java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/down_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 23:38:39,918 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 23:38:39,920 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 23:38:39,933 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 23:38:39,933 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 23:38:39,934 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 23:38:39,936 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 23:38:39,938 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 23:38:39,940 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 23:38:39,940 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 23:38:39,943 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-07-23 23:38:39,988 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-23 23:38:40,011 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 23:38:40,012 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 23:38:40,013 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 23:38:40,013 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-23 23:38:40,014 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-23 23:38:40,014 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-23 23:38:40,014 INFO L133 SettingsManager]: * Use SBE=true [2018-07-23 23:38:40,014 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 23:38:40,015 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 23:38:40,015 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 23:38:40,015 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 23:38:40,016 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 23:38:40,017 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 23:38:40,017 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 23:38:40,017 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 23:38:40,017 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 23:38:40,017 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 23:38:40,018 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 23:38:40,018 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 23:38:40,018 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:38:40,018 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 23:38:40,020 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 23:38:40,020 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 23:38:40,020 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-23 23:38:40,020 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 23:38:40,020 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 23:38:40,021 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 23:38:40,021 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 23:38:40,071 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 23:38:40,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 23:38:40,094 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 23:38:40,096 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 23:38:40,096 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 23:38:40,097 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/down_true-unreach-call_true-termination.i [2018-07-23 23:38:40,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89e4f068/df4d0f428255405d8893904cb2b7ec7a/FLAG663971920 [2018-07-23 23:38:40,594 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 23:38:40,595 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/down_true-unreach-call_true-termination.i [2018-07-23 23:38:40,600 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89e4f068/df4d0f428255405d8893904cb2b7ec7a/FLAG663971920 [2018-07-23 23:38:40,614 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89e4f068/df4d0f428255405d8893904cb2b7ec7a [2018-07-23 23:38:40,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 23:38:40,625 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 23:38:40,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 23:38:40,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 23:38:40,633 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 23:38:40,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8e2e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40, skipping insertion in model container [2018-07-23 23:38:40,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,826 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 23:38:40,864 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:38:40,880 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 23:38:40,885 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:38:40,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40 WrapperNode [2018-07-23 23:38:40,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 23:38:40,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 23:38:40,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 23:38:40,899 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 23:38:40,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 23:38:40,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 23:38:40,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 23:38:40,934 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 23:38:40,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (1/1) ... [2018-07-23 23:38:40,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 23:38:40,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 23:38:40,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 23:38:40,956 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 23:38:40,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (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 [2018-07-23 23:38:41,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 23:38:41,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 23:38:41,398 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 23:38:41,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:38:41 BoogieIcfgContainer [2018-07-23 23:38:41,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 23:38:41,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 23:38:41,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 23:38:41,403 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 23:38:41,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 11:38:40" (1/3) ... [2018-07-23 23:38:41,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cbbe3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:38:41, skipping insertion in model container [2018-07-23 23:38:41,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:38:40" (2/3) ... [2018-07-23 23:38:41,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cbbe3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:38:41, skipping insertion in model container [2018-07-23 23:38:41,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:38:41" (3/3) ... [2018-07-23 23:38:41,406 INFO L112 eAbstractionObserver]: Analyzing ICFG down_true-unreach-call_true-termination.i [2018-07-23 23:38:41,415 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 23:38:41,423 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 23:38:41,466 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 23:38:41,466 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 23:38:41,467 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 23:38:41,467 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 23:38:41,467 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 23:38:41,467 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 23:38:41,467 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 23:38:41,467 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 23:38:41,467 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 23:38:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-07-23 23:38:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 23:38:41,489 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:41,491 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:41,491 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:41,496 INFO L82 PathProgramCache]: Analyzing trace with hash 383759085, now seen corresponding path program 1 times [2018-07-23 23:38:41,499 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:41,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:41,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:41,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:41,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:41,608 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:38:41,608 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 23:38:41,613 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-23 23:38:41,628 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-23 23:38:41,629 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:38:41,631 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2018-07-23 23:38:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:41,647 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-07-23 23:38:41,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-23 23:38:41,649 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-07-23 23:38:41,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:41,658 INFO L225 Difference]: With dead ends: 26 [2018-07-23 23:38:41,658 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 23:38:41,661 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:38:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 23:38:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 23:38:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 23:38:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-07-23 23:38:41,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-07-23 23:38:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:41,697 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-07-23 23:38:41,697 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-23 23:38:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-07-23 23:38:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 23:38:41,698 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:41,698 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:41,698 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:41,698 INFO L82 PathProgramCache]: Analyzing trace with hash 325884241, now seen corresponding path program 1 times [2018-07-23 23:38:41,699 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:41,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:41,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:41,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:41,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:41,894 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:38:41,894 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-23 23:38:41,896 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:38:41,896 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:38:41,896 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:38:41,897 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2018-07-23 23:38:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:42,066 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-07-23 23:38:42,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 23:38:42,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-07-23 23:38:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:42,067 INFO L225 Difference]: With dead ends: 22 [2018-07-23 23:38:42,068 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 23:38:42,069 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:38:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 23:38:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 23:38:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 23:38:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-07-23 23:38:42,073 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-07-23 23:38:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:42,074 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-07-23 23:38:42,074 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:38:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-07-23 23:38:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 23:38:42,075 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:42,075 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:42,075 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1748104565, now seen corresponding path program 1 times [2018-07-23 23:38:42,076 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:42,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:42,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:42,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:42,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:42,187 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:38:42,187 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-23 23:38:42,187 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:38:42,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:38:42,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:38:42,188 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-07-23 23:38:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:42,304 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-07-23 23:38:42,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 23:38:42,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-07-23 23:38:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:42,306 INFO L225 Difference]: With dead ends: 25 [2018-07-23 23:38:42,306 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 23:38:42,307 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:38:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 23:38:42,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-07-23 23:38:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 23:38:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-07-23 23:38:42,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-07-23 23:38:42,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:42,314 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-07-23 23:38:42,314 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:38:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-07-23 23:38:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 23:38:42,315 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:42,315 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:42,315 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:42,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1639575084, now seen corresponding path program 1 times [2018-07-23 23:38:42,316 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:42,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:42,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:42,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:42,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:42,546 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:42,546 INFO L221 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 [2018-07-23 23:38:42,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:42,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:42,644 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:42,644 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-23 23:38:42,644 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 23:38:42,645 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 23:38:42,645 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:38:42,645 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2018-07-23 23:38:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:42,874 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-07-23 23:38:42,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 23:38:42,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-07-23 23:38:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:42,876 INFO L225 Difference]: With dead ends: 31 [2018-07-23 23:38:42,876 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 23:38:42,877 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:38:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 23:38:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-23 23:38:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 23:38:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-07-23 23:38:42,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-07-23 23:38:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:42,882 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-07-23 23:38:42,882 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 23:38:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-07-23 23:38:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 23:38:42,883 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:42,883 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:42,883 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash 842542990, now seen corresponding path program 2 times [2018-07-23 23:38:42,884 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:42,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:42,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:42,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:42,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:43,129 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:43,129 INFO L221 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 [2018-07-23 23:38:43,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:38:43,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:38:43,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:43,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:43,206 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:43,207 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-07-23 23:38:43,207 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 23:38:43,207 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 23:38:43,208 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:38:43,208 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-07-23 23:38:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:43,406 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-07-23 23:38:43,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 23:38:43,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-07-23 23:38:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:43,408 INFO L225 Difference]: With dead ends: 31 [2018-07-23 23:38:43,409 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 23:38:43,410 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:38:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 23:38:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-07-23 23:38:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 23:38:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-07-23 23:38:43,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-07-23 23:38:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:43,417 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-07-23 23:38:43,417 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 23:38:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-07-23 23:38:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 23:38:43,418 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:43,418 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:43,418 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash -46138025, now seen corresponding path program 3 times [2018-07-23 23:38:43,419 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:43,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:43,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:43,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:43,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:43,854 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:43,854 INFO L221 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 [2018-07-23 23:38:43,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:38:43,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-07-23 23:38:43,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:43,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:43,937 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:43,938 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-23 23:38:43,938 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:38:43,938 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:38:43,939 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:38:43,939 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2018-07-23 23:38:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:44,097 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-07-23 23:38:44,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 23:38:44,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-07-23 23:38:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:44,099 INFO L225 Difference]: With dead ends: 41 [2018-07-23 23:38:44,099 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 23:38:44,100 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:38:44,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 23:38:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-23 23:38:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-23 23:38:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-07-23 23:38:44,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2018-07-23 23:38:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:44,105 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-07-23 23:38:44,105 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:38:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-07-23 23:38:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 23:38:44,106 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:44,106 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:44,107 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:44,107 INFO L82 PathProgramCache]: Analyzing trace with hash -676370543, now seen corresponding path program 4 times [2018-07-23 23:38:44,107 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:44,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:44,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:44,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:44,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:44,237 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:44,238 INFO L221 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 [2018-07-23 23:38:44,252 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:38:44,276 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:38:44,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:44,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:44,324 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:44,324 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-07-23 23:38:44,325 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:38:44,325 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:38:44,325 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:38:44,326 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2018-07-23 23:38:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:44,493 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-07-23 23:38:44,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 23:38:44,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-07-23 23:38:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:44,496 INFO L225 Difference]: With dead ends: 37 [2018-07-23 23:38:44,496 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 23:38:44,497 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:38:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 23:38:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-07-23 23:38:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-23 23:38:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-07-23 23:38:44,503 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-07-23 23:38:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:44,504 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-07-23 23:38:44,504 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:38:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-07-23 23:38:44,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 23:38:44,505 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:44,505 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:44,505 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash 612727770, now seen corresponding path program 5 times [2018-07-23 23:38:44,506 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:44,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:44,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:44,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:44,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:44,858 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:44,858 INFO L221 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 [2018-07-23 23:38:44,868 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:38:44,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-07-23 23:38:44,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:44,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:44,948 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:44,948 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-23 23:38:44,948 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 23:38:44,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 23:38:44,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:38:44,949 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 11 states. [2018-07-23 23:38:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:45,122 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-07-23 23:38:45,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 23:38:45,122 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-07-23 23:38:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:45,123 INFO L225 Difference]: With dead ends: 51 [2018-07-23 23:38:45,123 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 23:38:45,124 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:38:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 23:38:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-07-23 23:38:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-23 23:38:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-07-23 23:38:45,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2018-07-23 23:38:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:45,129 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-07-23 23:38:45,130 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 23:38:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-07-23 23:38:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-23 23:38:45,131 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:45,131 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:45,131 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2140745068, now seen corresponding path program 6 times [2018-07-23 23:38:45,131 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:45,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:45,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:45,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:45,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:45,279 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:45,279 INFO L221 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 [2018-07-23 23:38:45,287 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:38:45,306 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-07-23 23:38:45,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:45,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:45,380 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:45,381 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-07-23 23:38:45,381 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 23:38:45,381 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 23:38:45,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:38:45,382 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-07-23 23:38:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:45,567 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-07-23 23:38:45,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 23:38:45,568 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-07-23 23:38:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:45,569 INFO L225 Difference]: With dead ends: 43 [2018-07-23 23:38:45,569 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 23:38:45,570 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:38:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 23:38:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2018-07-23 23:38:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-23 23:38:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-07-23 23:38:45,576 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2018-07-23 23:38:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:45,576 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-07-23 23:38:45,576 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 23:38:45,576 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-07-23 23:38:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-23 23:38:45,577 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:45,578 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:45,578 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2109320541, now seen corresponding path program 7 times [2018-07-23 23:38:45,578 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:45,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:45,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:45,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:45,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:45,728 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:45,728 INFO L221 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 [2018-07-23 23:38:45,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:45,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:45,791 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:45,791 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-07-23 23:38:45,792 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 23:38:45,792 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 23:38:45,794 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:38:45,794 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2018-07-23 23:38:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:46,231 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-07-23 23:38:46,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 23:38:46,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2018-07-23 23:38:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:46,233 INFO L225 Difference]: With dead ends: 61 [2018-07-23 23:38:46,233 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 23:38:46,234 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:38:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 23:38:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-23 23:38:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-23 23:38:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-07-23 23:38:46,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-07-23 23:38:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:46,241 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-07-23 23:38:46,241 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 23:38:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-07-23 23:38:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-23 23:38:46,242 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:46,242 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:46,242 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:46,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1946783895, now seen corresponding path program 8 times [2018-07-23 23:38:46,243 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:46,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:46,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:46,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:46,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:46,429 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:46,430 INFO L221 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 [2018-07-23 23:38:46,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:38:46,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:38:46,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:46,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:46,513 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:46,514 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-07-23 23:38:46,514 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 23:38:46,514 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 23:38:46,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:38:46,515 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2018-07-23 23:38:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:46,741 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-07-23 23:38:46,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 23:38:46,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-07-23 23:38:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:46,742 INFO L225 Difference]: With dead ends: 49 [2018-07-23 23:38:46,743 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 23:38:46,743 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:38:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 23:38:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2018-07-23 23:38:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-23 23:38:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-07-23 23:38:46,750 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-07-23 23:38:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:46,751 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-07-23 23:38:46,751 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 23:38:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-07-23 23:38:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-23 23:38:46,752 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:46,752 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:46,752 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1173860832, now seen corresponding path program 9 times [2018-07-23 23:38:46,753 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:46,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:46,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:46,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:46,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:46,921 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:46,921 INFO L221 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 [2018-07-23 23:38:46,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:38:47,031 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-23 23:38:47,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:47,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:47,080 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:47,081 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-23 23:38:47,081 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 23:38:47,082 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 23:38:47,082 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:38:47,082 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2018-07-23 23:38:47,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:47,361 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-07-23 23:38:47,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 23:38:47,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-07-23 23:38:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:47,363 INFO L225 Difference]: With dead ends: 71 [2018-07-23 23:38:47,363 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 23:38:47,364 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:38:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 23:38:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-07-23 23:38:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-23 23:38:47,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-07-23 23:38:47,369 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-07-23 23:38:47,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:47,369 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-07-23 23:38:47,369 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 23:38:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-07-23 23:38:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-23 23:38:47,370 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:47,370 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:47,370 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:47,370 INFO L82 PathProgramCache]: Analyzing trace with hash 666550682, now seen corresponding path program 10 times [2018-07-23 23:38:47,371 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:47,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:47,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:47,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:47,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:47,519 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:47,519 INFO L221 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 [2018-07-23 23:38:47,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:38:47,574 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:38:47,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:47,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:47,702 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:47,702 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-07-23 23:38:47,703 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 23:38:47,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 23:38:47,703 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:38:47,703 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2018-07-23 23:38:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:48,199 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-07-23 23:38:48,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 23:38:48,200 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-07-23 23:38:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:48,201 INFO L225 Difference]: With dead ends: 55 [2018-07-23 23:38:48,201 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 23:38:48,202 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:38:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 23:38:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2018-07-23 23:38:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 23:38:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-07-23 23:38:48,210 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2018-07-23 23:38:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:48,211 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-07-23 23:38:48,211 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 23:38:48,211 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-07-23 23:38:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-23 23:38:48,212 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:48,212 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:48,212 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:48,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1808968035, now seen corresponding path program 11 times [2018-07-23 23:38:48,212 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:48,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:48,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:48,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:48,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:48,408 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:48,408 INFO L221 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 [2018-07-23 23:38:48,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:38:48,466 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-07-23 23:38:48,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:48,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:48,507 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:48,507 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-23 23:38:48,507 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:38:48,508 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:38:48,508 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:38:48,508 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 17 states. [2018-07-23 23:38:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:49,019 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-07-23 23:38:49,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 23:38:49,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-07-23 23:38:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:49,021 INFO L225 Difference]: With dead ends: 81 [2018-07-23 23:38:49,021 INFO L226 Difference]: Without dead ends: 48 [2018-07-23 23:38:49,022 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:38:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-23 23:38:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-07-23 23:38:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-23 23:38:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-07-23 23:38:49,029 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2018-07-23 23:38:49,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:49,030 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-07-23 23:38:49,030 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:38:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-07-23 23:38:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-23 23:38:49,031 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:49,031 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:49,031 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1676311139, now seen corresponding path program 12 times [2018-07-23 23:38:49,032 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:49,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:49,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:49,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:49,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:49,281 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:49,281 INFO L221 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 [2018-07-23 23:38:49,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:38:49,328 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-07-23 23:38:49,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:49,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:49,403 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:49,403 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-07-23 23:38:49,404 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 23:38:49,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 23:38:49,404 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:38:49,404 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2018-07-23 23:38:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:49,625 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-07-23 23:38:49,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 23:38:49,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-07-23 23:38:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:49,627 INFO L225 Difference]: With dead ends: 61 [2018-07-23 23:38:49,627 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 23:38:49,628 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:38:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 23:38:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2018-07-23 23:38:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-23 23:38:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-07-23 23:38:49,636 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2018-07-23 23:38:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:49,637 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-07-23 23:38:49,637 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 23:38:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-07-23 23:38:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-23 23:38:49,638 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:49,638 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:49,638 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash -313150490, now seen corresponding path program 13 times [2018-07-23 23:38:49,639 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:49,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:49,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:49,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:49,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:49,912 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:49,912 INFO L221 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 [2018-07-23 23:38:49,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:49,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:49,997 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:49,997 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-07-23 23:38:49,997 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 23:38:49,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 23:38:49,998 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:38:49,998 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 19 states. [2018-07-23 23:38:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:50,337 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-07-23 23:38:50,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 23:38:50,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2018-07-23 23:38:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:50,338 INFO L225 Difference]: With dead ends: 91 [2018-07-23 23:38:50,338 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 23:38:50,339 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:38:50,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 23:38:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-07-23 23:38:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-23 23:38:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-07-23 23:38:50,347 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2018-07-23 23:38:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:50,347 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-07-23 23:38:50,347 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 23:38:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-07-23 23:38:50,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-23 23:38:50,348 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:50,348 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:50,348 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash 992804000, now seen corresponding path program 14 times [2018-07-23 23:38:50,349 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:50,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:50,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:50,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:50,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:50,567 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:50,567 INFO L221 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 [2018-07-23 23:38:50,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:38:50,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:38:50,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:50,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:50,699 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:50,699 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-07-23 23:38:50,700 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 23:38:50,700 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 23:38:50,700 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:38:50,700 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 14 states. [2018-07-23 23:38:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:51,088 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-07-23 23:38:51,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 23:38:51,089 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-07-23 23:38:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:51,090 INFO L225 Difference]: With dead ends: 67 [2018-07-23 23:38:51,090 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 23:38:51,092 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:38:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 23:38:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2018-07-23 23:38:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-23 23:38:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-07-23 23:38:51,108 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2018-07-23 23:38:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:51,109 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-07-23 23:38:51,109 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 23:38:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-07-23 23:38:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-23 23:38:51,110 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:51,110 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:51,112 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1241255575, now seen corresponding path program 15 times [2018-07-23 23:38:51,112 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:51,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:51,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:51,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:51,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:51,372 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:51,372 INFO L221 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 [2018-07-23 23:38:51,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:38:51,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-07-23 23:38:51,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:51,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:51,448 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:51,448 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-23 23:38:51,448 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 23:38:51,448 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 23:38:51,449 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:38:51,449 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 21 states. [2018-07-23 23:38:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:51,947 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-07-23 23:38:51,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 23:38:51,947 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2018-07-23 23:38:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:51,948 INFO L225 Difference]: With dead ends: 101 [2018-07-23 23:38:51,948 INFO L226 Difference]: Without dead ends: 60 [2018-07-23 23:38:51,949 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:38:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-23 23:38:51,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-07-23 23:38:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-23 23:38:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-07-23 23:38:51,957 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2018-07-23 23:38:51,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:51,957 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-07-23 23:38:51,957 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 23:38:51,957 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-07-23 23:38:51,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-23 23:38:51,958 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:51,958 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:51,958 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:51,958 INFO L82 PathProgramCache]: Analyzing trace with hash 915162787, now seen corresponding path program 16 times [2018-07-23 23:38:51,958 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:51,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:51,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:51,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:51,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:52,133 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:52,133 INFO L221 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 [2018-07-23 23:38:52,140 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:38:52,168 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:38:52,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:52,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:52,250 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:52,250 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-07-23 23:38:52,250 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 23:38:52,250 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 23:38:52,250 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:38:52,251 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2018-07-23 23:38:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:52,464 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-07-23 23:38:52,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 23:38:52,464 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2018-07-23 23:38:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:52,465 INFO L225 Difference]: With dead ends: 73 [2018-07-23 23:38:52,465 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 23:38:52,466 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:38:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 23:38:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-07-23 23:38:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-23 23:38:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-07-23 23:38:52,473 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2018-07-23 23:38:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:52,474 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-07-23 23:38:52,474 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 23:38:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-07-23 23:38:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-23 23:38:52,475 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:52,475 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:52,475 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:52,475 INFO L82 PathProgramCache]: Analyzing trace with hash -52919828, now seen corresponding path program 17 times [2018-07-23 23:38:52,475 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:52,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:52,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:52,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:52,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:52,831 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:52,831 INFO L221 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 [2018-07-23 23:38:52,839 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:38:52,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-07-23 23:38:52,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:52,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:52,913 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:52,913 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-23 23:38:52,913 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 23:38:52,913 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 23:38:52,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:38:52,914 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 23 states. [2018-07-23 23:38:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:53,470 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-07-23 23:38:53,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 23:38:53,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2018-07-23 23:38:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:53,471 INFO L225 Difference]: With dead ends: 111 [2018-07-23 23:38:53,471 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 23:38:53,472 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:38:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 23:38:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-07-23 23:38:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-23 23:38:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-07-23 23:38:53,480 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2018-07-23 23:38:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:53,480 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-07-23 23:38:53,480 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 23:38:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-07-23 23:38:53,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-23 23:38:53,481 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:53,481 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:53,481 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1698071462, now seen corresponding path program 18 times [2018-07-23 23:38:53,481 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:53,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:53,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:53,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:53,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:54,269 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:54,269 INFO L221 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 [2018-07-23 23:38:54,287 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:38:54,327 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-07-23 23:38:54,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:54,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:54,440 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:54,441 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-07-23 23:38:54,441 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 23:38:54,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 23:38:54,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:38:54,441 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 16 states. [2018-07-23 23:38:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:55,099 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-07-23 23:38:55,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 23:38:55,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-07-23 23:38:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:55,100 INFO L225 Difference]: With dead ends: 79 [2018-07-23 23:38:55,101 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 23:38:55,101 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:38:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 23:38:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2018-07-23 23:38:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-23 23:38:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-07-23 23:38:55,109 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2018-07-23 23:38:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:55,109 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-07-23 23:38:55,109 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 23:38:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-07-23 23:38:55,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-23 23:38:55,110 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:55,110 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:55,110 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:55,110 INFO L82 PathProgramCache]: Analyzing trace with hash 575047023, now seen corresponding path program 19 times [2018-07-23 23:38:55,110 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:55,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:55,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:55,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:55,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:55,433 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:55,433 INFO L221 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 [2018-07-23 23:38:55,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:55,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:55,505 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:55,505 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-07-23 23:38:55,505 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 23:38:55,506 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 23:38:55,506 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:38:55,506 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 25 states. [2018-07-23 23:38:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:55,800 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2018-07-23 23:38:55,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 23:38:55,801 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2018-07-23 23:38:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:55,802 INFO L225 Difference]: With dead ends: 121 [2018-07-23 23:38:55,802 INFO L226 Difference]: Without dead ends: 72 [2018-07-23 23:38:55,803 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=995, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:38:55,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-23 23:38:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-07-23 23:38:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-23 23:38:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-07-23 23:38:55,812 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2018-07-23 23:38:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:55,813 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-07-23 23:38:55,813 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 23:38:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-07-23 23:38:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-23 23:38:55,813 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:55,813 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:55,814 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1582902359, now seen corresponding path program 20 times [2018-07-23 23:38:55,814 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:55,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:55,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:55,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:38:55,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:56,343 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:56,343 INFO L221 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 [2018-07-23 23:38:56,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:38:56,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:38:56,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:56,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:56,540 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:56,540 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-07-23 23:38:56,541 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:38:56,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:38:56,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:38:56,541 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2018-07-23 23:38:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:56,831 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-07-23 23:38:56,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 23:38:56,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-07-23 23:38:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:56,832 INFO L225 Difference]: With dead ends: 85 [2018-07-23 23:38:56,833 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 23:38:56,833 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:38:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 23:38:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2018-07-23 23:38:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-23 23:38:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-07-23 23:38:56,845 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2018-07-23 23:38:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:56,845 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-07-23 23:38:56,845 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:38:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-07-23 23:38:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-23 23:38:56,846 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:56,846 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:56,846 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:56,847 INFO L82 PathProgramCache]: Analyzing trace with hash 238623730, now seen corresponding path program 21 times [2018-07-23 23:38:56,847 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:56,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:56,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:56,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:56,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:57,353 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:57,353 INFO L221 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 [2018-07-23 23:38:57,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:38:57,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-07-23 23:38:57,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:57,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:57,494 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:57,494 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-07-23 23:38:57,495 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 23:38:57,495 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 23:38:57,495 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:38:57,495 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 27 states. [2018-07-23 23:38:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:57,843 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-07-23 23:38:57,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 23:38:57,843 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 75 [2018-07-23 23:38:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:57,844 INFO L225 Difference]: With dead ends: 131 [2018-07-23 23:38:57,844 INFO L226 Difference]: Without dead ends: 78 [2018-07-23 23:38:57,845 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:38:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-23 23:38:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-07-23 23:38:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-23 23:38:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-07-23 23:38:57,854 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2018-07-23 23:38:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:57,854 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-07-23 23:38:57,854 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 23:38:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-07-23 23:38:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 23:38:57,855 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:57,855 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:57,855 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:57,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1479518548, now seen corresponding path program 22 times [2018-07-23 23:38:57,855 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:57,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:57,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:57,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:57,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:58,104 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:58,105 INFO L221 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 [2018-07-23 23:38:58,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:38:58,148 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:38:58,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:58,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:58,213 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:58,213 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-07-23 23:38:58,213 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 23:38:58,213 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 23:38:58,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:38:58,214 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 18 states. [2018-07-23 23:38:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:38:58,529 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-07-23 23:38:58,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 23:38:58,529 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2018-07-23 23:38:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:38:58,530 INFO L225 Difference]: With dead ends: 91 [2018-07-23 23:38:58,530 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 23:38:58,531 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:38:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 23:38:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2018-07-23 23:38:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-23 23:38:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-07-23 23:38:58,541 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2018-07-23 23:38:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:38:58,541 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-07-23 23:38:58,541 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 23:38:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-07-23 23:38:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-23 23:38:58,542 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:38:58,542 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-23 23:38:58,542 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:38:58,543 INFO L82 PathProgramCache]: Analyzing trace with hash 236152181, now seen corresponding path program 23 times [2018-07-23 23:38:58,543 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:38:58,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:38:58,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:58,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:38:58,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:38:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:38:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:59,723 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:38:59,723 INFO L221 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 [2018-07-23 23:38:59,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:38:59,773 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-07-23 23:38:59,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:38:59,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:38:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:38:59,807 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:38:59,808 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-07-23 23:38:59,808 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:38:59,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:38:59,808 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:38:59,809 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 29 states. [2018-07-23 23:39:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:00,556 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-07-23 23:39:00,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:39:00,557 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2018-07-23 23:39:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:00,558 INFO L225 Difference]: With dead ends: 141 [2018-07-23 23:39:00,558 INFO L226 Difference]: Without dead ends: 84 [2018-07-23 23:39:00,559 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:39:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-23 23:39:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-07-23 23:39:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-23 23:39:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-07-23 23:39:00,568 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2018-07-23 23:39:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:00,568 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-07-23 23:39:00,568 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:39:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-07-23 23:39:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-23 23:39:00,569 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:00,569 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:00,569 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1931357359, now seen corresponding path program 24 times [2018-07-23 23:39:00,569 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:00,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:00,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:00,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:00,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:00,869 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:00,870 INFO L221 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 [2018-07-23 23:39:00,879 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:39:00,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-07-23 23:39:00,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:00,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:00,988 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:00,988 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-07-23 23:39:00,989 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 23:39:00,989 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 23:39:00,989 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:39:00,989 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 19 states. [2018-07-23 23:39:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:01,281 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-07-23 23:39:01,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 23:39:01,282 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-07-23 23:39:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:01,282 INFO L225 Difference]: With dead ends: 97 [2018-07-23 23:39:01,282 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 23:39:01,283 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:39:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 23:39:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2018-07-23 23:39:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-23 23:39:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-07-23 23:39:01,295 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2018-07-23 23:39:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:01,295 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-07-23 23:39:01,295 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 23:39:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-07-23 23:39:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-23 23:39:01,295 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:01,296 INFO L353 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:01,296 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash 850428408, now seen corresponding path program 25 times [2018-07-23 23:39:01,296 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:01,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:01,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:01,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:01,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:02,081 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:02,081 INFO L221 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 [2018-07-23 23:39:02,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:02,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:02,161 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:02,161 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-07-23 23:39:02,161 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 23:39:02,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 23:39:02,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:39:02,162 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 31 states. [2018-07-23 23:39:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:02,893 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-07-23 23:39:02,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 23:39:02,893 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 87 [2018-07-23 23:39:02,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:02,894 INFO L225 Difference]: With dead ends: 151 [2018-07-23 23:39:02,894 INFO L226 Difference]: Without dead ends: 90 [2018-07-23 23:39:02,895 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=511, Invalid=1559, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:39:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-23 23:39:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-07-23 23:39:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-23 23:39:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-07-23 23:39:02,905 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2018-07-23 23:39:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:02,905 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-07-23 23:39:02,905 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 23:39:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-07-23 23:39:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-23 23:39:02,905 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:02,906 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:02,906 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:02,906 INFO L82 PathProgramCache]: Analyzing trace with hash 477328818, now seen corresponding path program 26 times [2018-07-23 23:39:02,906 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:02,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:02,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:02,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:02,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:03,296 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:03,297 INFO L221 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 [2018-07-23 23:39:03,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:03,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:03,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:03,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:03,431 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:03,432 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-07-23 23:39:03,432 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 23:39:03,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 23:39:03,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:39:03,433 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 20 states. [2018-07-23 23:39:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:03,805 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-07-23 23:39:03,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 23:39:03,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2018-07-23 23:39:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:03,807 INFO L225 Difference]: With dead ends: 103 [2018-07-23 23:39:03,807 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 23:39:03,808 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=797, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:39:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 23:39:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2018-07-23 23:39:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-23 23:39:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-07-23 23:39:03,822 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2018-07-23 23:39:03,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:03,822 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-07-23 23:39:03,822 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 23:39:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-07-23 23:39:03,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-23 23:39:03,823 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:03,823 INFO L353 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:03,823 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash 778277243, now seen corresponding path program 27 times [2018-07-23 23:39:03,823 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:03,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:03,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:03,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:03,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:04,635 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:04,635 INFO L221 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 [2018-07-23 23:39:04,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:04,699 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-07-23 23:39:04,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:04,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:04,748 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:04,748 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-07-23 23:39:04,749 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:39:04,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:39:04,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:39:04,749 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 33 states. [2018-07-23 23:39:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:05,489 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-07-23 23:39:05,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 23:39:05,489 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2018-07-23 23:39:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:05,490 INFO L225 Difference]: With dead ends: 161 [2018-07-23 23:39:05,490 INFO L226 Difference]: Without dead ends: 96 [2018-07-23 23:39:05,491 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=1775, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:39:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-23 23:39:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-07-23 23:39:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-23 23:39:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-07-23 23:39:05,506 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2018-07-23 23:39:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:05,506 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-07-23 23:39:05,506 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:39:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-07-23 23:39:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-23 23:39:05,506 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:05,507 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:05,507 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash 942363061, now seen corresponding path program 28 times [2018-07-23 23:39:05,507 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:05,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:05,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:05,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:05,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:06,034 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:06,034 INFO L221 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 [2018-07-23 23:39:06,041 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:06,081 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:06,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:06,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:06,144 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:06,144 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-07-23 23:39:06,144 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 23:39:06,144 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 23:39:06,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:39:06,145 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2018-07-23 23:39:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:06,515 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-07-23 23:39:06,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 23:39:06,516 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2018-07-23 23:39:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:06,517 INFO L225 Difference]: With dead ends: 109 [2018-07-23 23:39:06,517 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 23:39:06,518 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=517, Invalid=889, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:39:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 23:39:06,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-07-23 23:39:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-23 23:39:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-07-23 23:39:06,536 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2018-07-23 23:39:06,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:06,536 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-07-23 23:39:06,536 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 23:39:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-07-23 23:39:06,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-23 23:39:06,537 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:06,537 INFO L353 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:06,537 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:06,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1292389378, now seen corresponding path program 29 times [2018-07-23 23:39:06,537 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:06,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:06,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:06,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:06,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:06,985 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:06,985 INFO L221 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 [2018-07-23 23:39:06,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:07,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-07-23 23:39:07,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:07,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:07,234 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:07,234 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-07-23 23:39:07,234 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 23:39:07,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 23:39:07,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:39:07,235 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 35 states. [2018-07-23 23:39:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:07,881 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-07-23 23:39:07,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 23:39:07,881 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2018-07-23 23:39:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:07,882 INFO L225 Difference]: With dead ends: 171 [2018-07-23 23:39:07,883 INFO L226 Difference]: Without dead ends: 102 [2018-07-23 23:39:07,884 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=647, Invalid=2005, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:39:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-23 23:39:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-07-23 23:39:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-23 23:39:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-07-23 23:39:07,896 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-07-23 23:39:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:07,897 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-07-23 23:39:07,897 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 23:39:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-07-23 23:39:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-23 23:39:07,898 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:07,898 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:07,898 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:07,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1273438024, now seen corresponding path program 30 times [2018-07-23 23:39:07,898 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:07,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:07,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:07,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:07,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:08,189 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:08,189 INFO L221 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 [2018-07-23 23:39:08,199 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:39:08,254 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-07-23 23:39:08,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:08,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:08,398 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:08,398 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-07-23 23:39:08,399 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 23:39:08,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 23:39:08,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:39:08,399 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2018-07-23 23:39:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:08,740 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-07-23 23:39:08,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 23:39:08,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2018-07-23 23:39:08,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:08,742 INFO L225 Difference]: With dead ends: 115 [2018-07-23 23:39:08,742 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 23:39:08,743 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=986, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:39:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 23:39:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2018-07-23 23:39:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-23 23:39:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-07-23 23:39:08,757 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2018-07-23 23:39:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:08,758 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-07-23 23:39:08,758 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 23:39:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-07-23 23:39:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-23 23:39:08,758 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:08,758 INFO L353 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:08,758 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:08,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1336936833, now seen corresponding path program 31 times [2018-07-23 23:39:08,759 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:08,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:08,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:08,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:08,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:09,384 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:09,384 INFO L221 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 [2018-07-23 23:39:09,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:09,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:09,476 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:09,476 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-07-23 23:39:09,477 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 23:39:09,477 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 23:39:09,477 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:39:09,478 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 37 states. [2018-07-23 23:39:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:11,154 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2018-07-23 23:39:11,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 23:39:11,154 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 105 [2018-07-23 23:39:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:11,155 INFO L225 Difference]: With dead ends: 181 [2018-07-23 23:39:11,155 INFO L226 Difference]: Without dead ends: 108 [2018-07-23 23:39:11,156 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:39:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-23 23:39:11,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-07-23 23:39:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-23 23:39:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-07-23 23:39:11,169 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2018-07-23 23:39:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:11,170 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-07-23 23:39:11,170 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 23:39:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-07-23 23:39:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-23 23:39:11,170 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:11,170 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:11,170 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash 898056891, now seen corresponding path program 32 times [2018-07-23 23:39:11,171 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:11,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:11,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:11,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:11,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:11,648 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:11,648 INFO L221 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 [2018-07-23 23:39:11,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:11,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:11,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:11,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:11,761 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:11,762 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-07-23 23:39:11,762 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 23:39:11,762 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 23:39:11,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:39:11,763 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2018-07-23 23:39:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:12,140 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-07-23 23:39:12,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 23:39:12,140 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-07-23 23:39:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:12,141 INFO L225 Difference]: With dead ends: 121 [2018-07-23 23:39:12,141 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 23:39:12,142 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=634, Invalid=1088, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:39:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 23:39:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2018-07-23 23:39:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-23 23:39:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-07-23 23:39:12,158 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2018-07-23 23:39:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:12,158 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-07-23 23:39:12,158 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 23:39:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-07-23 23:39:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-23 23:39:12,159 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:12,159 INFO L353 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:12,159 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:12,159 INFO L82 PathProgramCache]: Analyzing trace with hash -817384956, now seen corresponding path program 33 times [2018-07-23 23:39:12,159 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:12,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:12,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:12,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:12,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:12,959 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:12,959 INFO L221 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 [2018-07-23 23:39:12,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:13,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-07-23 23:39:13,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:13,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:13,072 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:13,072 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-07-23 23:39:13,073 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 23:39:13,073 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 23:39:13,073 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:39:13,074 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 39 states. [2018-07-23 23:39:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:14,114 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2018-07-23 23:39:14,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 23:39:14,114 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 111 [2018-07-23 23:39:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:14,115 INFO L225 Difference]: With dead ends: 191 [2018-07-23 23:39:14,115 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 23:39:14,116 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=2507, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 23:39:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 23:39:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-07-23 23:39:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-23 23:39:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-07-23 23:39:14,131 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-07-23 23:39:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:14,132 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-07-23 23:39:14,132 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 23:39:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-07-23 23:39:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-23 23:39:14,132 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:14,133 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:14,133 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash -147220546, now seen corresponding path program 34 times [2018-07-23 23:39:14,133 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:14,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:14,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:14,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:14,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:14,742 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:14,742 INFO L221 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 [2018-07-23 23:39:14,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:14,800 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:14,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:14,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:14,887 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:14,887 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-07-23 23:39:14,887 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 23:39:14,888 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 23:39:14,888 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:39:14,888 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 24 states. [2018-07-23 23:39:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:15,902 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-07-23 23:39:15,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 23:39:15,902 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2018-07-23 23:39:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:15,904 INFO L225 Difference]: With dead ends: 127 [2018-07-23 23:39:15,904 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 23:39:15,905 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=697, Invalid=1195, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:39:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 23:39:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2018-07-23 23:39:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-23 23:39:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-07-23 23:39:15,925 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2018-07-23 23:39:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:15,925 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-07-23 