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/20170304-DifficultPathPrograms/sum02.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:26:37,865 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:26:37,868 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:26:37,883 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:26:37,884 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:26:37,885 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:26:37,887 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:26:37,889 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:26:37,892 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:26:37,893 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:26:37,895 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:26:37,929 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 21:26:37,943 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:26:37,943 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:26:37,944 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:26:37,944 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:26:37,945 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:26:37,945 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:26:37,945 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:26:37,945 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:26:37,945 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:26:37,946 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:26:37,946 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:26:37,946 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:26:37,946 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:26:37,946 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:26:37,947 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:26:37,947 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:26:37,947 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:26:37,947 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:26:37,947 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:26:37,948 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:26:37,948 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:26:37,948 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:26:37,948 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:26:37,948 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:26:37,949 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:26:37,949 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:26:37,949 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:26:37,949 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:26:37,949 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:26:37,950 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:26:37,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:26:38,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:26:38,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:26:38,009 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:26:38,010 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:26:38,011 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum02.i_3.bpl [2018-09-26 21:26:38,011 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum02.i_3.bpl' [2018-09-26 21:26:38,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:26:38,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:26:38,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:26:38,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:26:38,068 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:26:38,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... [2018-09-26 21:26:38,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... [2018-09-26 21:26:38,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:26:38,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:26:38,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:26:38,112 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:26:38,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... [2018-09-26 21:26:38,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... [2018-09-26 21:26:38,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... [2018-09-26 21:26:38,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... [2018-09-26 21:26:38,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... [2018-09-26 21:26:38,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... [2018-09-26 21:26:38,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... [2018-09-26 21:26:38,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:26:38,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:26:38,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:26:38,136 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:26:38,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:26:38,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:26:38,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:26:38,425 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:26:38,426 INFO L202 PluginConnector]: Adding new model sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:26:38 BoogieIcfgContainer [2018-09-26 21:26:38,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:26:38,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:26:38,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:26:38,430 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:26:38,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:26:38" (1/2) ... [2018-09-26 21:26:38,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ff08df and model type sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:26:38, skipping insertion in model container [2018-09-26 21:26:38,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:26:38" (2/2) ... [2018-09-26 21:26:38,434 INFO L112 eAbstractionObserver]: Analyzing ICFG sum02.i_3.bpl [2018-09-26 21:26:38,444 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:26:38,451 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:26:38,502 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:26:38,503 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:26:38,503 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:26:38,503 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:26:38,503 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:26:38,503 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:26:38,504 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:26:38,504 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:26:38,504 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:26:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:26:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:26:38,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:38,526 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:26:38,527 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:38,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:38,534 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 21:26:38,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:38,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:38,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:38,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:38,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:38,616 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:26:38,617 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:26:38,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:26:38,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:38,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:38,711 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 21:26:38,734 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:26:38,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:26:38,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:26:38,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:26:38,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:26:38,754 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:26:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:38,855 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-26 21:26:38,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:26:38,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:26:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:38,869 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:26:38,869 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:26:38,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:26:38,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:26:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:26:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:26:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:26:38,920 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 21:26:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:38,920 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:26:38,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:26:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:26:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:26:38,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:38,921 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 21:26:38,922 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:38,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-26 21:26:38,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:38,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:38,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:38,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:38,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:38,931 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:26:38,931 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:26:38,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:26:38,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:26:38,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:39,100 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 21:26:39,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:26:39,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-26 21:26:39,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:26:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:26:39,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:26:39,126 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-26 21:26:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:39,176 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:26:39,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:26:39,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:26:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:39,178 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:26:39,178 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:26:39,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:26:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:26:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:26:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:26:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:26:39,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 21:26:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:39,183 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:26:39,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:26:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:26:39,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:26:39,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:39,184 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 21:26:39,184 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:39,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-26 21:26:39,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:39,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:39,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:39,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:26:39,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:39,196 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:26:39,196 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:26:39,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:26:39,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:26:39,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:26:39,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:26:39,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:26:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:26:39,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:26:39,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-26 21:26:39,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:26:39,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:26:39,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:26:39,501 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-26 21:26:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:26:39,613 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:26:39,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:26:39,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:26:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:26:39,615 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:26:39,615 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:26:39,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:26:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:26:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:26:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:26:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:26:39,620 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 21:26:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:26:39,620 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:26:39,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:26:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:26:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:26:39,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:26:39,622 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 21:26:39,622 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:26:39,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:26:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-26 21:26:39,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:26:39,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:26:39,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:39,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:26:39,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:26:39,649 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:26:39,649 