java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 22:17:29,083 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 22:17:29,086 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 22:17:29,102 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 22:17:29,103 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 22:17:29,104 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 22:17:29,105 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 22:17:29,106 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 22:17:29,108 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 22:17:29,109 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 22:17:29,109 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 22:17:29,109 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 22:17:29,110 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 22:17:29,111 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 22:17:29,112 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 22:17:29,115 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 22:17:29,117 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 22:17:29,120 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 22:17:29,121 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 22:17:29,123 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 22:17:29,125 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 22:17:29,130 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 22:17:29,131 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 22:17:29,131 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-20 22:17:29,142 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 22:17:29,142 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 22:17:29,143 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 22:17:29,143 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 22:17:29,143 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 22:17:29,143 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 22:17:29,144 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 22:17:29,144 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 22:17:29,145 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 22:17:29,145 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 22:17:29,145 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 22:17:29,145 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 22:17:29,145 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 22:17:29,145 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 22:17:29,146 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 22:17:29,146 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 22:17:29,146 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 22:17:29,146 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 22:17:29,146 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 22:17:29,146 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 22:17:29,147 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 22:17:29,147 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 22:17:29,147 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 22:17:29,147 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 22:17:29,147 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 22:17:29,148 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:17:29,148 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 22:17:29,148 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 22:17:29,148 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 22:17:29,148 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 22:17:29,149 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 22:17:29,149 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 22:17:29,149 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 22:17:29,149 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 22:17:29,149 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 22:17:29,150 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 22:17:29,150 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 22:17:29,187 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 22:17:29,198 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 22:17:29,203 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 22:17:29,204 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 22:17:29,205 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 22:17:29,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c [2018-01-20 22:17:29,329 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 22:17:29,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 22:17:29,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 22:17:29,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 22:17:29,338 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 22:17:29,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:17:29" (1/1) ... [2018-01-20 22:17:29,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5530d006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29, skipping insertion in model container [2018-01-20 22:17:29,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:17:29" (1/1) ... [2018-01-20 22:17:29,358 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:17:29,378 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:17:29,490 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:17:29,505 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:17:29,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29 WrapperNode [2018-01-20 22:17:29,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 22:17:29,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 22:17:29,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 22:17:29,513 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 22:17:29,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29" (1/1) ... [2018-01-20 22:17:29,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29" (1/1) ... [2018-01-20 22:17:29,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29" (1/1) ... [2018-01-20 22:17:29,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29" (1/1) ... [2018-01-20 22:17:29,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29" (1/1) ... [2018-01-20 22:17:29,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29" (1/1) ... [2018-01-20 22:17:29,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29" (1/1) ... [2018-01-20 22:17:29,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 22:17:29,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 22:17:29,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 22:17:29,548 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 22:17:29,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29" (1/1) ... No working directory specified, using /storage/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 [2018-01-20 22:17:29,595 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 22:17:29,595 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 22:17:29,595 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-20 22:17:29,596 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 22:17:29,596 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 22:17:29,596 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 22:17:29,596 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 22:17:29,596 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 22:17:29,596 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 22:17:29,596 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-20 22:17:29,597 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 22:17:29,597 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 22:17:29,597 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 22:17:29,764 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 22:17:29,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:17:29 BoogieIcfgContainer [2018-01-20 22:17:29,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 22:17:29,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 22:17:29,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 22:17:29,802 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 22:17:29,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 10:17:29" (1/3) ... [2018-01-20 22:17:29,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322bcf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:17:29, skipping insertion in model container [2018-01-20 22:17:29,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:17:29" (2/3) ... [2018-01-20 22:17:29,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322bcf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:17:29, skipping insertion in model container [2018-01-20 22:17:29,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:17:29" (3/3) ... [2018-01-20 22:17:29,805 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c [2018-01-20 22:17:29,811 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 22:17:29,816 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 22:17:29,859 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:17:29,860 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:17:29,860 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:17:29,860 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:17:29,860 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:17:29,860 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:17:29,860 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:17:29,861 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 22:17:29,861 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:17:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 22:17:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 22:17:29,887 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:29,888 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 22:17:29,888 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 22:17:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-20 22:17:29,894 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:29,894 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:29,935 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:29,935 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:29,935 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:17:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:17:29,990 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 22:17:29,997 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:17:30,003 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:17:30,004 