23:39:15,925 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 23:39:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-07-23 23:39:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-23 23:39:15,926 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:15,926 INFO L353 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:15,926 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:15,926 INFO L82 PathProgramCache]: Analyzing trace with hash 368168327, now seen corresponding path program 35 times [2018-07-23 23:39:15,927 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:15,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:15,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:15,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:15,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:17,776 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:17,776 INFO L221 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 [2018-07-23 23:39:17,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:17,945 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-07-23 23:39:17,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:17,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:18,002 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:18,002 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-07-23 23:39:18,003 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:39:18,003 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:39:18,003 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:39:18,004 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 41 states. [2018-07-23 23:39:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:18,728 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2018-07-23 23:39:18,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 23:39:18,728 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 117 [2018-07-23 23:39:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:18,729 INFO L225 Difference]: With dead ends: 201 [2018-07-23 23:39:18,729 INFO L226 Difference]: Without dead ends: 120 [2018-07-23 23:39:18,730 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=881, Invalid=2779, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 23:39:18,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-23 23:39:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-07-23 23:39:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-23 23:39:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-07-23 23:39:18,746 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2018-07-23 23:39:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:18,746 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-07-23 23:39:18,746 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:39:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-07-23 23:39:18,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-23 23:39:18,747 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:18,747 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:18,747 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:18,748 INFO L82 PathProgramCache]: Analyzing trace with hash 661323713, now seen corresponding path program 36 times [2018-07-23 23:39:18,748 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:18,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:18,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:18,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:18,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:19,200 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:19,200 INFO L221 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 [2018-07-23 23:39:19,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:39:19,275 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-07-23 23:39:19,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:19,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:19,620 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:19,621 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-07-23 23:39:19,621 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 23:39:19,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 23:39:19,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:39:19,622 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 25 states. [2018-07-23 23:39:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:20,655 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-07-23 23:39:20,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 23:39:20,655 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2018-07-23 23:39:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:20,657 INFO L225 Difference]: With dead ends: 133 [2018-07-23 23:39:20,657 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 23:39:20,658 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=763, Invalid=1307, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:39:20,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 23:39:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2018-07-23 23:39:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-23 23:39:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-07-23 23:39:20,680 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2018-07-23 23:39:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:20,680 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-07-23 23:39:20,681 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 23:39:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-07-23 23:39:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-23 23:39:20,681 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:20,681 INFO L353 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:20,681 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:20,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2136570890, now seen corresponding path program 37 times [2018-07-23 23:39:20,682 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:20,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:20,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:20,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:20,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:22,591 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:22,591 INFO L221 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 [2018-07-23 23:39:22,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:22,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:22,705 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:22,706 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-07-23 23:39:22,706 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 23:39:22,706 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 23:39:22,707 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:39:22,707 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 43 states. [2018-07-23 23:39:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:23,687 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-07-23 23:39:23,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 23:39:23,687 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 123 [2018-07-23 23:39:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:23,688 INFO L225 Difference]: With dead ends: 211 [2018-07-23 23:39:23,688 INFO L226 Difference]: Without dead ends: 126 [2018-07-23 23:39:23,689 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=967, Invalid=3065, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 23:39:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-23 23:39:23,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-07-23 23:39:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-23 23:39:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-07-23 23:39:23,713 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2018-07-23 23:39:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:23,713 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-07-23 23:39:23,713 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 23:39:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-07-23 23:39:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-23 23:39:23,714 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:23,714 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:23,715 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:23,715 INFO L82 PathProgramCache]: Analyzing trace with hash -976315708, now seen corresponding path program 38 times [2018-07-23 23:39:23,715 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:23,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:23,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:23,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:23,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:24,358 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:24,358 INFO L221 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 [2018-07-23 23:39:24,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:24,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:24,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:24,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:24,824 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:24,825 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-07-23 23:39:24,825 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 23:39:24,825 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 23:39:24,826 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:39:24,826 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 26 states. [2018-07-23 23:39:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:25,309 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-07-23 23:39:25,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 23:39:25,310 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2018-07-23 23:39:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:25,311 INFO L225 Difference]: With dead ends: 139 [2018-07-23 23:39:25,311 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 23:39:25,312 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=832, Invalid=1424, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:39:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 23:39:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2018-07-23 23:39:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-23 23:39:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-07-23 23:39:25,332 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2018-07-23 23:39:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:25,332 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-07-23 23:39:25,332 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 23:39:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-07-23 23:39:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-23 23:39:25,333 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:25,333 INFO L353 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:25,333 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:25,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1130242675, now seen corresponding path program 39 times [2018-07-23 23:39:25,334 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:25,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:25,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:25,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:25,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:27,333 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:27,333 INFO L221 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 [2018-07-23 23:39:27,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:27,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-07-23 23:39:27,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:27,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:27,531 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:27,532 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-07-23 23:39:27,532 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:39:27,532 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:39:27,533 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:39:27,533 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 45 states. [2018-07-23 23:39:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:28,678 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-07-23 23:39:28,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 23:39:28,678 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 129 [2018-07-23 23:39:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:28,679 INFO L225 Difference]: With dead ends: 221 [2018-07-23 23:39:28,679 INFO L226 Difference]: Without dead ends: 132 [2018-07-23 23:39:28,680 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1057, Invalid=3365, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 23:39:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-23 23:39:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-07-23 23:39:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-23 23:39:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-07-23 23:39:28,705 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-07-23 23:39:28,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:28,706 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-07-23 23:39:28,706 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:39:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-07-23 23:39:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-23 23:39:28,706 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:28,707 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:28,707 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:28,707 INFO L82 PathProgramCache]: Analyzing trace with hash 26183879, now seen corresponding path program 40 times [2018-07-23 23:39:28,707 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:28,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:28,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:28,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:28,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:29,174 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:29,174 INFO L221 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 [2018-07-23 23:39:29,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:29,235 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:29,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:29,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:29,318 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:29,318 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-07-23 23:39:29,318 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 23:39:29,318 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 23:39:29,319 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:39:29,319 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 27 states. [2018-07-23 23:39:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:29,886 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-07-23 23:39:29,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 23:39:29,887 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2018-07-23 23:39:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:29,888 INFO L225 Difference]: With dead ends: 145 [2018-07-23 23:39:29,888 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 23:39:29,889 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=904, Invalid=1546, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:39:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 23:39:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2018-07-23 23:39:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-23 23:39:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-07-23 23:39:29,915 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2018-07-23 23:39:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:29,915 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-07-23 23:39:29,915 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 23:39:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-07-23 23:39:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-23 23:39:29,916 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:29,916 INFO L353 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:29,916 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 845550096, now seen corresponding path program 41 times [2018-07-23 23:39:29,916 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:29,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:29,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:29,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:29,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:30,771 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:30,771 INFO L221 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 [2018-07-23 23:39:30,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:30,863 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-07-23 23:39:30,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:30,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:30,923 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:30,924 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-07-23 23:39:30,924 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 23:39:30,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 23:39:30,925 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:39:30,925 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 47 states. [2018-07-23 23:39:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:32,066 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2018-07-23 23:39:32,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 23:39:32,066 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 135 [2018-07-23 23:39:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:32,066 INFO L225 Difference]: With dead ends: 231 [2018-07-23 23:39:32,067 INFO L226 Difference]: Without dead ends: 138 [2018-07-23 23:39:32,067 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1151, Invalid=3679, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 23:39:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-23 23:39:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-07-23 23:39:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-23 23:39:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-07-23 23:39:32,092 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2018-07-23 23:39:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:32,093 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-07-23 23:39:32,093 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 23:39:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-07-23 23:39:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-23 23:39:32,093 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:32,094 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:32,094 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:32,094 INFO L82 PathProgramCache]: Analyzing trace with hash 391178698, now seen corresponding path program 42 times [2018-07-23 23:39:32,094 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:32,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:32,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:32,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:32,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:33,343 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:33,343 INFO L221 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 [2018-07-23 23:39:33,350 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:39:33,421 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-07-23 23:39:33,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:33,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:33,591 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:33,591 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-07-23 23:39:33,592 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 23:39:33,592 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 23:39:33,592 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:39:33,592 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 28 states. [2018-07-23 23:39:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:34,078 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-07-23 23:39:34,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 23:39:34,078 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2018-07-23 23:39:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:34,079 INFO L225 Difference]: With dead ends: 151 [2018-07-23 23:39:34,079 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 23:39:34,079 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=979, Invalid=1673, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:39:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 23:39:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2018-07-23 23:39:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-23 23:39:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-07-23 23:39:34,101 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2018-07-23 23:39:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:34,102 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-07-23 23:39:34,102 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 23:39:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-07-23 23:39:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-23 23:39:34,102 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:34,102 INFO L353 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:34,102 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:34,103 INFO L82 PathProgramCache]: Analyzing trace with hash -692504173, now seen corresponding path program 43 times [2018-07-23 23:39:34,103 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:34,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:34,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:34,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:34,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:34,893 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:34,893 INFO L221 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 [2018-07-23 23:39:34,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:34,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:35,014 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:35,015 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-07-23 23:39:35,015 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 23:39:35,015 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 23:39:35,015 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:39:35,016 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 49 states. [2018-07-23 23:39:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:36,364 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-07-23 23:39:36,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 23:39:36,364 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 141 [2018-07-23 23:39:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:36,365 INFO L225 Difference]: With dead ends: 241 [2018-07-23 23:39:36,365 INFO L226 Difference]: Without dead ends: 144 [2018-07-23 23:39:36,366 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1249, Invalid=4007, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 23:39:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-23 23:39:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-07-23 23:39:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-23 23:39:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-07-23 23:39:36,389 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-07-23 23:39:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:36,389 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-07-23 23:39:36,389 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 23:39:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-07-23 23:39:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-23 23:39:36,390 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:36,390 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:36,390 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:36,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1355948595, now seen corresponding path program 44 times [2018-07-23 23:39:36,391 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:36,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:36,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:36,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:36,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:36,952 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:36,952 INFO L221 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 [2018-07-23 23:39:36,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:37,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:37,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:37,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:37,303 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:37,303 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-07-23 23:39:37,304 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:39:37,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:39:37,304 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:39:37,304 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 29 states. [2018-07-23 23:39:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:37,847 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-07-23 23:39:37,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 23:39:37,847 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 143 [2018-07-23 23:39:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:37,849 INFO L225 Difference]: With dead ends: 157 [2018-07-23 23:39:37,849 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 23:39:37,849 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1057, Invalid=1805, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 23:39:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 23:39:37,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-07-23 23:39:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-23 23:39:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-07-23 23:39:37,882 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2018-07-23 23:39:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:37,882 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-07-23 23:39:37,882 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:39:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-07-23 23:39:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-23 23:39:37,883 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:37,883 INFO L353 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:37,883 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:37,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1893305322, now seen corresponding path program 45 times [2018-07-23 23:39:37,884 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:37,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:37,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:37,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:37,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:38,804 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:38,805 INFO L221 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 [2018-07-23 23:39:38,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:38,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-07-23 23:39:38,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:38,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:38,980 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:38,981 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-07-23 23:39:38,981 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 23:39:38,981 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 23:39:38,982 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:39:38,982 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 51 states. [2018-07-23 23:39:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:41,325 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2018-07-23 23:39:41,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 23:39:41,326 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 147 [2018-07-23 23:39:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:41,326 INFO L225 Difference]: With dead ends: 251 [2018-07-23 23:39:41,327 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 23:39:41,327 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1351, Invalid=4349, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 23:39:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 23:39:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-07-23 23:39:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-23 23:39:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-07-23 23:39:41,361 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-07-23 23:39:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:41,361 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-07-23 23:39:41,361 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 23:39:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-07-23 23:39:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-23 23:39:41,362 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:41,362 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:41,363 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:41,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1162246960, now seen corresponding path program 46 times [2018-07-23 23:39:41,363 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:41,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:41,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:41,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:41,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:42,124 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:42,124 INFO L221 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 [2018-07-23 23:39:42,132 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:42,192 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:42,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:42,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:42,302 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:42,302 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-07-23 23:39:42,302 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 23:39:42,303 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 23:39:42,303 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:39:42,303 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 30 states. [2018-07-23 23:39:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:42,871 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2018-07-23 23:39:42,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 23:39:42,872 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2018-07-23 23:39:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:42,873 INFO L225 Difference]: With dead ends: 163 [2018-07-23 23:39:42,873 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 23:39:42,874 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1138, Invalid=1942, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 23:39:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 23:39:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2018-07-23 23:39:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-23 23:39:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-07-23 23:39:42,909 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2018-07-23 23:39:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:42,910 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-07-23 23:39:42,910 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 23:39:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-07-23 23:39:42,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-23 23:39:42,911 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:42,911 INFO L353 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:42,911 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:42,911 INFO L82 PathProgramCache]: Analyzing trace with hash 246473113, now seen corresponding path program 47 times [2018-07-23 23:39:42,911 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:42,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:42,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:42,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:42,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:43,783 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:43,783 INFO L221 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 [2018-07-23 23:39:43,791 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:43,878 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-07-23 23:39:43,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:43,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:43,931 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:43,931 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-07-23 23:39:43,931 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 23:39:43,931 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 23:39:43,932 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:39:43,932 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 53 states. [2018-07-23 23:39:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:45,668 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2018-07-23 23:39:45,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 