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:26:39,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:26:39,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:21,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:28:21,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:21,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:21,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:28:21,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-26 21:28:21,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:28:21,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:28:21,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:28:21,436 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-26 21:28:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:21,497 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:28:21,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:28:21,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:28:21,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:21,499 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:28:21,500 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:28:21,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:28:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:28:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:28:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:28:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:28:21,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-26 21:28:21,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:21,507 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:28:21,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:28:21,508 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:28:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:28:21,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:21,508 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-26 21:28:21,509 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:21,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:21,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-26 21:28:21,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:21,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:21,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:21,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:21,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:21,534 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:28:21,534 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:28:21,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:28:21,551 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:22,044 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:22,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:22,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:22,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:28:22,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-26 21:28:22,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:28:22,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:28:22,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:28:22,405 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-26 21:28:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:22,518 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:28:22,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:28:22,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-26 21:28:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:22,522 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:28:22,522 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:28:22,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:28:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:28:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:28:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:28:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:28:22,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-26 21:28:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:22,527 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:28:22,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:28:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:28:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:28:22,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:22,528 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-26 21:28:22,529 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:22,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:22,529 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-26 21:28:22,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:22,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:22,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:22,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:22,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:22,548 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:28:22,548 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:28:22,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:28:22,561 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:37,346 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:28:37,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:37,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:37,713 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-09-26 21:28:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:37,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:28:37,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-26 21:28:37,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:28:37,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:28:37,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:28:37,904 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-26 21:28:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:38,065 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:28:38,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:28:38,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:28:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:38,067 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:28:38,067 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:28:38,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:28:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:28:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:28:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:28:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:28:38,072 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-26 21:28:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:38,072 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:28:38,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:28:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:28:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:28:38,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:38,074 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-26 21:28:38,074 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:38,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-26 21:28:38,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:38,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:38,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:38,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:38,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:38,088 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:28:38,088 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:28:38,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:28:38,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:42,263 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:28:42,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:42,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:43,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:28:43,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-26 21:28:43,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:28:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:28:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:28:43,170 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-26 21:28:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:43,260 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:28:43,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:28:43,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:28:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:43,262 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:28:43,262 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:28:43,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:28:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:28:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:28:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:28:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:28:43,267 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-26 21:28:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:43,267 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:28:43,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:28:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:28:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:28:43,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:43,268 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-26 21:28:43,269 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:43,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-26 21:28:43,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:43,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:43,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:43,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:43,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:43,283 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:28:43,284 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:28:43,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:28:43,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:43,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:44,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:28:44,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-26 21:28:44,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:28:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:28:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:28:44,215 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-26 21:28:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:44,747 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:28:44,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:28:44,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:28:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:44,748 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:28:44,748 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:28:44,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:28:44,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:28:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:28:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:28:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:28:44,754 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-26 21:28:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:44,755 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:28:44,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:28:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:28:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:28:44,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:44,756 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-26 21:28:44,756 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:44,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-26 21:28:44,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:44,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:44,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:44,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:44,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:44,771 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:28:44,771 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:28:44,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:28:44,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:07,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:07,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:07,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:07,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:29:07,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-26 21:29:07,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:29:07,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:29:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:29:07,559 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-26 21:29:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:07,877 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:29:07,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:29:07,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-26 21:29:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:07,881 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:29:07,881 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:29:07,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:29:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:29:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:29:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:29:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:29:07,887 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-26 21:29:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:07,888 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:29:07,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:29:07,888 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:29:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:29:07,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:07,889 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-26 21:29:07,889 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:07,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-26 21:29:07,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:07,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:07,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:07,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:07,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:07,908 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-26 21:29:07,908 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-26 21:29:07,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-26 21:29:07,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown