:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:44,516 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-26 21:16:44,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:16:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-26 21:16:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:16:44,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:44,516 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:44,518 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:44,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash 291726684, now seen corresponding path program 29 times [2018-09-26 21:16:44,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:44,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:44,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:44,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:44,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:45,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:45,146 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 [2018-09-26 21:16:45,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:45,224 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:16:45,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:45,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:45,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:45,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:16:45,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:16:45,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:16:45,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:16:45,266 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2018-09-26 21:16:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:45,360 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2018-09-26 21:16:45,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:16:45,360 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2018-09-26 21:16:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:45,361 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:16:45,361 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:16:45,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:16:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:16:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:16:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:16:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-26 21:16:45,366 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2018-09-26 21:16:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:45,366 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-26 21:16:45,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:16:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-26 21:16:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:16:45,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:45,366 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:45,367 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:45,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1511664040, now seen corresponding path program 30 times [2018-09-26 21:16:45,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:45,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:45,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:45,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:45,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:45,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:45,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:46,006 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:46,086 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-26 21:16:46,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:46,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:46,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:46,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:16:46,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:16:46,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:16:46,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:16:46,130 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2018-09-26 21:16:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:46,224 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2018-09-26 21:16:46,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:16:46,225 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-09-26 21:16:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:46,226 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:16:46,226 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:16:46,226 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 [2018-09-26 21:16:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:16:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:16:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:16:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-26 21:16:46,231 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2018-09-26 21:16:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:46,231 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-26 21:16:46,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:16:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-26 21:16:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:16:46,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:46,232 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:46,232 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:46,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:46,232 INFO L82 PathProgramCache]: Analyzing trace with hash 596637780, now seen corresponding path program 31 times [2018-09-26 21:16:46,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:46,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:46,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:46,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:46,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:47,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:47,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:47,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:47,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:47,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:47,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:16:47,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:16:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:16:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:16:47,322 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2018-09-26 21:16:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:47,432 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2018-09-26 21:16:47,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:16:47,433 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2018-09-26 21:16:47,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:47,434 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:16:47,434 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:16:47,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:16:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:16:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:16:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:16:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-26 21:16:47,439 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-26 21:16:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:47,439 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-26 21:16:47,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:16:47,439 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-26 21:16:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:16:47,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:47,440 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:47,440 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:47,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash -549876912, now seen corresponding path program 32 times [2018-09-26 21:16:47,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:47,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:47,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:47,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:47,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:48,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:48,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:48,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:48,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:48,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:48,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:48,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:48,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:16:48,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:16:48,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:16:48,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:16:48,099 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2018-09-26 21:16:48,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:48,287 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2018-09-26 21:16:48,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:16:48,288 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2018-09-26 21:16:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:48,289 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:16:48,289 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:16:48,290 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 [2018-09-26 21:16:48,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:16:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:16:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:16:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-26 21:16:48,294 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2018-09-26 21:16:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:48,294 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-26 21:16:48,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:16:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-26 21:16:48,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:16:48,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:48,295 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:48,295 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:48,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:48,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1456099148, now seen corresponding path program 33 times [2018-09-26 21:16:48,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:48,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:48,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:48,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:48,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:49,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:49,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:49,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:49,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-26 21:16:49,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:49,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:49,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:49,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:16:49,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:16:49,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:16:49,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:16:49,145 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2018-09-26 21:16:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:49,255 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-09-26 21:16:49,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:16:49,256 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2018-09-26 21:16:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:49,257 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:16:49,257 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:16:49,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:16:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:16:49,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:16:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:16:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-26 21:16:49,263 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2018-09-26 21:16:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:49,263 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-26 21:16:49,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:16:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-26 21:16:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:16:49,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:49,264 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:49,264 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:49,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:49,264 INFO L82 PathProgramCache]: Analyzing trace with hash 758776904, now seen corresponding path program 34 times [2018-09-26 21:16:49,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:49,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:49,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:49,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:49,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:50,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:50,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:50,020 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:50,078 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:50,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:50,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:50,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:50,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:16:50,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:16:50,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:16:50,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:16:50,129 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2018-09-26 21:16:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:50,260 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-26 21:16:50,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:16:50,260 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2018-09-26 21:16:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:50,261 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:16:50,261 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:16:50,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:16:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:16:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:16:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:16:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2018-09-26 21:16:50,268 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2018-09-26 21:16:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:50,268 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2018-09-26 21:16:50,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:16:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2018-09-26 21:16:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:16:50,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:50,269 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:50,269 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:50,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:50,269 INFO L82 PathProgramCache]: Analyzing trace with hash 646998596, now seen corresponding path program 35 times [2018-09-26 21:16:50,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:50,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:50,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:50,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:50,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:51,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:51,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:51,061 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:16:51,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:16:51,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:51,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:51,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:51,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:16:51,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:16:51,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:16:51,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:16:51,213 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2018-09-26 21:16:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:51,825 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2018-09-26 21:16:51,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:16:51,826 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2018-09-26 21:16:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:51,827 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:16:51,827 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:16:51,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:16:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:16:51,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:16:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:16:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-26 21:16:51,838 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2018-09-26 21:16:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:51,839 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-26 21:16:51,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:16:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-26 21:16:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:16:51,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:51,841 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:51,841 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:51,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:51,842 INFO L82 PathProgramCache]: Analyzing trace with hash 602227008, now seen corresponding path program 36 times [2018-09-26 21:16:51,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:51,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:51,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:51,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:51,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:52,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:52,641 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 [2018-09-26 21:16:52,649 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:16:52,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-26 21:16:52,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:52,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:52,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:52,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:16:52,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:16:52,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:16:52,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:16:52,788 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states. [2018-09-26 21:16:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:52,855 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-09-26 21:16:52,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:16:52,856 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2018-09-26 21:16:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:52,857 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:16:52,857 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:16:52,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:16:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:16:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:16:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:16:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2018-09-26 21:16:52,863 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2018-09-26 21:16:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:52,863 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2018-09-26 21:16:52,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:16:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2018-09-26 21:16:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:16:52,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:52,864 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:52,864 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:52,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash 526403900, now seen corresponding path program 37 times [2018-09-26 21:16:52,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:52,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:52,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:52,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:52,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:53,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:53,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:53,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:53,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:53,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:53,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:16:53,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:16:53,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:16:53,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:16:53,799 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2018-09-26 21:16:53,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:53,861 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-09-26 21:16:53,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:16:53,861 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2018-09-26 21:16:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:53,862 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:16:53,862 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:16:53,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:16:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:16:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:16:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:16:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-26 21:16:53,869 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-26 21:16:53,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:53,869 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-26 21:16:53,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:16:53,869 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-26 21:16:53,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:16:53,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:53,870 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:53,870 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:53,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:53,871 INFO L82 PathProgramCache]: Analyzing trace with hash 674841144, now seen corresponding path program 38 times [2018-09-26 21:16:53,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:53,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:53,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:53,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:53,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:54,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:54,717 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 [2018-09-26 21:16:54,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:54,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:54,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:54,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:54,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:54,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:16:54,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:16:54,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:16:54,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:16:54,844 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 42 states. [2018-09-26 21:16:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:54,948 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2018-09-26 21:16:54,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:16:54,949 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2018-09-26 21:16:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:54,950 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:16:54,950 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:16:54,951 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 [2018-09-26 21:16:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:16:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:16:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:16:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-26 21:16:54,956 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2018-09-26 21:16:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:54,956 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-26 21:16:54,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:16:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-26 21:16:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:16:54,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:54,957 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:54,958 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:54,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1589111860, now seen corresponding path program 39 times [2018-09-26 21:16:54,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:54,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:54,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:54,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:54,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:56,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:56,076 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 [2018-09-26 21:16:56,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:16:56,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-26 21:16:56,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:56,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:56,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:56,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:16:56,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:16:56,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:16:56,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:16:56,275 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2018-09-26 21:16:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:56,413 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2018-09-26 21:16:56,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:16:56,414 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2018-09-26 21:16:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:56,415 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:16:56,415 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:16:56,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:16:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:16:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:16:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:16:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2018-09-26 21:16:56,421 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2018-09-26 21:16:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:56,421 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2018-09-26 21:16:56,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:16:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2018-09-26 21:16:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:16:56,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:56,422 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:56,422 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:56,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:56,422 INFO L82 PathProgramCache]: Analyzing trace with hash -265025744, now seen corresponding path program 40 times [2018-09-26 21:16:56,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:56,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:56,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:56,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:56,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:57,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:57,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:57,920 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:57,985 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:57,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:57,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:16:58,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:58,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:16:58,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:16:58,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:16:58,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:16:58,042 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2018-09-26 21:16:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:59,196 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2018-09-26 21:16:59,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:16:59,197 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2018-09-26 21:16:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:59,197 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:16:59,197 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:16:59,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:16:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:16:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:16:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:16:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-26 21:16:59,202 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-26 21:16:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:59,202 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-26 21:16:59,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:16:59,203 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-26 21:16:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:16:59,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:59,203 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:16:59,204 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:59,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:59,204 INFO L82 PathProgramCache]: Analyzing trace with hash 320164652, now seen corresponding path program 41 times [2018-09-26 21:16:59,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:59,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:59,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:59,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:59,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:01,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:01,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:01,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:01,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-26 21:17:01,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:01,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:01,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:01,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:17:01,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:17:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:17:01,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:17:01,452 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 45 states. [2018-09-26 21:17:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:01,544 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2018-09-26 21:17:01,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:17:01,545 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2018-09-26 21:17:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:01,546 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:17:01,546 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:17:01,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:17:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:17:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:17:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:17:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-26 21:17:01,553 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2018-09-26 21:17:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:01,554 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-26 21:17:01,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:17:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-26 21:17:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:17:01,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:01,555 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:01,555 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:01,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:01,555 INFO L82 PathProgramCache]: Analyzing trace with hash 47419432, now seen corresponding path program 42 times [2018-09-26 21:17:01,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:01,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:01,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:01,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:01,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:02,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:02,773 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 [2018-09-26 21:17:02,782 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:02,883 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-26 21:17:02,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:02,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:02,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:02,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:17:02,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:17:02,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:17:02,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:17:02,936 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2018-09-26 21:17:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:03,051 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2018-09-26 21:17:03,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:17:03,051 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2018-09-26 21:17:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:03,052 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:17:03,052 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:17:03,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:17:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:17:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:17:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:17:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-26 21:17:03,058 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2018-09-26 21:17:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:03,059 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-26 21:17:03,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:17:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-26 21:17:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:17:03,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:03,060 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:03,060 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:03,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash -67731932, now seen corresponding path program 43 times [2018-09-26 21:17:03,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:03,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:03,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:03,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:03,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:05,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:05,451 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 [2018-09-26 21:17:05,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:05,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:05,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:05,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:17:05,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:17:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:17:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:17:05,581 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-26 21:17:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:05,719 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-26 21:17:05,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:17:05,720 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-26 21:17:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:05,721 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:17:05,721 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:17:05,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:17:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:17:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:17:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:17:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2018-09-26 21:17:05,727 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2018-09-26 21:17:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:05,728 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2018-09-26 21:17:05,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:17:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2018-09-26 21:17:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:17:05,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:05,729 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:05,729 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:05,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 940956960, now seen corresponding path program 44 times [2018-09-26 21:17:05,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:05,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:05,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:05,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:05,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:07,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:07,065 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 [2018-09-26 21:17:07,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:07,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:07,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:07,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:07,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:07,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:17:07,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:17:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:17:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:17:07,186 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 48 states. [2018-09-26 21:17:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:07,464 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2018-09-26 21:17:07,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:17:07,464 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2018-09-26 21:17:07,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:07,465 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:17:07,465 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:17:07,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:17:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:17:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:17:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:17:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-26 21:17:07,471 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2018-09-26 21:17:07,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:07,472 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-26 21:17:07,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:17:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-26 21:17:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:17:07,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:07,473 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:07,473 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:07,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash -371626724, now seen corresponding path program 45 times [2018-09-26 21:17:07,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:07,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:07,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:07,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:08,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:08,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:08,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:09,012 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-26 21:17:09,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:09,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:09,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:09,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:17:09,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:17:09,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:17:09,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:17:09,067 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 49 states. [2018-09-26 21:17:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:09,231 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2018-09-26 21:17:09,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:17:09,231 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2018-09-26 21:17:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:09,233 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:17:09,233 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:17:09,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:17:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:17:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:17:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:17:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-26 21:17:09,239 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2018-09-26 21:17:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:09,239 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-26 21:17:09,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:17:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-26 21:17:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:17:09,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:09,240 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:09,240 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:09,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash 955837976, now seen corresponding path program 46 times [2018-09-26 21:17:09,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:09,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:09,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:09,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:09,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:11,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:11,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:11,334 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:11,412 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:11,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:11,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:11,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:11,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:17:11,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:17:11,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:17:11,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:17:11,457 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 50 states. [2018-09-26 21:17:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:11,588 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2018-09-26 21:17:11,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:17:11,589 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2018-09-26 21:17:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:11,590 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:17:11,590 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:17:11,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:17:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:17:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:17:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:17:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-26 21:17:11,594 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-26 21:17:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:11,594 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-26 21:17:11,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:17:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-26 21:17:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:17:11,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:11,595 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:11,595 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:11,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:11,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1044127764, now seen corresponding path program 47 times [2018-09-26 21:17:11,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:11,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:11,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:11,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:13,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:13,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:13,366 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:13,477 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:17:13,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:13,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:13,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:13,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:17:13,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:17:13,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:17:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:17:13,537 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 51 states. [2018-09-26 21:17:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:13,797 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2018-09-26 21:17:13,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:17:13,800 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2018-09-26 21:17:13,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:13,801 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:17:13,801 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:17:13,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:17:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:17:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:17:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:17:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-26 21:17:13,808 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2018-09-26 21:17:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:13,808 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-26 21:17:13,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:17:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-26 21:17:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:17:13,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:13,809 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:13,809 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:13,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:13,810 INFO L82 PathProgramCache]: Analyzing trace with hash -8731888, now seen corresponding path program 48 times [2018-09-26 21:17:13,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:13,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:13,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:13,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:13,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:14,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:14,957 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 [2018-09-26 21:17:14,965 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:15,100 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-26 21:17:15,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:15,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:15,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:15,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:17:15,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:17:15,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:17:15,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:17:15,142 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 52 states. [2018-09-26 21:17:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:15,333 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2018-09-26 21:17:15,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:17:15,334 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2018-09-26 21:17:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:15,335 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:17:15,335 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:17:15,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:17:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:17:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:17:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:17:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2018-09-26 