23:39:45,669 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 153 [2018-07-23 23:39:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:45,670 INFO L225 Difference]: With dead ends: 261 [2018-07-23 23:39:45,670 INFO L226 Difference]: Without dead ends: 156 [2018-07-23 23:39:45,670 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1457, Invalid=4705, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 23:39:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-23 23:39:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-07-23 23:39:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-23 23:39:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-07-23 23:39:45,701 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2018-07-23 23:39:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:45,701 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-07-23 23:39:45,701 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 23:39:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-07-23 23:39:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-23 23:39:45,702 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:45,702 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:45,702 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:45,703 INFO L82 PathProgramCache]: Analyzing trace with hash -755040557, now seen corresponding path program 48 times [2018-07-23 23:39:45,703 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:45,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:45,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:45,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:45,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:46,407 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:46,407 INFO L221 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 [2018-07-23 23:39:46,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:39:46,510 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-07-23 23:39:46,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:46,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:46,596 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:46,596 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-07-23 23:39:46,597 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 23:39:46,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 23:39:46,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:39:46,597 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 31 states. [2018-07-23 23:39:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:47,180 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-07-23 23:39:47,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 23:39:47,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 155 [2018-07-23 23:39:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:47,182 INFO L225 Difference]: With dead ends: 169 [2018-07-23 23:39:47,182 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 23:39:47,183 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1222, Invalid=2084, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 23:39:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 23:39:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2018-07-23 23:39:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-23 23:39:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-07-23 23:39:47,212 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2018-07-23 23:39:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:47,212 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-07-23 23:39:47,212 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 23:39:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-07-23 23:39:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-23 23:39:47,213 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:47,214 INFO L353 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:47,214 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:47,214 INFO L82 PathProgramCache]: Analyzing trace with hash 869507612, now seen corresponding path program 49 times [2018-07-23 23:39:47,214 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:47,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:47,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:47,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:47,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:48,208 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:48,208 INFO L221 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 [2018-07-23 23:39:48,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:48,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:48,346 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:48,347 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-07-23 23:39:48,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 23:39:48,348 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 23:39:48,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:39:48,348 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 55 states. [2018-07-23 23:39:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:49,633 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-07-23 23:39:49,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 23:39:49,633 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 159 [2018-07-23 23:39:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:49,634 INFO L225 Difference]: With dead ends: 271 [2018-07-23 23:39:49,634 INFO L226 Difference]: Without dead ends: 162 [2018-07-23 23:39:49,635 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1567, Invalid=5075, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 23:39:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-23 23:39:49,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-07-23 23:39:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-23 23:39:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-07-23 23:39:49,663 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-07-23 23:39:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:49,663 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-07-23 23:39:49,663 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 23:39:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-07-23 23:39:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-23 23:39:49,664 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:49,664 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:49,664 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:49,664 INFO L82 PathProgramCache]: Analyzing trace with hash 377580502, now seen corresponding path program 50 times [2018-07-23 23:39:49,664 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:49,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:49,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:49,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:39:49,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:50,206 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:50,206 INFO L221 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 [2018-07-23 23:39:50,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:39:50,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:39:50,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:50,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:50,771 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:50,771 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-07-23 23:39:50,772 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 23:39:50,772 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 23:39:50,772 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:39:50,772 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 32 states. [2018-07-23 23:39:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:51,425 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2018-07-23 23:39:51,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 23:39:51,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2018-07-23 23:39:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:51,427 INFO L225 Difference]: With dead ends: 175 [2018-07-23 23:39:51,427 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 23:39:51,427 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1309, Invalid=2231, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 23:39:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 23:39:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2018-07-23 23:39:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-23 23:39:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-07-23 23:39:51,467 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2018-07-23 23:39:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:51,467 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-07-23 23:39:51,467 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 23:39:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-07-23 23:39:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-23 23:39:51,468 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:51,468 INFO L353 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:51,468 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash -427698785, now seen corresponding path program 51 times [2018-07-23 23:39:51,469 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:51,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:51,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:51,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:51,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:52,566 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:52,566 INFO L221 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 [2018-07-23 23:39:52,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:39:52,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-07-23 23:39:52,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:52,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:52,725 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:52,725 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-07-23 23:39:52,725 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 23:39:52,725 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 23:39:52,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 23:39:52,726 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 57 states. [2018-07-23 23:39:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:53,947 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-07-23 23:39:53,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 23:39:53,947 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 165 [2018-07-23 23:39:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:53,948 INFO L225 Difference]: With dead ends: 281 [2018-07-23 23:39:53,948 INFO L226 Difference]: Without dead ends: 168 [2018-07-23 23:39:53,949 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1681, Invalid=5459, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 23:39:53,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-23 23:39:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-07-23 23:39:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-23 23:39:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-07-23 23:39:53,979 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2018-07-23 23:39:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:53,979 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-07-23 23:39:53,979 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 23:39:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-07-23 23:39:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-23 23:39:53,980 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:53,980 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:53,980 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2026116135, now seen corresponding path program 52 times [2018-07-23 23:39:53,980 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:53,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:53,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:53,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:53,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:54,601 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:54,601 INFO L221 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 [2018-07-23 23:39:54,611 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:39:54,675 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:39:54,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:54,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:54,838 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:54,839 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-07-23 23:39:54,839 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:39:54,839 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:39:54,839 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:39:54,840 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 33 states. [2018-07-23 23:39:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:55,593 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-07-23 23:39:55,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 23:39:55,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 167 [2018-07-23 23:39:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:55,594 INFO L225 Difference]: With dead ends: 181 [2018-07-23 23:39:55,594 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 23:39:55,595 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1399, Invalid=2383, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 23:39:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 23:39:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2018-07-23 23:39:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-23 23:39:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2018-07-23 23:39:55,631 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2018-07-23 23:39:55,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:55,631 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2018-07-23 23:39:55,631 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:39:55,631 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2018-07-23 23:39:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-23 23:39:55,632 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:55,632 INFO L353 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:55,632 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:55,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1982241826, now seen corresponding path program 53 times [2018-07-23 23:39:55,632 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:55,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:55,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:55,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:55,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:56,807 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:56,807 INFO L221 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 [2018-07-23 23:39:56,816 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:39:56,917 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-07-23 23:39:56,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:56,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:56,965 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:56,965 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-07-23 23:39:56,966 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 23:39:56,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 23:39:56,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 23:39:56,966 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 59 states. [2018-07-23 23:39:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:39:58,657 INFO L93 Difference]: Finished difference Result 291 states and 293 transitions. [2018-07-23 23:39:58,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 23:39:58,657 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 171 [2018-07-23 23:39:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:39:58,658 INFO L225 Difference]: With dead ends: 291 [2018-07-23 23:39:58,658 INFO L226 Difference]: Without dead ends: 174 [2018-07-23 23:39:58,659 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1799, Invalid=5857, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 23:39:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-23 23:39:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-07-23 23:39:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-23 23:39:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-07-23 23:39:58,692 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2018-07-23 23:39:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:39:58,692 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-07-23 23:39:58,692 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 23:39:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-07-23 23:39:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-23 23:39:58,693 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:39:58,693 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-07-23 23:39:58,693 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:39:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash -392061220, now seen corresponding path program 54 times [2018-07-23 23:39:58,694 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:39:58,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:39:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:58,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:39:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:39:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:39:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:59,212 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:39:59,212 INFO L221 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 [2018-07-23 23:39:59,221 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:39:59,323 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-07-23 23:39:59,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:39:59,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:39:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:39:59,623 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:39:59,623 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-07-23 23:39:59,624 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 23:39:59,624 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 23:39:59,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:39:59,624 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 34 states. [2018-07-23 23:40:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:00,327 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2018-07-23 23:40:00,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 23:40:00,328 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2018-07-23 23:40:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:00,329 INFO L225 Difference]: With dead ends: 187 [2018-07-23 23:40:00,329 INFO L226 Difference]: Without dead ends: 185 [2018-07-23 23:40:00,329 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1492, Invalid=2540, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 23:40:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-23 23:40:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2018-07-23 23:40:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-23 23:40:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-07-23 23:40:00,377 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2018-07-23 23:40:00,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:00,378 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-07-23 23:40:00,378 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 23:40:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-07-23 23:40:00,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-23 23:40:00,379 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:00,379 INFO L353 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:00,379 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:00,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2007307685, now seen corresponding path program 55 times [2018-07-23 23:40:00,379 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:00,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:00,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:00,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:00,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:01,733 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:01,733 INFO L221 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 [2018-07-23 23:40:01,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:01,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:01,892 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:01,893 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-07-23 23:40:01,893 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 23:40:01,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 23:40:01,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 23:40:01,894 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 61 states. [2018-07-23 23:40:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:03,811 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-07-23 23:40:03,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 23:40:03,811 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 177 [2018-07-23 23:40:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:03,812 INFO L225 Difference]: With dead ends: 301 [2018-07-23 23:40:03,812 INFO L226 Difference]: Without dead ends: 180 [2018-07-23 23:40:03,813 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1921, Invalid=6269, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 23:40:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-23 23:40:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-07-23 23:40:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-23 23:40:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2018-07-23 23:40:03,851 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2018-07-23 23:40:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:03,851 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2018-07-23 23:40:03,852 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 23:40:03,852 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2018-07-23 23:40:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-23 23:40:03,853 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:03,853 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:03,853 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash 496870623, now seen corresponding path program 56 times [2018-07-23 23:40:03,853 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:03,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:03,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:03,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:03,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:04,341 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:04,341 INFO L221 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 [2018-07-23 23:40:04,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:04,422 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:04,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:04,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:04,536 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:04,537 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-07-23 23:40:04,537 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 23:40:04,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 23:40:04,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:40:04,538 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 35 states. [2018-07-23 23:40:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:05,320 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-07-23 23:40:05,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 23:40:05,320 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 179 [2018-07-23 23:40:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:05,321 INFO L225 Difference]: With dead ends: 193 [2018-07-23 23:40:05,321 INFO L226 Difference]: Without dead ends: 191 [2018-07-23 23:40:05,322 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1588, Invalid=2702, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 23:40:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-23 23:40:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2018-07-23 23:40:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-23 23:40:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-07-23 23:40:05,360 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2018-07-23 23:40:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:05,360 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-07-23 23:40:05,360 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 23:40:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-07-23 23:40:05,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-23 23:40:05,361 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:05,361 INFO L353 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:05,361 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:05,362 INFO L82 PathProgramCache]: Analyzing trace with hash 592994856, now seen corresponding path program 57 times [2018-07-23 23:40:05,362 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:05,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:05,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:05,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:05,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:06,847 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:06,847 INFO L221 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 [2018-07-23 23:40:06,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:06,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-07-23 23:40:06,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:06,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:07,025 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:07,025 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-07-23 23:40:07,025 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 23:40:07,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 23:40:07,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=2913, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 23:40:07,026 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 63 states. [2018-07-23 23:40:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:09,173 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2018-07-23 23:40:09,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 23:40:09,173 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 183 [2018-07-23 23:40:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:09,174 INFO L225 Difference]: With dead ends: 311 [2018-07-23 23:40:09,174 INFO L226 Difference]: Without dead ends: 186 [2018-07-23 23:40:09,175 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2047, Invalid=6695, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 23:40:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-23 23:40:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-07-23 23:40:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-23 23:40:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-07-23 23:40:09,218 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2018-07-23 23:40:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:09,218 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-07-23 23:40:09,218 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 23:40:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-07-23 23:40:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-07-23 23:40:09,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:09,219 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:09,219 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:09,219 INFO L82 PathProgramCache]: Analyzing trace with hash 110304738, now seen corresponding path program 58 times [2018-07-23 23:40:09,219 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:09,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:09,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:09,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:09,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:09,730 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:09,730 INFO L221 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 [2018-07-23 23:40:09,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:09,820 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:09,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:09,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:09,919 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:09,919 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-07-23 23:40:09,919 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 23:40:09,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 23:40:09,920 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:40:09,920 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 36 states. [2018-07-23 23:40:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:10,660 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2018-07-23 23:40:10,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 23:40:10,660 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 185 [2018-07-23 23:40:10,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:10,661 INFO L225 Difference]: With dead ends: 199 [2018-07-23 23:40:10,662 INFO L226 Difference]: Without dead ends: 197 [2018-07-23 23:40:10,662 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1687, Invalid=2869, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 23:40:10,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-23 23:40:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2018-07-23 23:40:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-07-23 23:40:10,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-07-23 23:40:10,702 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2018-07-23 23:40:10,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:10,702 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-07-23 23:40:10,702 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 23:40:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-07-23 23:40:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-23 23:40:10,703 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:10,703 INFO L353 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:10,703 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:10,704 INFO L82 PathProgramCache]: Analyzing trace with hash 856924587, now seen corresponding path program 59 times [2018-07-23 23:40:10,704 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:10,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:10,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:10,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:10,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:12,159 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:12,159 INFO L221 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 [2018-07-23 23:40:12,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:12,284 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-07-23 23:40:12,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:12,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:12,345 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:12,345 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-07-23 23:40:12,345 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 23:40:12,346 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 23:40:12,346 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 23:40:12,346 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 65 states. [2018-07-23 23:40:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:14,509 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2018-07-23 23:40:14,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 23:40:14,509 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 189 [2018-07-23 23:40:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:14,510 INFO L225 Difference]: With dead ends: 321 [2018-07-23 23:40:14,510 INFO L226 Difference]: Without dead ends: 192 [2018-07-23 23:40:14,511 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2177, Invalid=7135, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 23:40:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-07-23 23:40:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-07-23 23:40:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-07-23 23:40:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2018-07-23 23:40:14,555 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2018-07-23 23:40:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:14,556 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2018-07-23 23:40:14,556 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 23:40:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2018-07-23 23:40:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-07-23 23:40:14,556 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:14,557 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:14,557 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash -547542555, now seen corresponding path program 60 times [2018-07-23 23:40:14,557 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:14,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:14,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:14,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:14,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:15,085 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:15,085 INFO L221 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 [2018-07-23 23:40:15,092 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:15,217 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-07-23 23:40:15,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:15,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:15,290 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:15,290 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-07-23 23:40:15,290 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 23:40:15,291 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 23:40:15,291 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:40:15,291 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 37 states. [2018-07-23 23:40:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:16,285 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-07-23 23:40:16,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 23:40:16,285 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2018-07-23 23:40:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:16,287 INFO L225 Difference]: With dead ends: 205 [2018-07-23 23:40:16,287 INFO L226 Difference]: Without dead ends: 203 [2018-07-23 23:40:16,288 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1789, Invalid=3041, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 23:40:16,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-23 23:40:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2018-07-23 23:40:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-23 23:40:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-07-23 23:40:16,335 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2018-07-23 23:40:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:16,335 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-07-23 23:40:16,335 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 23:40:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-07-23 23:40:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-23 23:40:16,336 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:16,337 INFO L353 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:16,337 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1075967022, now seen corresponding path program 61 times [2018-07-23 23:40:16,337 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:16,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:16,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:16,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:16,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:17,613 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:17,613 INFO L221 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 [2018-07-23 23:40:17,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:17,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:17,775 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:17,775 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-07-23 23:40:17,775 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 23:40:17,776 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 23:40:17,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=3299, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 23:40:17,776 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 67 states. [2018-07-23 23:40:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:20,079 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-07-23 23:40:20,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 23:40:20,079 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 195 [2018-07-23 23:40:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:20,080 INFO L225 Difference]: With dead ends: 331 [2018-07-23 23:40:20,080 INFO L226 Difference]: Without dead ends: 198 [2018-07-23 23:40:20,081 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2311, Invalid=7589, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 23:40:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-07-23 23:40:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-07-23 23:40:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-07-23 23:40:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2018-07-23 23:40:20,125 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2018-07-23 23:40:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:20,126 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2018-07-23 23:40:20,126 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 23:40:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2018-07-23 23:40:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-07-23 23:40:20,127 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:20,127 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:20,128 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:20,128 INFO L82 PathProgramCache]: Analyzing trace with hash 491710696, now seen corresponding path program 62 times [2018-07-23 23:40:20,128 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:20,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:20,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:20,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:20,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:20,693 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:20,694 INFO L221 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 [2018-07-23 23:40:20,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:20,790 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:20,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:20,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:20,897 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:20,898 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-07-23 23:40:20,898 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 23:40:20,898 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 23:40:20,898 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:40:20,899 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 38 states. [2018-07-23 23:40:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:21,892 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2018-07-23 23:40:21,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 23:40:21,893 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2018-07-23 23:40:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:21,894 INFO L225 Difference]: With dead ends: 211 [2018-07-23 23:40:21,894 INFO L226 Difference]: Without dead ends: 209 [2018-07-23 23:40:21,894 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1894, Invalid=3218, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 23:40:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-07-23 23:40:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2018-07-23 23:40:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-07-23 23:40:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-07-23 23:40:21,936 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2018-07-23 23:40:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:21,936 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-07-23 23:40:21,936 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 23:40:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-07-23 23:40:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-23 23:40:21,937 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:21,938 INFO L353 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:21,938 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:21,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1589216847, now seen corresponding path program 63 times [2018-07-23 23:40:21,938 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:21,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:21,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:21,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:21,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:23,303 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:23,303 INFO L221 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 [2018-07-23 23:40:23,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:23,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-07-23 23:40:23,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:23,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:23,521 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:23,522 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-07-23 23:40:23,522 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 23:40:23,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 23:40:23,523 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=3501, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 23:40:23,523 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 69 states. [2018-07-23 23:40:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:25,982 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2018-07-23 23:40:25,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 23:40:25,983 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 201 [2018-07-23 23:40:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:25,983 INFO L225 Difference]: With dead ends: 341 [2018-07-23 23:40:25,984 INFO L226 Difference]: Without dead ends: 204 [2018-07-23 23:40:25,984 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2449, Invalid=8057, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 23:40:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-07-23 23:40:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-07-23 23:40:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-07-23 23:40:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-07-23 23:40:26,028 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2018-07-23 23:40:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:26,028 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-07-23 23:40:26,028 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 23:40:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-07-23 23:40:26,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-23 23:40:26,029 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:26,029 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:26,030 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:26,030 INFO L82 PathProgramCache]: Analyzing trace with hash -852264213, now seen corresponding path program 64 times [2018-07-23 23:40:26,030 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:26,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:26,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:26,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:26,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:26,906 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:26,906 INFO L221 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 [2018-07-23 23:40:26,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:27,005 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:27,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:27,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:27,132 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:27,132 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-07-23 23:40:27,132 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 23:40:27,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 23:40:27,133 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:40:27,133 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 39 states. [2018-07-23 23:40:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:27,995 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-07-23 23:40:27,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 23:40:27,996 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 203 [2018-07-23 23:40:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:27,997 INFO L225 Difference]: With dead ends: 217 [2018-07-23 23:40:27,997 INFO L226 Difference]: Without dead ends: 215 [2018-07-23 23:40:27,997 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2002, Invalid=3400, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 23:40:27,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-07-23 23:40:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 208. [2018-07-23 23:40:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-07-23 23:40:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-07-23 23:40:28,045 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2018-07-23 23:40:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:28,045 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-07-23 23:40:28,045 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 23:40:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-07-23 23:40:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-23 23:40:28,046 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:28,046 INFO L353 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:28,046 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash -927182284, now seen corresponding path program 65 times [2018-07-23 23:40:28,047 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:28,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:28,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:29,546 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:29,546 INFO L221 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 [2018-07-23 23:40:29,553 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:29,680 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-07-23 23:40:29,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:29,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:29,742 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:29,742 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-07-23 23:40:29,743 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 23:40:29,743 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 23:40:29,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=3709, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 23:40:29,743 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 71 states. [2018-07-23 23:40:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:32,508 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2018-07-23 23:40:32,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 23:40:32,508 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 207 [2018-07-23 23:40:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:32,509 INFO L225 Difference]: With dead ends: 351 [2018-07-23 23:40:32,509 INFO L226 Difference]: Without dead ends: 210 [2018-07-23 23:40:32,510 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2591, Invalid=8539, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 23:40:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-07-23 23:40:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-07-23 23:40:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-07-23 23:40:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-07-23 23:40:32,561 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-07-23 23:40:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:32,562 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-07-23 23:40:32,562 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 23:40:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-07-23 23:40:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-23 23:40:32,562 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:32,563 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:32,563 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:32,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1900937198, now seen corresponding path program 66 times [2018-07-23 23:40:32,563 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:32,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:32,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:32,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:32,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:33,203 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:33,204 INFO L221 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 [2018-07-23 23:40:33,212 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:33,344 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-07-23 23:40:33,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:33,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:33,444 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:33,444 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-07-23 23:40:33,444 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 23:40:33,444 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 23:40:33,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:40:33,445 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 40 states. [2018-07-23 23:40:34,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:34,341 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2018-07-23 23:40:34,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 23:40:34,341 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 209 [2018-07-23 23:40:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:34,342 INFO L225 Difference]: With dead ends: 223 [2018-07-23 23:40:34,342 INFO L226 Difference]: Without dead ends: 221 [2018-07-23 23:40:34,342 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2113, Invalid=3587, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 23:40:34,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-07-23 23:40:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2018-07-23 23:40:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-23 23:40:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-07-23 23:40:34,399 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2018-07-23 23:40:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:34,399 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-07-23 23:40:34,400 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 23:40:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-07-23 23:40:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-07-23 23:40:34,400 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:34,400 INFO L353 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:34,400 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash 574004663, now seen corresponding path program 67 times [2018-07-23 23:40:34,401 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:34,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:34,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:34,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:34,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:35,958 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:35,958 INFO L221 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 [2018-07-23 23:40:35,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:36,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:36,134 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:36,134 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-07-23 23:40:36,135 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 23:40:36,135 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 23:40:36,135 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3923, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 23:40:36,136 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 73 states. [2018-07-23 23:40:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:39,133 INFO L93 Difference]: Finished difference Result 361 states and 363 transitions. [2018-07-23 23:40:39,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 23:40:39,133 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 213 [2018-07-23 23:40:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:39,134 INFO L225 Difference]: With dead ends: 361 [2018-07-23 23:40:39,134 INFO L226 Difference]: Without dead ends: 216 [2018-07-23 23:40:39,135 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2737, Invalid=9035, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 23:40:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-07-23 23:40:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-07-23 23:40:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-07-23 23:40:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-07-23 23:40:39,183 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2018-07-23 23:40:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:39,183 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-07-23 23:40:39,183 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 23:40:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-07-23 23:40:39,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-07-23 23:40:39,184 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:39,185 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:39,185 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1599707121, now seen corresponding path program 68 times [2018-07-23 23:40:39,185 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:39,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:39,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:39,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:39,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:39,899 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:39,899 INFO L221 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 [2018-07-23 23:40:39,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:39,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:39,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:40,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:40,129 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:40,129 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-07-23 23:40:40,129 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:40:40,130 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:40:40,130 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:40:40,130 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 41 states. [2018-07-23 23:40:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:41,063 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-07-23 23:40:41,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 23:40:41,063 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 215 [2018-07-23 23:40:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:41,064 INFO L225 Difference]: With dead ends: 229 [2018-07-23 23:40:41,064 INFO L226 Difference]: Without dead ends: 227 [2018-07-23 23:40:41,065 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2227, Invalid=3779, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 23:40:41,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-07-23 23:40:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2018-07-23 23:40:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-07-23 23:40:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-07-23 23:40:41,116 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2018-07-23 23:40:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:41,116 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-07-23 23:40:41,116 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:40:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-07-23 23:40:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-23 23:40:41,117 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:41,117 INFO L353 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:41,117 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1893760058, now seen corresponding path program 69 times [2018-07-23 23:40:41,118 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:41,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:41,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:41,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:41,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:43,099 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:43,099 INFO L221 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 [2018-07-23 23:40:43,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:43,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-07-23 23:40:43,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:43,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:43,335 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:43,335 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-07-23 23:40:43,336 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 23:40:43,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 23:40:43,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=4143, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 23:40:43,337 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 75 states. [2018-07-23 23:40:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:46,369 INFO L93 Difference]: Finished difference Result 371 states and 373 transitions. [2018-07-23 23:40:46,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 23:40:46,370 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 219 [2018-07-23 23:40:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:46,371 INFO L225 Difference]: With dead ends: 371 [2018-07-23 23:40:46,371 INFO L226 Difference]: Without dead ends: 222 [2018-07-23 23:40:46,372 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2887, Invalid=9545, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 23:40:46,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-07-23 23:40:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-07-23 23:40:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-07-23 23:40:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2018-07-23 23:40:46,430 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2018-07-23 23:40:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:46,430 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2018-07-23 23:40:46,430 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 23:40:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2018-07-23 23:40:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-23 23:40:46,431 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:46,431 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:46,431 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:46,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163404, now seen corresponding path program 70 times [2018-07-23 23:40:46,431 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:46,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:46,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:46,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:46,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:47,427 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:47,427 INFO L221 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 [2018-07-23 23:40:47,434 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:47,534 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:47,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:47,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:47,655 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:47,655 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-07-23 23:40:47,656 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 23:40:47,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 23:40:47,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:40:47,656 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 42 states. [2018-07-23 23:40:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:48,751 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2018-07-23 23:40:48,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 23:40:48,751 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 221 [2018-07-23 23:40:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:48,752 INFO L225 Difference]: With dead ends: 235 [2018-07-23 23:40:48,752 INFO L226 Difference]: Without dead ends: 233 [2018-07-23 23:40:48,753 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2344, Invalid=3976, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 23:40:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-07-23 23:40:48,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2018-07-23 23:40:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-07-23 23:40:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2018-07-23 23:40:48,811 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2018-07-23 23:40:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:48,811 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2018-07-23 23:40:48,811 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 23:40:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2018-07-23 23:40:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-23 23:40:48,812 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:48,812 INFO L353 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:48,812 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1386410563, now seen corresponding path program 71 times [2018-07-23 23:40:48,812 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:48,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:48,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:48,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:48,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:50,466 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:50,466 INFO L221 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 [2018-07-23 23:40:50,473 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:50,618 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-07-23 23:40:50,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:50,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:50,692 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:50,693 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-07-23 23:40:50,693 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 23:40:50,693 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 23:40:50,693 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 23:40:50,694 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 77 states. [2018-07-23 23:40:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:53,121 INFO L93 Difference]: Finished difference Result 381 states and 383 transitions. [2018-07-23 23:40:53,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 23:40:53,121 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 225 [2018-07-23 23:40:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:53,122 INFO L225 Difference]: With dead ends: 381 [2018-07-23 23:40:53,122 INFO L226 Difference]: Without dead ends: 228 [2018-07-23 23:40:53,123 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3041, Invalid=10069, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 23:40:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-07-23 23:40:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-07-23 23:40:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-07-23 23:40:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2018-07-23 23:40:53,183 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2018-07-23 23:40:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:53,183 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2018-07-23 23:40:53,183 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 23:40:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2018-07-23 23:40:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-07-23 23:40:53,184 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:53,184 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:53,184 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1166573815, now seen corresponding path program 72 times [2018-07-23 23:40:53,185 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:53,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:53,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:53,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:53,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:53,921 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:53,921 INFO L221 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 [2018-07-23 23:40:53,928 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:54,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-07-23 23:40:54,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:54,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:54,184 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:54,184 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-07-23 23:40:54,185 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 23:40:54,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 23:40:54,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:40:54,185 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand 43 states. [2018-07-23 23:40:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:55,201 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-07-23 23:40:55,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 23:40:55,201 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 227 [2018-07-23 23:40:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:55,202 INFO L225 Difference]: With dead ends: 241 [2018-07-23 23:40:55,202 INFO L226 Difference]: Without dead ends: 239 [2018-07-23 23:40:55,203 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2464, Invalid=4178, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 23:40:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-07-23 