21:17:15,341 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2018-09-26 21:17:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:15,341 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2018-09-26 21:17:15,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:17:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2018-09-26 21:17:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:17:15,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:15,342 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:15,343 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:15,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:15,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1805424396, now seen corresponding path program 49 times [2018-09-26 21:17:15,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:15,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:15,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:15,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:16,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:16,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:16,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:16,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:16,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:16,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:17:16,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:17:16,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:17:16,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:17:16,632 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 53 states. [2018-09-26 21:17:17,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:17,037 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2018-09-26 21:17:17,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:17:17,037 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2018-09-26 21:17:17,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:17,038 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:17:17,038 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:17:17,039 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 [2018-09-26 21:17:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:17:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 21:17:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:17:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-26 21:17:17,045 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-26 21:17:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:17,045 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-26 21:17:17,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:17:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-26 21:17:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:17:17,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:17,046 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:17,046 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:17,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1452891144, now seen corresponding path program 50 times [2018-09-26 21:17:17,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:17,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:17,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:17,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:17,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:18,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:18,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:18,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:18,608 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:18,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:18,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:18,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:18,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:17:18,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:17:18,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:17:18,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:17:18,673 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 54 states. [2018-09-26 21:17:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:18,957 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-26 21:17:18,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:17:18,958 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2018-09-26 21:17:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:18,959 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:17:18,959 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:17:18,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:17:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:17:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:17:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:17:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-26 21:17:18,965 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2018-09-26 21:17:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:18,966 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-26 21:17:18,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:17:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-26 21:17:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:17:18,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:18,966 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:18,967 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:18,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1970852356, now seen corresponding path program 51 times [2018-09-26 21:17:18,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:18,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:18,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:18,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:18,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:20,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:20,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:20,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:20,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-26 21:17:20,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:20,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:20,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:20,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:17:20,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:17:20,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:17:20,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:17:20,297 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 55 states. [2018-09-26 21:17:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:20,598 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2018-09-26 21:17:20,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:17:20,598 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2018-09-26 21:17:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:20,599 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:17:20,599 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:17:20,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:17:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:17:20,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 21:17:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:17:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2018-09-26 21:17:20,608 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2018-09-26 21:17:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:20,608 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2018-09-26 21:17:20,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:17:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2018-09-26 21:17:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:17:20,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:20,609 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:20,610 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:20,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1515370752, now seen corresponding path program 52 times [2018-09-26 21:17:20,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:20,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:20,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:20,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:20,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:21,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:21,866 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 [2018-09-26 21:17:21,873 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:21,953 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:21,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:21,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:22,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:22,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:17:22,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:17:22,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:17:22,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:17:22,013 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 56 states. [2018-09-26 21:17:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:22,786 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-26 21:17:22,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:17:22,786 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2018-09-26 21:17:22,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:22,787 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:17:22,787 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:17:22,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:17:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:17:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:17:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:17:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-26 21:17:22,794 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2018-09-26 21:17:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:22,795 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-26 21:17:22,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:17:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-26 21:17:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:17:22,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:22,796 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:22,796 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:22,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:22,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1884213500, now seen corresponding path program 53 times [2018-09-26 21:17:22,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:22,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:22,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:22,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:22,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:23,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:23,967 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 [2018-09-26 21:17:23,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:24,212 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-26 21:17:24,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:24,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:24,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:24,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:17:24,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:17:24,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:17:24,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:17:24,256 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 57 states. [2018-09-26 21:17:24,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:24,470 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2018-09-26 21:17:24,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:17:24,471 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2018-09-26 21:17:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:24,472 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:17:24,472 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:17:24,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:17:24,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:17:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-26 21:17:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:17:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-26 21:17:24,476 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2018-09-26 21:17:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:24,476 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-26 21:17:24,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:17:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-26 21:17:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:17:24,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:24,477 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:24,477 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:24,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:24,478 INFO L82 PathProgramCache]: Analyzing trace with hash -140191240, now seen corresponding path program 54 times [2018-09-26 21:17:24,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:24,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:24,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:24,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:24,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:25,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:25,815 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 [2018-09-26 21:17:25,824 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:25,962 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-26 21:17:25,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:25,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:26,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:26,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:17:26,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:17:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:17:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:17:26,025 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 58 states. [2018-09-26 21:17:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:26,283 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2018-09-26 21:17:26,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:17:26,284 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2018-09-26 21:17:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:26,284 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:17:26,285 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:17:26,285 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 [2018-09-26 21:17:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:17:26,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:17:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:17:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-09-26 21:17:26,291 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2018-09-26 21:17:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:26,291 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-09-26 21:17:26,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:17:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-09-26 21:17:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:17:26,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:26,292 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:26,293 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:26,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash 27038708, now seen corresponding path program 55 times [2018-09-26 21:17:26,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:26,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:26,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:26,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:26,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:27,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:27,521 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 [2018-09-26 21:17:27,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:27,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:27,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:27,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:17:27,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:17:27,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:17:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:17:27,651 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-09-26 21:17:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:27,914 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2018-09-26 21:17:27,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:17:27,914 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-09-26 21:17:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:27,915 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:17:27,915 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:17:27,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:17:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:17:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:17:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:17:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-26 21:17:27,919 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-26 21:17:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:27,920 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-26 21:17:27,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:17:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-26 21:17:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:17:27,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:27,921 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:27,921 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:27,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1821228784, now seen corresponding path program 56 times [2018-09-26 21:17:27,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:27,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:27,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:27,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:27,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:29,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:29,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:29,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:29,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:29,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:29,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:29,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:29,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:17:29,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:17:29,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:17:29,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:17:29,498 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 60 states. [2018-09-26 21:17:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:29,801 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2018-09-26 21:17:29,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:17:29,802 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 130 [2018-09-26 21:17:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:29,803 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:17:29,803 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:17:29,803 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 [2018-09-26 21:17:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:17:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:17:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:17:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-26 21:17:29,809 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 130 [2018-09-26 21:17:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:29,809 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-26 21:17:29,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:17:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-26 21:17:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:17:29,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:29,810 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:29,810 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:29,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:29,810 INFO L82 PathProgramCache]: Analyzing trace with hash -538961172, now seen corresponding path program 57 times [2018-09-26 21:17:29,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:29,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:29,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:29,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:29,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:31,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:31,224 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 [2018-09-26 21:17:31,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:31,383 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-26 21:17:31,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:31,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:31,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:31,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:17:31,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:17:31,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:17:31,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:17:31,429 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 61 states. [2018-09-26 21:17:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:31,522 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2018-09-26 21:17:31,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:17:31,522 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 132 [2018-09-26 21:17:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:31,523 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:17:31,523 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:17:31,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:17:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:17:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-26 21:17:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:17:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-26 21:17:31,528 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 132 [2018-09-26 21:17:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:31,528 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-26 21:17:31,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:17:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-26 21:17:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:17:31,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:31,529 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:31,529 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:31,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash -938776600, now seen corresponding path program 58 times [2018-09-26 21:17:31,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:31,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:31,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:31,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:31,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:33,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:33,066 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 [2018-09-26 21:17:33,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:33,159 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:33,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:33,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:33,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:33,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:17:33,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:17:33,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:17:33,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:17:33,212 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 62 states. [2018-09-26 21:17:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:33,403 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2018-09-26 21:17:33,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:17:33,404 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 134 [2018-09-26 21:17:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:33,404 INFO L225 Difference]: With dead ends: 151 [2018-09-26 21:17:33,404 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:17:33,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:17:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:17:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:17:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:17:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-26 21:17:33,410 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-26 21:17:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:33,410 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-26 21:17:33,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:17:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-26 21:17:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:17:33,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:33,411 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:33,411 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:33,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:33,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1385653732, now seen corresponding path program 59 times [2018-09-26 21:17:33,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:33,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:33,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:33,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:33,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:34,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:34,815 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 [2018-09-26 21:17:34,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:34,974 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-26 21:17:34,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:34,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:35,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:35,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:17:35,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:17:35,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:17:35,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:17:35,067 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 63 states. [2018-09-26 21:17:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:35,221 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2018-09-26 21:17:35,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:17:35,221 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 136 [2018-09-26 21:17:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:35,222 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:17:35,223 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:17:35,223 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 [2018-09-26 21:17:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:17:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:17:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:17:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-26 21:17:35,228 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 136 [2018-09-26 21:17:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:35,229 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-26 21:17:35,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:17:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-26 21:17:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:17:35,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:35,230 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:35,230 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:35,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1780208864, now seen corresponding path program 60 times [2018-09-26 21:17:35,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:35,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:35,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:35,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:35,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:36,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:36,704 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 [2018-09-26 21:17:36,712 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:36,869 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-26 21:17:36,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:36,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:36,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:36,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:17:36,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:17:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:17:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:17:36,922 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 64 states. [2018-09-26 21:17:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:37,046 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2018-09-26 21:17:37,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:17:37,047 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 138 [2018-09-26 21:17:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:37,048 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:17:37,048 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:17:37,049 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 [2018-09-26 21:17:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:17:37,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:17:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:17:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-26 21:17:37,055 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 138 [2018-09-26 21:17:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:37,055 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-26 21:17:37,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:17:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-26 21:17:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:17:37,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:37,056 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:37,056 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:37,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:37,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1304398628, now seen corresponding path program 61 times [2018-09-26 21:17:37,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:37,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:37,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:37,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:37,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:38,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:38,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:38,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:38,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:38,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:38,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:17:38,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:17:38,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:17:38,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:17:38,998 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 65 states. [2018-09-26 21:17:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:39,200 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-26 21:17:39,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:17:39,201 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 140 [2018-09-26 21:17:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:39,201 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:17:39,201 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:17:39,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:17:39,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:17:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-26 21:17:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:17:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-26 21:17:39,207 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-26 21:17:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:39,207 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-26 21:17:39,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:17:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-26 21:17:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:17:39,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:39,208 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:39,208 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:39,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:39,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2084764200, now seen corresponding path program 62 times [2018-09-26 21:17:39,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:39,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:39,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:39,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:39,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:41,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:41,074 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 [2018-09-26 21:17:41,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:41,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:41,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:41,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:41,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:41,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:17:41,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:17:41,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:17:41,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:17:41,226 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 66 states. [2018-09-26 21:17:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:41,764 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2018-09-26 21:17:41,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:17:41,765 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 142 [2018-09-26 21:17:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:41,766 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:17:41,766 INFO L226 Difference]: Without dead ends: 145 [2018-09-26 21:17:41,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:17:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-26 21:17:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-26 21:17:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:17:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-26 21:17:41,775 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 142 [2018-09-26 21:17:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:41,775 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-26 21:17:41,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:17:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-26 21:17:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:17:41,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:41,776 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:41,777 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:41,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -396802092, now seen corresponding path program 63 times [2018-09-26 21:17:41,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:41,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:41,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:41,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:41,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:43,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:43,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:43,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:43,972 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-26 21:17:43,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:43,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:44,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:44,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:17:44,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:17:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:17:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:17:44,020 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 67 states. [2018-09-26 21:17:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:44,216 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2018-09-26 21:17:44,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:17:44,216 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 144 [2018-09-26 21:17:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:44,218 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:17:44,218 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:17:44,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:17:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:17:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-26 21:17:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:17:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-09-26 21:17:44,225 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 144 [2018-09-26 21:17:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:44,225 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-09-26 21:17:44,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:17:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-09-26 21:17:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:17:44,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:44,226 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:44,226 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:44,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:44,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1762854192, now seen corresponding path program 64 times [2018-09-26 21:17:44,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:44,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:44,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:44,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:44,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:45,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:45,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:45,892 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:45,987 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:45,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:45,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:46,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:46,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:17:46,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:17:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:17:46,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:17:46,062 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 68 states. [2018-09-26 21:17:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:46,281 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2018-09-26 21:17:46,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:17:46,281 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 146 [2018-09-26 21:17:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:46,282 INFO L225 Difference]: With dead ends: 163 [2018-09-26 21:17:46,282 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:17:46,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:17:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:17:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:17:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:17:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-26 21:17:46,289 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-26 21:17:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:46,290 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-26 21:17:46,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:17:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-26 21:17:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:17:46,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:46,291 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:46,291 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:46,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:46,291 INFO L82 PathProgramCache]: Analyzing trace with hash -278929716, now seen corresponding path program 65 times [2018-09-26 21:17:46,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:46,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:46,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:46,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:46,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:48,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:48,124 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 [2018-09-26 21:17:48,132 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:48,326 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-26 21:17:48,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:48,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:48,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:48,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:17:48,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:17:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:17:48,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:17:48,395 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 69 states. [2018-09-26 21:17:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:48,640 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2018-09-26 21:17:48,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:17:48,641 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 148 [2018-09-26 21:17:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:48,642 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:17:48,642 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:17:48,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:17:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:17:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-26 21:17:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:17:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-26 21:17:48,651 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2018-09-26 21:17:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:48,651 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-26 21:17:48,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:17:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-26 21:17:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-26 21:17:48,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:48,652 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:48,653 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:48,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash -156650552, now seen corresponding path program 66 times [2018-09-26 21:17:48,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:48,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:48,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:48,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:48,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:50,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:50,510 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 [2018-09-26 21:17:50,517 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:50,695 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-26 21:17:50,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:50,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:50,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:50,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:17:50,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:17:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:17:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:17:50,761 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 70 states. [2018-09-26 21:17:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:50,972 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2018-09-26 21:17:50,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:17:50,972 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 150 [2018-09-26 21:17:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:50,973 INFO L225 Difference]: With dead ends: 167 [2018-09-26 21:17:50,973 INFO L226 Difference]: Without dead ends: 153 [2018-09-26 21:17:50,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:17:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-26 21:17:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-26 21:17:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-26 21:17:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2018-09-26 21:17:50,978 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2018-09-26 21:17:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:50,978 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2018-09-26 21:17:50,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:17:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2018-09-26 21:17:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:17:50,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:50,979 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:50,979 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:50,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1389509060, now seen corresponding path program 67 times [2018-09-26 21:17:50,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:50,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:50,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:50,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:50,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:52,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:52,760 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 [2018-09-26 21:17:52,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:52,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:52,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:52,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:17:52,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:17:52,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:17:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:17:52,922 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 71 states. [2018-09-26 21:17:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:53,139 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2018-09-26 21:17:53,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:17:53,139 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 152 [2018-09-26 21:17:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:53,140 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:17:53,140 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:17:53,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:17:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:17:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-26 21:17:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:17:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-26 21:17:53,146 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-26 21:17:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:53,146 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-26 21:17:53,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:17:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-26 21:17:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:17:53,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:53,147 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:53,147 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:53,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:53,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1190211776, now seen corresponding path program 68 times [2018-09-26 21:17:53,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:53,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:53,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:53,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:53,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:55,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:55,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:55,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:55,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:55,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:55,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:55,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:55,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:17:55,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:17:55,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:17:55,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:17:55,443 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 72 states. [2018-09-26 21:17:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:56,059 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-09-26 21:17:56,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:17:56,060 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 154 [2018-09-26 21:17:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:56,060 INFO L225 Difference]: With dead ends: 171 [2018-09-26 21:17:56,060 INFO L226 Difference]: Without dead ends: 157 [2018-09-26 21:17:56,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:17:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-26 21:17:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-26 21:17:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-26 21:17:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-26 21:17:56,066 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 154 [2018-09-26 21:17:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:56,066 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-26 21:17:56,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:17:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-26 21:17:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-26 21:17:56,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:56,067 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:56,067 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:56,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1355917124, now seen corresponding path program 69 times [2018-09-26 21:17:56,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:56,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:56,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:57,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:57,933 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 [2018-09-26 21:17:57,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:58,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-26 21:17:58,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:58,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:17:58,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:58,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:17:58,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:17:58,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:17:58,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:17:58,196 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 73 states. [2018-09-26 21:17:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:58,335 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2018-09-26 21:17:58,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:17:58,336 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 156 [2018-09-26 21:17:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:58,337 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:17:58,337 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:17:58,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:17:58,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:17:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-26 21:17:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-26 21:17:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2018-09-26 21:17:58,343 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 156 [2018-09-26 21:17:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:58,344 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2018-09-26 21:17:58,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:17:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2018-09-26 21:17:58,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:17:58,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:58,345 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:17:58,345 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:58,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash -54431304, now seen corresponding path program 70 times [2018-09-26 21:17:58,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:58,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:58,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:58,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:58,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:00,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:00,440 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 [2018-09-26 21:18:00,447 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:00,558 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:00,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:00,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:00,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:00,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:18:00,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:18:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:18:00,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:18:00,619 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 74 states. [2018-09-26 21:18:00,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:00,861 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-26 21:18:00,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:18:00,862 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 158 [2018-09-26 21:18:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:00,863 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:18:00,863 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:18:00,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:18:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:18:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:18:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:18:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-26 21:18:00,870 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2018-09-26 21:18:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:00,870 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-26 21:18:00,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:18:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-26 21:18:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-26 21:18:00,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:00,872 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:00,872 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:00,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash 837958580, now seen corresponding path program 71 times [2018-09-26 21:18:00,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:00,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:00,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:00,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:00,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:02,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:02,904 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 [2018-09-26 21:18:02,911 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:03,123 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-26 21:18:03,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:03,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:03,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:03,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:18:03,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:18:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:18:03,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:18:03,177 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 75 states. [2018-09-26 21:18:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:03,354 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2018-09-26 21:18:03,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:18:03,355 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 160 [2018-09-26 21:18:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:03,356 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:18:03,356 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:18:03,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:18:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:18:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-26 21:18:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:18:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-26 21:18:03,365 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 160 [2018-09-26 21:18:03,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:03,365 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-26 21:18:03,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:18:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-26 21:18:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:18:03,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:03,366 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:03,366 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:03,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash -568822096, now seen corresponding path program 72 times [2018-09-26 21:18:03,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:03,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:03,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:03,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:03,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:05,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:05,717 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 [2018-09-26 21:18:05,724 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:05,974 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-26 21:18:05,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:05,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:06,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:06,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:18:06,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:18:06,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:18:06,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:18:06,028 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 76 states. [2018-09-26 21:18:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:06,296 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2018-09-26 21:18:06,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:18:06,296 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 162 [2018-09-26 21:18:06,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:06,297 INFO L225 Difference]: With dead ends: 179 [2018-09-26 21:18:06,298 INFO L226 Difference]: Without dead ends: 165 [2018-09-26 21:18:06,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:18:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-26 21:18:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-26 21:18:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:18:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-26 21:18:06,305 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 162 [2018-09-26 21:18:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:06,305 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-26 21:18:06,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:18:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-26 21:18:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:18:06,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:06,306 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:06,306 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:06,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:06,307 INFO L82 PathProgramCache]: Analyzing trace with hash 429646508, now seen corresponding path program 73 times [2018-09-26 21:18:06,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:06,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:06,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:06,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:06,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:08,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:08,393 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 [2018-09-26 21:18:08,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:08,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:08,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:08,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:18:08,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:18:08,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:18:08,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:18:08,572 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 77 states. [2018-09-26 21:18:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:08,811 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2018-09-26 21:18:08,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:18:08,811 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 164 [2018-09-26 21:18:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:08,812 INFO L225 Difference]: With dead ends: 181 [2018-09-26 21:18:08,812 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:18:08,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:18:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:18:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-26 21:18:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:18:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-26 21:18:08,817 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-26 21:18:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:08,818 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-26 21:18:08,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:18:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-26 21:18:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-26 21:18:08,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:08,819 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:08,819 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:08,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2114699352, now seen corresponding path program 74 times [2018-09-26 21:18:08,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:08,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:08,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:08,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:08,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:10,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:10,987 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 [2018-09-26 21:18:10,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:11,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:11,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:11,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:11,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:11,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:18:11,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:18:11,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:18:11,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:18:11,176 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 78 states. [2018-09-26 21:18:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:11,357 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2018-09-26 21:18:11,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:18:11,358 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 166 [2018-09-26 21:18:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:11,359 INFO L225 Difference]: With dead ends: 183 [2018-09-26 21:18:11,359 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:18:11,360 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 [2018-09-26 21:18:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:18:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-26 21:18:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:18:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-26 21:18:11,366 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 166 [2018-09-26 21:18:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:11,366 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-26 21:18:11,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:18:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-26 21:18:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:18:11,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:11,367 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:11,367 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:11,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash 900287908, now seen corresponding path program 75 times [2018-09-26 21:18:11,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:11,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:11,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:11,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:11,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:13,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:13,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:18:13,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:13,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-09-26 21:18:13,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:13,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:13,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:13,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:18:13,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:18:13,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:18:13,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:18:13,924 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 79 states. [2018-09-26 21:18:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:14,136 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2018-09-26 21:18:14,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:18:14,137 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 168 [2018-09-26 21:18:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:14,138 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:18:14,138 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:18:14,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:18:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:18:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-26 21:18:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:18:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-26 21:18:14,143 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 168 [2018-09-26 21:18:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:14,143 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-26 21:18:14,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:18:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-26 21:18:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:18:14,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:14,144 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:14,144 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:14,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash -799880032, now seen corresponding path program 76 times [2018-09-26 21:18:14,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:14,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:14,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:14,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:14,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:16,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:16,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:18:16,456 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:16,570 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:16,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:16,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:16,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:16,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:18:16,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:18:16,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:18:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:18:16,624 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 80 states. [2018-09-26 21:18:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:16,793 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2018-09-26 21:18:16,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:18:16,793 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 170 [2018-09-26 21:18:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:16,794 INFO L225 Difference]: With dead ends: 187 [2018-09-26 21:18:16,794 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:18:16,794 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 [2018-09-26 21:18:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:18:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:18:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:18:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-26 21:18:16,800 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-26 21:18:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:16,801 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-26 21:18:16,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:18:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-26 21:18:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:18:16,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:16,802 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:16,802 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:16,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1721269404, now seen corresponding path program 77 times [2018-09-26 21:18:16,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:16,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:16,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:16,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:16,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:19,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:19,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:18:19,490 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:19,710 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-26 21:18:19,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:19,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:19,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:19,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:18:19,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:18:19,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:18:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:18:19,775 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 81 states. [2018-09-26 21:18:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:19,969 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2018-09-26 21:18:19,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:18:19,969 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 172 [2018-09-26 21:18:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:19,970 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:18:19,970 INFO L226 Difference]: Without dead ends: 175 [2018-09-26 21:18:19,971 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 [2018-09-26 21:18:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-26 21:18:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-26 21:18:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:18:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-26 21:18:19,977 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 172 [2018-09-26 21:18:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:19,978 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-26 21:18:19,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:18:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-26 21:18:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-26 21:18:19,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:19,979 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:19,979 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:19,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:19,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2110644840, now seen corresponding path program 78 times [2018-09-26 21:18:19,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:19,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:19,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:19,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:19,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:22,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:22,393 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 [2018-09-26 21:18:22,401 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:22,625 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-09-26 21:18:22,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:22,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:22,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:22,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:18:22,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:18:22,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:18:22,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:18:22,684 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 82 states. [2018-09-26 21:18:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:22,989 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2018-09-26 21:18:22,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:18:22,989 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 174 [2018-09-26 21:18:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:22,991 INFO L225 Difference]: With dead ends: 191 [2018-09-26 21:18:22,991 INFO L226 Difference]: Without dead ends: 177 [2018-09-26 21:18:22,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:18:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-26 21:18:22,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-26 21:18:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-26 21:18:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-09-26 21:18:22,996 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2018-09-26 21:18:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:22,996 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-09-26 21:18:22,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:18:22,997 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-09-26 21:18:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-26 21:18:22,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:22,998 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:22,998 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:22,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:22,998 INFO L82 PathProgramCache]: Analyzing trace with hash 501706644, now seen corresponding path program 79 times [2018-09-26 21:18:22,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:22,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:22,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:22,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:22,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:25,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:25,688 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 [2018-09-26 21:18:25,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:25,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:25,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:25,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-26 21:18:25,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:18:25,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:18:25,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:18:25,865 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 83 states. [2018-09-26 21:18:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:26,059 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-26 21:18:26,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:18:26,059 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 176 [2018-09-26 21:18:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:26,061 INFO L225 Difference]: With dead ends: 193 [2018-09-26 21:18:26,061 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:18:26,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:18:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:18:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-26 21:18:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:18:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2018-09-26 21:18:26,067 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2018-09-26 21:18:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:26,068 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2018-09-26 21:18:26,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:18:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2018-09-26 21:18:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:18:26,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:26,069 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:26,069 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:26,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1584385392, now seen corresponding path program 80 times [2018-09-26 21:18:26,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:26,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:26,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:26,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:26,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:28,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:28,515 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 [2018-09-26 21:18:28,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:28,639 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:28,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:28,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:28,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:28,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:18:28,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:18:28,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:18:28,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:18:28,698 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 84 states. [2018-09-26 21:18:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:29,028 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-26 21:18:29,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:18:29,029 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 178 [2018-09-26 21:18:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:29,030 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:18:29,030 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:18:29,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:18:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:18:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:18:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:18:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-26 21:18:29,036 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2018-09-26 21:18:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:29,036 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-26 21:18:29,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:18:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-26 21:18:29,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-26 21:18:29,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:29,037 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:29,037 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:29,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:29,037 INFO L82 PathProgramCache]: Analyzing trace with hash -569104756, now seen corresponding path program 81 times [2018-09-26 21:18:29,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:29,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:29,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:29,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:29,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:31,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:31,970 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 [2018-09-26 21:18:31,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:32,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-09-26 21:18:32,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:32,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:32,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:32,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-26 21:18:32,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:18:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:18:32,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:18:32,323 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 85 states. [2018-09-26 21:18:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:32,523 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2018-09-26 21:18:32,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:18:32,523 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 180 [2018-09-26 21:18:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:32,524 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:18:32,524 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:18:32,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:18:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:18:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-26 21:18:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-26 21:18:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2018-09-26 21:18:32,531 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2018-09-26 21:18:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:32,532 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2018-09-26 21:18:32,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:18:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2018-09-26 21:18:32,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:18:32,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:32,533 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:32,533 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:32,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:32,534 INFO L82 PathProgramCache]: Analyzing trace with hash 158010248, now seen corresponding path program 82 times [2018-09-26 21:18:32,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:32,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:32,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:32,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:32,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:35,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:35,356 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 [2018-09-26 21:18:35,363 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:35,485 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:35,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:35,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:35,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:35,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:18:35,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:18:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:18:35,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:18:35,544 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 86 states. [2018-09-26 21:18:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:35,761 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2018-09-26 21:18:35,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:18:35,761 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 182 [2018-09-26 21:18:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:35,763 INFO L225 Difference]: With dead ends: 199 [2018-09-26 21:18:35,763 INFO L226 Difference]: Without dead ends: 185 [2018-09-26 21:18:35,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:18:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-26 21:18:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-26 21:18:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:18:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-26 21:18:35,770 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-26 21:18:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:35,771 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-26 21:18:35,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:18:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-26 21:18:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-26 21:18:35,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:35,772 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:35,772 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:35,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1164140156, now seen corresponding path program 83 times [2018-09-26 21:18:35,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:35,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:35,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:35,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:35,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:38,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:38,420 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 [2018-09-26 21:18:38,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:38,695 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-26 21:18:38,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:38,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:38,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:38,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-26 21:18:38,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:18:38,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:18:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:18:38,759 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 87 states. [2018-09-26 21:18:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:39,121 INFO L93 Difference]: Finished difference Result 201 states and 205 transitions. [2018-09-26 21:18:39,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:18:39,122 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 184 [2018-09-26 21:18:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:39,123 INFO L225 Difference]: With dead ends: 201 [2018-09-26 21:18:39,123 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:18:39,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:18:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:18:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-26 21:18:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-26 21:18:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-26 21:18:39,131 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 184 [2018-09-26 21:18:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:39,131 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-26 21:18:39,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:18:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-26 21:18:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-26 21:18:39,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:39,132 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:39,133 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:39,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -440358784, now seen corresponding path program 84 times [2018-09-26 21:18:39,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:39,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:39,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:39,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:39,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:42,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:42,207 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 [2018-09-26 21:18:42,215 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:42,484 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-26 21:18:42,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:42,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:42,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:42,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:18:42,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:18:42,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:18:42,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:18:42,546 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 88 states. [2018-09-26 21:18:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:42,874 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-09-26 21:18:42,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:18:42,875 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 186 [2018-09-26 21:18:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:42,876 INFO L225 Difference]: With dead ends: 203 [2018-09-26 21:18:42,876 INFO L226 Difference]: Without dead ends: 189 [2018-09-26 21:18:42,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:18:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-26 21:18:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-26 21:18:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-26 21:18:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-09-26 21:18:42,885 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 186 [2018-09-26 21:18:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:42,885 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-09-26 21:18:42,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:18:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-09-26 21:18:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:18:42,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:42,886 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:42,887 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:42,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:42,887 INFO L82 PathProgramCache]: Analyzing trace with hash -671162244, now seen corresponding path program 85 times [2018-09-26 21:18:42,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:42,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:42,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:42,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:42,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:45,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:45,981 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 [2018-09-26 21:18:45,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:46,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:46,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:46,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-26 21:18:46,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:18:46,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:18:46,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:18:46,172 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 89 states. [2018-09-26 21:18:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:46,416 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2018-09-26 21:18:46,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:18:46,416 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 188 [2018-09-26 21:18:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:46,417 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:18:46,417 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:18:46,418 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 [2018-09-26 21:18:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:18:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-26 21:18:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:18:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-26 21:18:46,424 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-26 21:18:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:46,424 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-26 21:18:46,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:18:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-26 21:18:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-26 21:18:46,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:46,425 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:46,425 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:46,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash 865012088, now seen corresponding path program 86 times [2018-09-26 21:18:46,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:46,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:46,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:46,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:46,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:49,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:49,406 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 [2018-09-26 21:18:49,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:49,541 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:49,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:49,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:49,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:49,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:18:49,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:18:49,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:18:49,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:18:49,604 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 90 states. [2018-09-26 21:18:49,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:49,817 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2018-09-26 21:18:49,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:18:49,818 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 190 [2018-09-26 21:18:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:49,818 INFO L225 Difference]: With dead ends: 207 [2018-09-26 21:18:49,819 INFO L226 Difference]: Without dead ends: 193 [2018-09-26 21:18:49,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:18:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-26 21:18:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-26 21:18:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-26 21:18:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-26 21:18:49,824 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 190 [2018-09-26 21:18:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:49,825 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-26 21:18:49,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:18:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-26 21:18:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-26 21:18:49,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:49,825 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:49,826 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:49,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:49,826 INFO L82 PathProgramCache]: Analyzing trace with hash -340204684, now seen corresponding path program 87 times [2018-09-26 21:18:49,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:49,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:49,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:49,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:49,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:52,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:52,834 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 [2018-09-26 21:18:52,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:53,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-09-26 21:18:53,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:53,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:53,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:53,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-26 21:18:53,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:18:53,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:18:53,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:18:53,189 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 91 states. [2018-09-26 21:18:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:53,493 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2018-09-26 21:18:53,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:18:53,494 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 192 [2018-09-26 21:18:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:53,495 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:18:53,495 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:18:53,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:18:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:18:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-26 21:18:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:18:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-26 21:18:53,502 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 192 [2018-09-26 21:18:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:53,502 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-26 21:18:53,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:18:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-26 21:18:53,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-26 21:18:53,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:53,503 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:53,503 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:53,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:53,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1087647344, now seen corresponding path program 88 times [2018-09-26 21:18:53,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:53,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:53,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:53,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:53,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:56,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:56,760 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 [2018-09-26 21:18:56,768 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:56,895 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:56,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:56,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:18:56,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:56,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:18:56,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:18:56,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:18:56,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:18:56,959 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 92 states. [2018-09-26 21:18:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:57,220 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-26 21:18:57,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:18:57,220 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 194 [2018-09-26 21:18:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:57,221 INFO L225 Difference]: With dead ends: 211 [2018-09-26 21:18:57,221 INFO L226 Difference]: Without dead ends: 197 [2018-09-26 21:18:57,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:18:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-26 21:18:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-26 21:18:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-26 21:18:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2018-09-26 21:18:57,231 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 194 [2018-09-26 21:18:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:57,231 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2018-09-26 21:18:57,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:18:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2018-09-26 21:18:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-26 21:18:57,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:57,232 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:18:57,233 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:57,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:57,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1136088468, now seen corresponding path program 89 times [2018-09-26 21:18:57,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:57,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:57,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:57,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:57,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:00,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:00,586 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 [2018-09-26 21:19:00,596 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:00,901 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-09-26 21:19:00,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:00,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:00,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:00,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-26 21:19:00,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:19:00,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:19:00,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:19:00,967 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 93 states. [2018-09-26 21:19:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:01,336 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2018-09-26 21:19:01,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:19:01,336 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 196 [2018-09-26 21:19:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:01,338 INFO L225 Difference]: With dead ends: 213 [2018-09-26 21:19:01,338 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:19:01,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:19:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:19:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-26 21:19:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-26 21:19:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-26 21:19:01,344 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 196 [2018-09-26 21:19:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:01,344 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-26 21:19:01,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:19:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-26 21:19:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-26 21:19:01,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:01,345 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:01,345 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:01,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 747509608, now seen corresponding path program 90 times [2018-09-26 21:19:01,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:01,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:01,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:01,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:01,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:04,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:04,478 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 [2018-09-26 21:19:04,485 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:04,767 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-09-26 21:19:04,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:04,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:04,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:04,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:19:04,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:19:04,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:19:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:19:04,847 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 94 states. [2018-09-26 21:19:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:05,085 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2018-09-26 21:19:05,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:19:05,085 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 198 [2018-09-26 21:19:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:05,086 INFO L225 Difference]: With dead ends: 215 [2018-09-26 21:19:05,086 INFO L226 Difference]: Without dead ends: 201 [2018-09-26 21:19:05,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:19:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-26 21:19:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-26 21:19:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-26 21:19:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-26 21:19:05,092 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 198 [2018-09-26 21:19:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:05,092 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-26 21:19:05,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:19:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-26 21:19:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-26 21:19:05,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:05,093 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:05,093 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:05,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1590938268, now seen corresponding path program 91 times [2018-09-26 21:19:05,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:05,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:05,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:05,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:05,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:08,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:08,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:19:08,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:08,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:08,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:08,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-26 21:19:08,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:19:08,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:19:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:19:08,549 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 95 states. [2018-09-26 21:19:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:08,769 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2018-09-26 21:19:08,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:19:08,769 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 200 [2018-09-26 21:19:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:08,771 INFO L225 Difference]: With dead ends: 217 [2018-09-26 21:19:08,771 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:19:08,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:19:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:19:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-26 21:19:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-26 21:19:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-26 21:19:08,777 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-26 21:19:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:08,777 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-26 21:19:08,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:19:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-26 21:19:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-26 21:19:08,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:08,778 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:08,779 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:08,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1723516000, now seen corresponding path program 92 times [2018-09-26 21:19:08,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:08,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:08,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:08,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:08,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:12,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:12,985 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 [2018-09-26 21:19:12,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:13,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:13,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:13,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:13,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:13,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:19:13,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:19:13,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:19:13,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:19:13,194 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 96 states. [2018-09-26 21:19:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:13,449 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2018-09-26 21:19:13,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:19:13,449 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 202 [2018-09-26 21:19:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:13,450 INFO L225 Difference]: With dead ends: 219 [2018-09-26 21:19:13,450 INFO L226 Difference]: Without dead ends: 205 [2018-09-26 21:19:13,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:19:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-26 21:19:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-26 21:19:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-26 21:19:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-26 21:19:13,459 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2018-09-26 21:19:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:13,459 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-26 21:19:13,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:19:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-26 21:19:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-26 21:19:13,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:13,460 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:13,460 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:13,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:13,461 INFO L82 PathProgramCache]: Analyzing trace with hash 48333916, now seen corresponding path program 93 times [2018-09-26 21:19:13,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:13,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:13,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:13,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:13,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:17,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:17,159 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 [2018-09-26 21:19:17,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:17,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2018-09-26 21:19:17,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:17,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:17,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:17,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-26 21:19:17,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:19:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:19:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:19:17,585 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 97 states. [2018-09-26 21:19:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:17,847 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2018-09-26 21:19:17,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:19:17,848 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 204 [2018-09-26 21:19:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:17,849 INFO L225 Difference]: With dead ends: 221 [2018-09-26 21:19:17,849 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:19:17,850 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 [2018-09-26 21:19:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:19:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-26 21:19:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-26 21:19:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2018-09-26 21:19:17,856 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2018-09-26 21:19:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:17,856 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2018-09-26 21:19:17,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:19:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2018-09-26 21:19:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-26 21:19:17,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:17,857 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:17,858 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:17,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:17,858 INFO L82 PathProgramCache]: Analyzing trace with hash 811087192, now seen corresponding path program 94 times [2018-09-26 21:19:17,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:17,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:17,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:17,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:17,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:21,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:21,555 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 [2018-09-26 21:19:21,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:21,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:21,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:21,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:21,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:21,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:19:21,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:19:21,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:19:21,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:19:21,773 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 98 states. [2018-09-26 21:19:22,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:22,002 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2018-09-26 21:19:22,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:19:22,002 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 206 [2018-09-26 21:19:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:22,004 INFO L225 Difference]: With dead ends: 223 [2018-09-26 21:19:22,004 INFO L226 Difference]: Without dead ends: 209 [2018-09-26 21:19:22,004 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 [2018-09-26 21:19:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-26 21:19:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-26 21:19:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-26 21:19:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-26 21:19:22,010 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-26 21:19:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:22,011 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-26 21:19:22,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:19:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-26 21:19:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-26 21:19:22,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:22,012 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:22,012 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:22,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:22,012 INFO L82 PathProgramCache]: Analyzing trace with hash -622422188, now seen corresponding path program 95 times [2018-09-26 21:19:22,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:22,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:22,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:22,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:22,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:25,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:25,434 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 [2018-09-26 21:19:25,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:25,763 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2018-09-26 21:19:25,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:25,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:25,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:25,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-26 21:19:25,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 21:19:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 21:19:25,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:19:25,830 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 99 states. [2018-09-26 21:19:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:26,213 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-26 21:19:26,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:19:26,213 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 208 [2018-09-26 21:19:26,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:26,215 INFO L225 Difference]: With dead ends: 225 [2018-09-26 21:19:26,215 INFO L226 Difference]: Without dead ends: 211 [2018-09-26 21:19:26,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:19:26,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-26 21:19:26,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-26 21:19:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-26 21:19:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-26 21:19:26,221 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 208 [2018-09-26 21:19:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:26,221 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-26 21:19:26,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 21:19:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-26 21:19:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-26 21:19:26,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:26,222 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:26,222 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:26,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:26,223 INFO L82 PathProgramCache]: Analyzing trace with hash 459565648, now seen corresponding path program 96 times [2018-09-26 21:19:26,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:26,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:26,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:26,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:26,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:29,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:29,806 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 [2018-09-26 21:19:29,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:30,136 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2018-09-26 21:19:30,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:30,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:30,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:30,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:19:30,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:19:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:19:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:19:30,204 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 100 states. [2018-09-26 21:19:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:30,512 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2018-09-26 21:19:30,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:19:30,512 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 210 [2018-09-26 21:19:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:30,513 INFO L225 Difference]: With dead ends: 227 [2018-09-26 21:19:30,514 INFO L226 Difference]: Without dead ends: 213 [2018-09-26 21:19:30,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:19:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-26 21:19:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-26 21:19:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-26 21:19:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2018-09-26 21:19:30,521 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 210 [2018-09-26 21:19:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:30,521 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2018-09-26 21:19:30,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:19:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2018-09-26 21:19:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-26 21:19:30,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:30,522 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:30,522 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:30,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:30,523 INFO L82 PathProgramCache]: Analyzing trace with hash 867790412, now seen corresponding path program 97 times [2018-09-26 21:19:30,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:30,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:30,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:30,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:30,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:34,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:34,464 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 [2018-09-26 21:19:34,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:34,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:34,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:34,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-26 21:19:34,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:19:34,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:19:34,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:19:34,677 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 101 states. [2018-09-26 21:19:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:34,990 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-26 21:19:34,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:19:34,991 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 212 [2018-09-26 21:19:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:34,992 INFO L225 Difference]: With dead ends: 229 [2018-09-26 21:19:34,992 INFO L226 Difference]: Without dead ends: 215 [2018-09-26 21:19:34,993 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 [2018-09-26 21:19:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-26 21:19:35,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-26 21:19:35,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-26 21:19:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-26 