23:40:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2018-07-23 23:40:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-07-23 23:40:55,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2018-07-23 23:40:55,260 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2018-07-23 23:40:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:55,261 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2018-07-23 23:40:55,261 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 23:40:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2018-07-23 23:40:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-23 23:40:55,261 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:55,262 INFO L353 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:55,262 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1674015296, now seen corresponding path program 73 times [2018-07-23 23:40:55,262 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:55,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:55,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:55,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:55,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:57,263 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:57,263 INFO L221 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 [2018-07-23 23:40:57,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:57,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:57,438 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:57,439 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-07-23 23:40:57,439 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 23:40:57,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 23:40:57,440 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1561, Invalid=4601, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 23:40:57,440 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 79 states. [2018-07-23 23:41:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:00,656 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-07-23 23:41:00,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 23:41:00,656 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 231 [2018-07-23 23:41:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:00,657 INFO L225 Difference]: With dead ends: 391 [2018-07-23 23:41:00,657 INFO L226 Difference]: Without dead ends: 234 [2018-07-23 23:41:00,658 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3199, Invalid=10607, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 23:41:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-07-23 23:41:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-07-23 23:41:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-07-23 23:41:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2018-07-23 23:41:00,722 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2018-07-23 23:41:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:00,723 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2018-07-23 23:41:00,723 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 23:41:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2018-07-23 23:41:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-07-23 23:41:00,724 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:00,724 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:00,724 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:00,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1484395002, now seen corresponding path program 74 times [2018-07-23 23:41:00,724 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:00,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:00,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:00,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:00,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:01,501 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:01,501 INFO L221 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 [2018-07-23 23:41:01,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:01,608 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:01,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:01,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:01,720 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:01,720 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-07-23 23:41:01,720 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 23:41:01,721 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 23:41:01,721 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:41:01,721 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 44 states. [2018-07-23 23:41:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:02,963 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2018-07-23 23:41:02,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 23:41:02,963 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 233 [2018-07-23 23:41:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:02,964 INFO L225 Difference]: With dead ends: 247 [2018-07-23 23:41:02,964 INFO L226 Difference]: Without dead ends: 245 [2018-07-23 23:41:02,965 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2587, Invalid=4385, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 23:41:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-07-23 23:41:03,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2018-07-23 23:41:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-07-23 23:41:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2018-07-23 23:41:03,039 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2018-07-23 23:41:03,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:03,040 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2018-07-23 23:41:03,040 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 23:41:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2018-07-23 23:41:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-23 23:41:03,040 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:03,041 INFO L353 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:03,041 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:03,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1850553917, now seen corresponding path program 75 times [2018-07-23 23:41:03,041 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:03,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:03,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:03,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:03,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:05,023 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:05,023 INFO L221 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 [2018-07-23 23:41:05,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:05,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-07-23 23:41:05,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:05,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:05,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:05,262 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-07-23 23:41:05,263 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 23:41:05,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 23:41:05,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1641, Invalid=4839, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 23:41:05,264 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 81 states. [2018-07-23 23:41:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:07,985 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2018-07-23 23:41:07,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 23:41:07,985 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 237 [2018-07-23 23:41:07,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:07,986 INFO L225 Difference]: With dead ends: 401 [2018-07-23 23:41:07,986 INFO L226 Difference]: Without dead ends: 240 [2018-07-23 23:41:07,987 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3361, Invalid=11159, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 23:41:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-07-23 23:41:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-07-23 23:41:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-07-23 23:41:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2018-07-23 23:41:08,048 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 237 [2018-07-23 23:41:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:08,048 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2018-07-23 23:41:08,048 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 23:41:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2018-07-23 23:41:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-23 23:41:08,049 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:08,049 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:08,049 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:08,049 INFO L82 PathProgramCache]: Analyzing trace with hash 653866493, now seen corresponding path program 76 times [2018-07-23 23:41:08,049 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:08,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:08,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:08,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:08,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:08,830 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:08,830 INFO L221 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 [2018-07-23 23:41:08,837 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:08,944 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:08,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:08,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:09,041 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:09,041 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-07-23 23:41:09,041 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:41:09,042 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:41:09,042 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:41:09,042 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 45 states. [2018-07-23 23:41:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:10,180 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-07-23 23:41:10,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 23:41:10,181 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 239 [2018-07-23 23:41:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:10,182 INFO L225 Difference]: With dead ends: 253 [2018-07-23 23:41:10,182 INFO L226 Difference]: Without dead ends: 251 [2018-07-23 23:41:10,183 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2713, Invalid=4597, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 23:41:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-07-23 23:41:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2018-07-23 23:41:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-07-23 23:41:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2018-07-23 23:41:10,245 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2018-07-23 23:41:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:10,245 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2018-07-23 23:41:10,245 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:41:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2018-07-23 23:41:10,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-23 23:41:10,246 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:10,246 INFO L353 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:10,246 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash 69874758, now seen corresponding path program 77 times [2018-07-23 23:41:10,246 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:10,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:10,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:10,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:10,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:12,306 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:12,306 INFO L221 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 [2018-07-23 23:41:12,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:12,488 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-07-23 23:41:12,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:12,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:12,566 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:12,566 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-07-23 23:41:12,567 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 23:41:12,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 23:41:12,567 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=5083, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 23:41:12,568 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand 83 states. [2018-07-23 23:41:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:15,741 INFO L93 Difference]: Finished difference Result 411 states and 413 transitions. [2018-07-23 23:41:15,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 23:41:15,742 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 243 [2018-07-23 23:41:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:15,743 INFO L225 Difference]: With dead ends: 411 [2018-07-23 23:41:15,743 INFO L226 Difference]: Without dead ends: 246 [2018-07-23 23:41:15,744 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3527, Invalid=11725, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 23:41:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-07-23 23:41:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-07-23 23:41:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-07-23 23:41:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-07-23 23:41:15,808 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 243 [2018-07-23 23:41:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:15,808 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-07-23 23:41:15,808 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 23:41:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-07-23 23:41:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-07-23 23:41:15,809 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:15,809 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:15,809 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:15,810 INFO L82 PathProgramCache]: Analyzing trace with hash 706284800, now seen corresponding path program 78 times [2018-07-23 23:41:15,810 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:15,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:15,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:15,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:15,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:16,670 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:16,670 INFO L221 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 [2018-07-23 23:41:16,678 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:16,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-07-23 23:41:16,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:16,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:17,023 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:17,023 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-07-23 23:41:17,024 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 23:41:17,024 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 23:41:17,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:41:17,024 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 46 states. [2018-07-23 23:41:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:18,422 INFO L93 Difference]: Finished difference Result 259 states and 260 transitions. [2018-07-23 23:41:18,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 23:41:18,422 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 245 [2018-07-23 23:41:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:18,423 INFO L225 Difference]: With dead ends: 259 [2018-07-23 23:41:18,423 INFO L226 Difference]: Without dead ends: 257 [2018-07-23 23:41:18,424 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2842, Invalid=4814, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 23:41:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-07-23 23:41:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2018-07-23 23:41:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-07-23 23:41:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-07-23 23:41:18,492 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2018-07-23 23:41:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:18,492 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-07-23 23:41:18,492 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 23:41:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-07-23 23:41:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-07-23 23:41:18,493 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:18,493 INFO L353 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:18,493 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash 900780489, now seen corresponding path program 79 times [2018-07-23 23:41:18,494 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:18,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:18,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:18,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:18,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:20,511 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:20,511 INFO L221 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 [2018-07-23 23:41:20,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:20,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:20,698 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:20,698 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-07-23 23:41:20,699 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 23:41:20,699 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 23:41:20,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5333, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 23:41:20,700 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 85 states. [2018-07-23 23:41:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:23,151 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2018-07-23 23:41:23,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 23:41:23,151 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 249 [2018-07-23 23:41:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:23,152 INFO L225 Difference]: With dead ends: 421 [2018-07-23 23:41:23,152 INFO L226 Difference]: Without dead ends: 252 [2018-07-23 23:41:23,153 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3697, Invalid=12305, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 23:41:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-07-23 23:41:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-07-23 23:41:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-07-23 23:41:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-07-23 23:41:23,222 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2018-07-23 23:41:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:23,222 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-07-23 23:41:23,222 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 23:41:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-07-23 23:41:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-07-23 23:41:23,223 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:23,223 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:23,223 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1650767619, now seen corresponding path program 80 times [2018-07-23 23:41:23,223 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:23,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:23,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:23,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:23,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:24,089 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:24,089 INFO L221 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 [2018-07-23 23:41:24,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:24,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:24,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:24,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:24,309 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:24,309 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-07-23 23:41:24,310 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 23:41:24,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 23:41:24,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:41:24,310 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 47 states. [2018-07-23 23:41:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:25,517 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-07-23 23:41:25,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 23:41:25,517 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 251 [2018-07-23 23:41:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:25,518 INFO L225 Difference]: With dead ends: 265 [2018-07-23 23:41:25,518 INFO L226 Difference]: Without dead ends: 263 [2018-07-23 23:41:25,519 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2974, Invalid=5036, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 23:41:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-07-23 23:41:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2018-07-23 23:41:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-07-23 23:41:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2018-07-23 23:41:25,589 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 251 [2018-07-23 23:41:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:25,589 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2018-07-23 23:41:25,589 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 23:41:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2018-07-23 23:41:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-23 23:41:25,590 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:25,590 INFO L353 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:25,590 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:25,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1404976564, now seen corresponding path program 81 times [2018-07-23 23:41:25,591 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:25,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:25,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:25,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:25,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:27,974 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:27,974 INFO L221 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 [2018-07-23 23:41:27,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:28,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-07-23 23:41:28,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:28,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:28,228 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:28,228 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-07-23 23:41:28,229 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 23:41:28,229 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 23:41:28,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=5589, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 23:41:28,230 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand 87 states. [2018-07-23 23:41:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:30,294 INFO L93 Difference]: Finished difference Result 431 states and 433 transitions. [2018-07-23 23:41:30,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 23:41:30,294 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 255 [2018-07-23 23:41:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:30,295 INFO L225 Difference]: With dead ends: 431 [2018-07-23 23:41:30,295 INFO L226 Difference]: Without dead ends: 258 [2018-07-23 23:41:30,296 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3871, Invalid=12899, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 23:41:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-07-23 23:41:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-07-23 23:41:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-07-23 23:41:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-07-23 23:41:30,371 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 255 [2018-07-23 23:41:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:30,371 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-07-23 23:41:30,371 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 23:41:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-07-23 23:41:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-07-23 23:41:30,372 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:30,372 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:30,372 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash 903828486, now seen corresponding path program 82 times [2018-07-23 23:41:30,373 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:30,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:30,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:30,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:30,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:31,274 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:31,274 INFO L221 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 [2018-07-23 23:41:31,281 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:31,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:31,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:31,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:31,516 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:31,517 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-07-23 23:41:31,517 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 23:41:31,517 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 23:41:31,517 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:41:31,518 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 48 states. [2018-07-23 23:41:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:32,874 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2018-07-23 23:41:32,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 23:41:32,874 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 257 [2018-07-23 23:41:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:32,875 INFO L225 Difference]: With dead ends: 271 [2018-07-23 23:41:32,876 INFO L226 Difference]: Without dead ends: 269 [2018-07-23 23:41:32,876 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3109, Invalid=5263, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 23:41:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-07-23 23:41:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2018-07-23 23:41:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-07-23 23:41:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-07-23 23:41:32,952 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 257 [2018-07-23 23:41:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:32,952 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-07-23 23:41:32,952 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 23:41:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-07-23 23:41:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-07-23 23:41:32,953 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:32,954 INFO L353 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:32,954 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash -682613297, now seen corresponding path program 83 times [2018-07-23 23:41:32,954 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:32,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:32,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:32,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:32,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:35,247 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:35,247 INFO L221 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 [2018-07-23 23:41:35,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:35,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-07-23 23:41:35,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:35,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:35,519 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:35,519 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-07-23 23:41:35,519 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 23:41:35,520 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 23:41:35,520 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1981, Invalid=5851, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 23:41:35,521 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 89 states. [2018-07-23 23:41:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:38,707 INFO L93 Difference]: Finished difference Result 441 states and 443 transitions. [2018-07-23 23:41:38,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 23:41:38,707 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 261 [2018-07-23 23:41:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:38,708 INFO L225 Difference]: With dead ends: 441 [2018-07-23 23:41:38,708 INFO L226 Difference]: Without dead ends: 264 [2018-07-23 23:41:38,709 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4049, Invalid=13507, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 23:41:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-07-23 23:41:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2018-07-23 23:41:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-07-23 23:41:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2018-07-23 23:41:38,784 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 261 [2018-07-23 23:41:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:38,784 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2018-07-23 23:41:38,784 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 23:41:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2018-07-23 23:41:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-07-23 23:41:38,785 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:38,786 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:38,786 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:38,786 INFO L82 PathProgramCache]: Analyzing trace with hash -838597623, now seen corresponding path program 84 times [2018-07-23 23:41:38,786 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:38,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:38,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:38,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:38,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 1892 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:39,757 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:39,757 INFO L221 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 [2018-07-23 23:41:39,765 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:39,943 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-07-23 23:41:39,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:39,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 1892 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:40,068 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:40,068 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-07-23 23:41:40,068 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 23:41:40,069 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 23:41:40,069 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:41:40,069 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand 49 states. [2018-07-23 23:41:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:41,364 INFO L93 Difference]: Finished difference Result 277 states and 278 transitions. [2018-07-23 23:41:41,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 23:41:41,365 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 263 [2018-07-23 23:41:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:41,366 INFO L225 Difference]: With dead ends: 277 [2018-07-23 23:41:41,366 INFO L226 Difference]: Without dead ends: 275 [2018-07-23 23:41:41,367 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3247, Invalid=5495, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 23:41:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-07-23 23:41:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2018-07-23 23:41:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-07-23 23:41:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2018-07-23 23:41:41,463 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 263 [2018-07-23 23:41:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:41,463 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2018-07-23 23:41:41,463 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 23:41:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2018-07-23 23:41:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-07-23 23:41:41,464 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:41,464 INFO L353 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:41,464 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:41,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1841765458, now seen corresponding path program 85 times [2018-07-23 23:41:41,465 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:41,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:41,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:41,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:41,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5633 backedges. 3741 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:44,092 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:44,092 INFO L221 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 [2018-07-23 23:41:44,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:44,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5633 backedges. 3741 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:44,294 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:44,294 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-07-23 23:41:44,294 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 23:41:44,295 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 23:41:44,295 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=6119, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 23:41:44,295 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand 91 states. [2018-07-23 23:41:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:47,567 INFO L93 Difference]: Finished difference Result 451 states and 453 transitions. [2018-07-23 23:41:47,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 23:41:47,568 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 267 [2018-07-23 23:41:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:47,569 INFO L225 Difference]: With dead ends: 451 [2018-07-23 23:41:47,569 INFO L226 Difference]: Without dead ends: 270 [2018-07-23 23:41:47,569 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4231, Invalid=14129, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 23:41:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-07-23 23:41:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2018-07-23 23:41:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-07-23 23:41:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2018-07-23 23:41:47,650 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 267 [2018-07-23 23:41:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:47,651 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2018-07-23 23:41:47,651 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 23:41:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2018-07-23 23:41:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-07-23 23:41:47,652 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:47,652 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:47,652 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:47,652 INFO L82 PathProgramCache]: Analyzing trace with hash -171579636, now seen corresponding path program 86 times [2018-07-23 23:41:47,652 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:47,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:47,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:47,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:47,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5721 backedges. 1980 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:49,002 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:49,002 INFO L221 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 [2018-07-23 23:41:49,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:49,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:49,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:49,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5721 backedges. 1980 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:49,255 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:49,255 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-07-23 23:41:49,255 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 23:41:49,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 23:41:49,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:41:49,256 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand 50 states. [2018-07-23 23:41:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:50,613 INFO L93 Difference]: Finished difference Result 283 states and 284 transitions. [2018-07-23 23:41:50,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 23:41:50,613 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 269 [2018-07-23 23:41:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:50,614 INFO L225 Difference]: With dead ends: 283 [2018-07-23 23:41:50,614 INFO L226 Difference]: Without dead ends: 281 [2018-07-23 23:41:50,615 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3388, Invalid=5732, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 23:41:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-07-23 23:41:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2018-07-23 23:41:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-07-23 23:41:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2018-07-23 23:41:50,693 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 269 [2018-07-23 23:41:50,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:50,694 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2018-07-23 23:41:50,694 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 23:41:50,694 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2018-07-23 23:41:50,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-07-23 23:41:50,695 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:50,695 INFO L353 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:50,695 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:50,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1275708885, now seen corresponding path program 87 times [2018-07-23 23:41:50,695 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:50,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:50,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:50,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:50,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5896 backedges. 3916 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:53,068 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:53,068 INFO L221 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 [2018-07-23 23:41:53,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:53,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-07-23 23:41:53,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:53,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5896 backedges. 3916 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:53,350 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:53,350 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-07-23 23:41:53,350 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 23:41:53,351 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 23:41:53,351 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2163, Invalid=6393, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 23:41:53,351 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 93 states. [2018-07-23 23:41:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:56,911 INFO L93 Difference]: Finished difference Result 461 states and 463 transitions. [2018-07-23 23:41:56,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 23:41:56,911 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 273 [2018-07-23 23:41:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:56,912 INFO L225 Difference]: With dead ends: 461 [2018-07-23 23:41:56,912 INFO L226 Difference]: Without dead ends: 276 [2018-07-23 23:41:56,913 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4417, Invalid=14765, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 23:41:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-07-23 23:41:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2018-07-23 23:41:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-07-23 23:41:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2018-07-23 23:41:56,994 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 273 [2018-07-23 23:41:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:56,995 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2018-07-23 23:41:56,995 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 23:41:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2018-07-23 23:41:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-07-23 23:41:56,996 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:56,996 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:56,996 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2005933327, now seen corresponding path program 88 times [2018-07-23 23:41:56,996 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:56,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:56,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:56,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:56,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 2070 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:57,997 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:57,997 INFO L221 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 [2018-07-23 23:41:58,004 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:58,141 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:58,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:58,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 2070 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:58,302 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:58,303 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-07-23 23:41:58,303 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 23:41:58,303 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 23:41:58,303 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:41:58,304 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand 51 states. [2018-07-23 23:41:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:59,849 INFO L93 Difference]: Finished difference Result 289 states and 290 transitions. [2018-07-23 23:41:59,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 23:41:59,850 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 275 [2018-07-23 23:41:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:59,851 INFO L225 Difference]: With dead ends: 289 [2018-07-23 23:41:59,851 INFO L226 Difference]: Without dead ends: 287 [2018-07-23 23:41:59,852 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3532, Invalid=5974, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 23:41:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-07-23 23:41:59,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 280. [2018-07-23 23:41:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-07-23 23:41:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2018-07-23 23:41:59,934 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 275 [2018-07-23 23:41:59,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:59,934 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2018-07-23 23:41:59,934 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 23:41:59,934 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2018-07-23 23:41:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-07-23 23:41:59,935 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:59,935 INFO L353 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:59,936 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:59,936 INFO L82 PathProgramCache]: Analyzing trace with hash -772586920, now seen corresponding path program 89 times [2018-07-23 23:41:59,936 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:59,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:59,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:59,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:59,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6165 backedges. 4095 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:02,493 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:02,493 INFO L221 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 [2018-07-23 23:42:02,500 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:42:02,708 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-07-23 23:42:02,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:02,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6165 backedges. 4095 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:02,794 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:02,794 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-07-23 23:42:02,794 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 23:42:02,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 23:42:02,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2257, Invalid=6673, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 23:42:02,795 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 95 states. [2018-07-23 23:42:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:06,451 INFO L93 Difference]: Finished difference Result 471 states and 473 transitions. [2018-07-23 23:42:06,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 23:42:06,451 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 279 [2018-07-23 23:42:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:06,452 INFO L225 Difference]: With dead ends: 471 [2018-07-23 23:42:06,452 INFO L226 Difference]: Without dead ends: 282 [2018-07-23 23:42:06,454 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4607, Invalid=15415, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 23:42:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-07-23 23:42:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2018-07-23 23:42:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-07-23 23:42:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2018-07-23 23:42:06,539 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 279 [2018-07-23 23:42:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:06,539 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2018-07-23 23:42:06,539 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 23:42:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2018-07-23 23:42:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-07-23 23:42:06,540 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:06,540 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:06,540 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:06,540 INFO L82 PathProgramCache]: Analyzing trace with hash -79313390, now seen corresponding path program 90 times [2018-07-23 23:42:06,540 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:06,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:06,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:06,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:06,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6257 backedges. 2162 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:07,671 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:07,671 INFO L221 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 [2018-07-23 23:42:07,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:42:07,884 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-07-23 23:42:07,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:07,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6257 backedges. 2162 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:08,005 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:08,005 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-07-23 23:42:08,005 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 23:42:08,006 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 23:42:08,006 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:42:08,006 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 52 states. [2018-07-23 23:42:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:09,682 INFO L93 Difference]: Finished difference Result 295 states and 296 transitions. [2018-07-23 23:42:09,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 23:42:09,683 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 281 [2018-07-23 23:42:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:09,684 INFO L225 Difference]: With dead ends: 295 [2018-07-23 23:42:09,684 INFO L226 Difference]: Without dead ends: 293 [2018-07-23 23:42:09,685 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3679, Invalid=6221, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 23:42:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-07-23 23:42:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 286. [2018-07-23 23:42:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-07-23 23:42:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2018-07-23 23:42:09,806 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 281 [2018-07-23 23:42:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:09,806 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2018-07-23 23:42:09,806 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 23:42:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2018-07-23 23:42:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-07-23 23:42:09,807 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:09,807 INFO L353 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:09,807 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:09,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1059671589, now seen corresponding path program 91 times [2018-07-23 23:42:09,808 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:09,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:09,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:09,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:09,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 4278 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:12,397 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:12,397 INFO L221 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 [2018-07-23 23:42:12,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:12,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 4278 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:12,616 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:12,617 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-07-23 23:42:12,617 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 23:42:12,617 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 23:42:12,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=6959, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 23:42:12,618 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 97 states. [2018-07-23 23:42:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:16,567 INFO L93 Difference]: Finished difference Result 481 states and 483 transitions. [2018-07-23 23:42:16,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 23:42:16,567 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 285 [2018-07-23 23:42:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:16,568 INFO L225 Difference]: With dead ends: 481 [2018-07-23 23:42:16,568 INFO L226 Difference]: Without dead ends: 288 [2018-07-23 23:42:16,569 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3289 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4801, Invalid=16079, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 23:42:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-07-23 23:42:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2018-07-23 23:42:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-07-23 23:42:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2018-07-23 23:42:16,656 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 285 [2018-07-23 23:42:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:16,656 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2018-07-23 23:42:16,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 23:42:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2018-07-23 23:42:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-07-23 23:42:16,657 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:16,658 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:16,658 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:16,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1682047509, now seen corresponding path program 92 times [2018-07-23 23:42:16,658 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:16,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:16,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:16,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:16,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 2256 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:17,757 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:17,757 INFO L221 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 [2018-07-23 23:42:17,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:42:17,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:42:17,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:17,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 2256 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:18,062 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:18,062 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-07-23 23:42:18,062 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 23:42:18,063 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 23:42:18,063 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:42:18,063 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand 53 states. [2018-07-23 23:42:19,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:19,739 INFO L93 Difference]: Finished difference Result 301 states and 302 transitions. [2018-07-23 23:42:19,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 23:42:19,739 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 287 [2018-07-23 23:42:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:19,741 INFO L225 Difference]: With dead ends: 301 [2018-07-23 23:42:19,741 INFO L226 Difference]: Without dead ends: 299 [2018-07-23 23:42:19,742 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3829, Invalid=6473, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 23:42:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-07-23 23:42:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 292. [2018-07-23 23:42:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-07-23 23:42:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2018-07-23 23:42:19,835 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 287 [2018-07-23 23:42:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:19,835 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2018-07-23 23:42:19,835 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 23:42:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2018-07-23 23:42:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-07-23 23:42:19,836 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:19,836 INFO L353 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:19,836 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1719716770, now seen corresponding path program 93 times [2018-07-23 23:42:19,837 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:19,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:19,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:19,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:19,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 4465 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:22,624 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:22,624 INFO L221 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 [2018-07-23 23:42:22,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:42:22,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-07-23 23:42:22,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:22,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 4465 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:22,965 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:22,965 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-07-23 23:42:22,965 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 23:42:22,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 23:42:22,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2451, Invalid=7251, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 23:42:22,966 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand 99 states. [2018-07-23 23:42:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:27,061 INFO L93 Difference]: Finished difference Result 491 states and 493 transitions. [2018-07-23 23:42:27,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 23:42:27,061 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 291 [2018-07-23 23:42:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:27,062 INFO L225 Difference]: With dead ends: 491 [2018-07-23 23:42:27,062 INFO L226 Difference]: Without dead ends: 294 [2018-07-23 23:42:27,063 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4999, Invalid=16757, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 23:42:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-07-23 23:42:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2018-07-23 23:42:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-07-23 23:42:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 295 transitions. [2018-07-23 23:42:27,155 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 295 transitions. Word has length 291 [2018-07-23 23:42:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:27,155 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 295 transitions. [2018-07-23 23:42:27,155 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 23:42:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 295 transitions. [2018-07-23 23:42:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-07-23 23:42:27,156 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:27,156 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:27,156 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:27,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1353191144, now seen corresponding path program 94 times [2018-07-23 23:42:27,156 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:27,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:27,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:27,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:27,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 2352 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:28,313 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:28,313 INFO L221 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 [2018-07-23 23:42:28,320 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:42:28,456 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:42:28,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:28,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 2352 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:28,592 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:28,592 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-07-23 23:42:28,593 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 23:42:28,593 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 23:42:28,593 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 23:42:28,593 INFO L87 Difference]: Start difference. First operand 294 states and 295 transitions. Second operand 54 states. [2018-07-23 23:42:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:30,260 INFO L93 Difference]: Finished difference Result 307 states and 308 transitions. [2018-07-23 23:42:30,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 23:42:30,260 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 293 [2018-07-23 23:42:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:30,262 INFO L225 Difference]: With dead ends: 307 [2018-07-23 23:42:30,262 INFO L226 Difference]: Without dead ends: 305 [2018-07-23 23:42:30,262 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3982, Invalid=6730, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 23:42:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-07-23 23:42:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 298. [2018-07-23 23:42:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-07-23 23:42:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2018-07-23 23:42:30,358 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 293 [2018-07-23 23:42:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:30,359 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2018-07-23 23:42:30,359 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 23:42:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2018-07-23 23:42:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-07-23 23:42:30,360 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:30,360 INFO L353 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:30,360 INFO L414 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:30,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2049960417, now seen corresponding path program 95 times [2018-07-23 23:42:30,360 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:30,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:30,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:30,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:30,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7008 backedges. 4656 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:33,199 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:33,200 INFO L221 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 [2018-07-23 23:42:33,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:42:33,441 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-07-23 23:42:33,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:33,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7008 backedges. 4656 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:42:33,535 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:33,535 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-07-23 23:42:33,536 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 23:42:33,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 23:42:33,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2551, Invalid=7549, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 23:42:33,537 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand 101 states. Received shutdown request... [2018-07-23 23:42:36,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 23:42:36,204 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 23:42:36,209 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 23:42:36,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 11:42:36 BoogieIcfgContainer [2018-07-23 23:42:36,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 23:42:36,210 INFO L168 Benchmark]: Toolchain (without parser) took 235585.85 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 840.4 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -392.7 MB). Peak memory consumption was 447.8 MB. Max. memory is 7.1 GB. [2018-07-23 23:42:36,212 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:42:36,212 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 23:42:36,212 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.45 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:42:36,212 INFO L168 Benchmark]: Boogie Preprocessor took 21.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:42:36,213 INFO L168 Benchmark]: RCFGBuilder took 443.09 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 729.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -789.0 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-07-23 23:42:36,213 INFO L168 Benchmark]: TraceAbstraction took 234810.04 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 111.1 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 385.7 MB). Peak memory consumption was 496.9 MB. Max. memory is 7.1 GB. [2018-07-23 23:42:36,215 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.45 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 443.09 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 729.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -789.0 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234810.04 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 111.1 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 385.7 MB). Peak memory consumption was 496.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (298states) and interpolant automaton (currently 95 states, 101 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 145 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. TIMEOUT Result, 234.7s OverallTime, 98 OverallIterations, 49 TraceHistogramMax, 120.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4260 SDtfs, 9257 SDslu, 62839 SDs, 0 SdLazy, 66218 SolverSat, 5565 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22407 GetRequests, 16002 SyntacticMatches, 0 SemanticMatches, 6404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104007 ImplicationChecksByTransitivity, 148.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=97, 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: 3.5s AutomataMinimizationTime, 97 MinimizatonAttempts, 336 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 95.5s InterpolantComputationTime, 29574 NumberOfCodeBlocks, 29574 NumberOfCodeBlocksAsserted, 1400 NumberOfCheckSat, 29381 ConstructedInterpolants, 0 QuantifiedInterpolants, 17383283 SizeOfPredicates, 285 NumberOfNonLiveVariables, 41540 ConjunctsInSsa, 5176 ConjunctsInUnsatCore, 193 InterpolantComputations, 3 PerfectInterpolantSequences, 232846/456382 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/down_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-23_23-42-36-225.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_23-42-36-225.csv Completed graceful shutdown