21:19:35,001 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 212 [2018-09-26 21:19:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:35,001 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-26 21:19:35,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:19:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-26 21:19:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-26 21:19:35,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:35,002 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:35,002 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:35,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:35,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1965202616, now seen corresponding path program 98 times [2018-09-26 21:19:35,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:35,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:35,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:35,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:35,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:39,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:39,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:19:39,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:39,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:39,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:39,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:39,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:39,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:19:39,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:19:39,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:19:39,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:19:39,265 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 102 states. [2018-09-26 21:19:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:39,637 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2018-09-26 21:19:39,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:19:39,638 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 214 [2018-09-26 21:19:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:39,639 INFO L225 Difference]: With dead ends: 231 [2018-09-26 21:19:39,639 INFO L226 Difference]: Without dead ends: 217 [2018-09-26 21:19:39,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:19:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-26 21:19:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-26 21:19:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-26 21:19:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-09-26 21:19:39,649 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 214 [2018-09-26 21:19:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:39,649 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-09-26 21:19:39,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:19:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-09-26 21:19:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-26 21:19:39,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:39,650 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:39,650 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:39,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1462236860, now seen corresponding path program 99 times [2018-09-26 21:19:39,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:39,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:39,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:39,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:39,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:43,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:43,797 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 [2018-09-26 21:19:43,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:44,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2018-09-26 21:19:44,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:44,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:44,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:44,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-26 21:19:44,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:19:44,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:19:44,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:19:44,228 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 103 states. [2018-09-26 21:19:44,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:44,667 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2018-09-26 21:19:44,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:19:44,667 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 216 [2018-09-26 21:19:44,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:44,668 INFO L225 Difference]: With dead ends: 233 [2018-09-26 21:19:44,668 INFO L226 Difference]: Without dead ends: 219 [2018-09-26 21:19:44,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:19:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-26 21:19:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-26 21:19:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-26 21:19:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2018-09-26 21:19:44,677 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 216 [2018-09-26 21:19:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:44,677 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2018-09-26 21:19:44,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:19:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2018-09-26 21:19:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-26 21:19:44,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:44,679 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:44,679 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:44,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:44,679 INFO L82 PathProgramCache]: Analyzing trace with hash 851517504, now seen corresponding path program 100 times [2018-09-26 21:19:44,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:44,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:44,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:44,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:44,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:48,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:48,944 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 [2018-09-26 21:19:48,951 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:49,094 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:49,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:49,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:49,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:49,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-26 21:19:49,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:19:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:19:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:19:49,186 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 104 states. [2018-09-26 21:19:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:49,667 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-09-26 21:19:49,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:19:49,668 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 218 [2018-09-26 21:19:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:49,668 INFO L225 Difference]: With dead ends: 235 [2018-09-26 21:19:49,668 INFO L226 Difference]: Without dead ends: 221 [2018-09-26 21:19:49,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:19:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-26 21:19:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-26 21:19:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-26 21:19:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-26 21:19:49,675 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-09-26 21:19:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:49,675 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-26 21:19:49,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:19:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-26 21:19:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-26 21:19:49,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:49,676 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:49,677 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:49,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -423598020, now seen corresponding path program 101 times [2018-09-26 21:19:49,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:49,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:49,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:49,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:49,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:54,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:54,003 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 [2018-09-26 21:19:54,011 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:54,359 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2018-09-26 21:19:54,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:54,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:54,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:54,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-26 21:19:54,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-26 21:19:54,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-26 21:19:54,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:19:54,432 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 105 states. [2018-09-26 21:19:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:54,932 INFO L93 Difference]: Finished difference Result 237 states and 241 transitions. [2018-09-26 21:19:54,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 21:19:54,933 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 220 [2018-09-26 21:19:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:54,933 INFO L225 Difference]: With dead ends: 237 [2018-09-26 21:19:54,933 INFO L226 Difference]: Without dead ends: 223 [2018-09-26 21:19:54,934 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 [2018-09-26 21:19:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-26 21:19:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-26 21:19:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-26 21:19:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-09-26 21:19:54,943 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 220 [2018-09-26 21:19:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:54,943 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-09-26 21:19:54,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-26 21:19:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-09-26 21:19:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-26 21:19:54,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:54,944 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:19:54,945 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:54,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:54,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1743937224, now seen corresponding path program 102 times [2018-09-26 21:19:54,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:54,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:54,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:54,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:54,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:59,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:59,312 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 [2018-09-26 21:19:59,319 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:59,655 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 104 check-sat command(s) [2018-09-26 21:19:59,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:59,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:19:59,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:59,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-26 21:19:59,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:19:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:19:59,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:19:59,751 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 106 states. [2018-09-26 21:20:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:00,214 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2018-09-26 21:20:00,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 21:20:00,215 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 222 [2018-09-26 21:20:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:00,215 INFO L225 Difference]: With dead ends: 239 [2018-09-26 21:20:00,215 INFO L226 Difference]: Without dead ends: 225 [2018-09-26 21:20:00,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:20:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-26 21:20:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-26 21:20:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-26 21:20:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-26 21:20:00,224 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 222 [2018-09-26 21:20:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:00,224 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-26 21:20:00,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:20:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-26 21:20:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-26 21:20:00,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:00,225 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:20:00,225 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:00,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash 720407348, now seen corresponding path program 103 times [2018-09-26 21:20:00,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:00,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:00,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:00,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:00,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:20:04,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:04,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:04,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:04,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:20:04,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:04,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-26 21:20:04,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:20:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:20:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:20:04,749 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 107 states. [2018-09-26 21:20:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:05,121 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2018-09-26 21:20:05,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-26 21:20:05,122 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 224 [2018-09-26 21:20:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:05,122 INFO L225 Difference]: With dead ends: 241 [2018-09-26 21:20:05,123 INFO L226 Difference]: Without dead ends: 227 [2018-09-26 21:20:05,123 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 [2018-09-26 21:20:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-26 21:20:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-26 21:20:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-26 21:20:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-09-26 21:20:05,132 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-09-26 21:20:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:05,133 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-09-26 21:20:05,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 21:20:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-09-26 21:20:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-26 21:20:05,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:05,134 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:20:05,134 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:05,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:05,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1866406352, now seen corresponding path program 104 times [2018-09-26 21:20:05,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:05,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:05,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:05,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:05,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:20:09,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:09,367 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 [2018-09-26 21:20:09,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:09,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:09,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:09,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:20:09,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:09,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-26 21:20:09,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:20:09,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:20:09,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:20:09,585 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 108 states. [2018-09-26 21:20:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:09,917 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2018-09-26 21:20:09,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-26 21:20:09,918 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 226 [2018-09-26 21:20:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:09,919 INFO L225 Difference]: With dead ends: 243 [2018-09-26 21:20:09,919 INFO L226 Difference]: Without dead ends: 229 [2018-09-26 21:20:09,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:20:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-26 21:20:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-26 21:20:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-26 21:20:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-09-26 21:20:09,926 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 226 [2018-09-26 21:20:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:09,926 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-09-26 21:20:09,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:20:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-09-26 21:20:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-26 21:20:09,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:09,927 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:20:09,927 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:09,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:09,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1008307668, now seen corresponding path program 105 times [2018-09-26 21:20:09,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:09,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:09,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:09,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:09,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:20:14,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:14,367 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 [2018-09-26 21:20:14,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:14,756 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 107 check-sat command(s) [2018-09-26 21:20:14,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:14,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:20:14,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:14,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-26 21:20:14,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-26 21:20:14,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-26 21:20:14,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:20:14,832 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 109 states. [2018-09-26 21:20:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:15,336 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2018-09-26 21:20:15,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-26 21:20:15,336 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 228 [2018-09-26 21:20:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:15,337 INFO L225 Difference]: With dead ends: 245 [2018-09-26 21:20:15,337 INFO L226 Difference]: Without dead ends: 231 [2018-09-26 21:20:15,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:20:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-26 21:20:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-26 21:20:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-26 21:20:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-26 21:20:15,344 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2018-09-26 21:20:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:15,344 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-26 21:20:15,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-26 21:20:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-26 21:20:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-26 21:20:15,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:15,345 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:20:15,345 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:15,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1009193176, now seen corresponding path program 106 times [2018-09-26 21:20:15,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:15,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:15,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:15,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:15,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:20:16,838 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:20:16,842 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:20:16,843 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:20:16 BoogieIcfgContainer [2018-09-26 21:20:16,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:20:16,843 INFO L168 Benchmark]: Toolchain (without parser) took 233790.30 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 242.7 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 439.2 MB). Peak memory consumption was 681.9 MB. Max. memory is 7.1 GB. [2018-09-26 21:20:16,845 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-09-26 21:20:16,845 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.69 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. [2018-09-26 21:20:16,845 INFO L168 Benchmark]: Boogie Preprocessor took 22.57 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. [2018-09-26 21:20:16,845 INFO L168 Benchmark]: RCFGBuilder took 428.30 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. [2018-09-26 21:20:16,846 INFO L168 Benchmark]: TraceAbstraction took 233293.57 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 242.7 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 418.0 MB). Peak memory consumption was 660.8 MB. Max. memory is 7.1 GB. [2018-09-26 21:20:16,848 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.69 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 22.57 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 428.30 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 233293.57 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 242.7 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 418.0 MB). Peak memory consumption was 660.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 83). Cancelled while BasicCegarLoop was analyzing trace of length 231 with TraceHistMax 108, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 59 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 233.2s OverallTime, 110 OverallIterations, 108 TraceHistogramMax, 25.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 981 SDtfs, 31 SDslu, 21858 SDs, 0 SdLazy, 12328 SolverSat, 187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18817 GetRequests, 13033 SyntacticMatches, 0 SemanticMatches, 5784 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 109 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 14.7s SatisfiabilityAnalysisTime, 183.6s InterpolantComputationTime, 26087 NumberOfCodeBlocks, 26087 NumberOfCodeBlocksAsserted, 3093 NumberOfCheckSat, 25872 ConstructedInterpolants, 0 QuantifiedInterpolants, 11175426 SizeOfPredicates, 106 NumberOfNonLiveVariables, 63561 ConjunctsInSsa, 5883 ConjunctsInUnsatCore, 215 InterpolantComputations, 3 PerfectInterpolantSequences, 3792/820416 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-20-16-856.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-0-2018-09-26_21-20-16-856.csv Completed graceful shutdown