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:17:30,004 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:17:30,004 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:17:30,004 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:17:30,004 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:17:30,004 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:17:30,004 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-20 22:17:30,005 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:17:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 22:17:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-20 22:17:30,008 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:30,008 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:30,008 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-20 22:17:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash 352444009, now seen corresponding path program 1 times [2018-01-20 22:17:30,009 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:30,009 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:30,010 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:30,010 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:30,010 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:30,038 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:17:30,078 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:17:30,078 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:17:30,080 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:17:30,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:17:30,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:17:30,098 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-20 22:17:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:30,122 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-20 22:17:30,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:17:30,124 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-20 22:17:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:30,131 INFO L225 Difference]: With dead ends: 72 [2018-01-20 22:17:30,131 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 22:17:30,134 INFO L525 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 [2018-01-20 22:17:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 22:17:30,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 22:17:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 22:17:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 22:17:30,221 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-20 22:17:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:30,221 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 22:17:30,221 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:17:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 22:17:30,221 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 22:17:30,223 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:17:30,223 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:17:30,224 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:17:30,224 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:17:30,224 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:17:30,224 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:17:30,224 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:17:30,224 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 22:17:30,224 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:17:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 22:17:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 22:17:30,227 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:30,227 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:30,227 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1481761889, now seen corresponding path program 1 times [2018-01-20 22:17:30,228 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:30,228 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:30,229 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:30,229 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:30,229 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:30,237 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:17:30,252 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:17:30,252 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:17:30,252 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:17:30,252 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:17:30,252 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:17:30,253 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-20 22:17:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:30,258 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-20 22:17:30,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:17:30,258 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-20 22:17:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:30,260 INFO L225 Difference]: With dead ends: 72 [2018-01-20 22:17:30,260 INFO L226 Difference]: Without dead ends: 37 [2018-01-20 22:17:30,260 INFO L525 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 [2018-01-20 22:17:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-20 22:17:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-20 22:17:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-20 22:17:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-20 22:17:30,271 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2018-01-20 22:17:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:30,271 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-20 22:17:30,271 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:17:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-20 22:17:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 22:17:30,272 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:30,272 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:30,272 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:30,272 INFO L82 PathProgramCache]: Analyzing trace with hash 499012364, now seen corresponding path program 1 times [2018-01-20 22:17:30,272 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:30,273 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:30,273 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:30,273 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:30,274 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:30,282 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:17:30,317 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:17:30,317 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 22:17:30,319 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 22:17:30,319 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 22:17:30,319 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 22:17:30,319 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2018-01-20 22:17:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:30,381 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-20 22:17:30,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 22:17:30,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-20 22:17:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:30,385 INFO L225 Difference]: With dead ends: 66 [2018-01-20 22:17:30,385 INFO L226 Difference]: Without dead ends: 51 [2018-01-20 22:17:30,386 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 22:17:30,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-20 22:17:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-01-20 22:17:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-20 22:17:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-20 22:17:30,397 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 19 [2018-01-20 22:17:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:30,397 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-20 22:17:30,398 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 22:17:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-20 22:17:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-20 22:17:30,399 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:30,399 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:30,399 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:30,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1504830404, now seen corresponding path program 1 times [2018-01-20 22:17:30,400 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:30,400 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:30,401 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:30,401 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:30,401 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:30,423 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:17:30,560 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:30,560 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:30,571 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:30,597 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:17:30,698 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-20 22:17:30,698 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2018-01-20 22:17:30,698 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-20 22:17:30,699 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-20 22:17:30,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-01-20 22:17:30,699 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 11 states. [2018-01-20 22:17:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:31,047 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2018-01-20 22:17:31,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 22:17:31,047 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-01-20 22:17:31,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:31,048 INFO L225 Difference]: With dead ends: 90 [2018-01-20 22:17:31,049 INFO L226 Difference]: Without dead ends: 56 [2018-01-20 22:17:31,049 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-01-20 22:17:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-20 22:17:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2018-01-20 22:17:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-20 22:17:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-20 22:17:31,054 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 31 [2018-01-20 22:17:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:31,054 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-20 22:17:31,055 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-20 22:17:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-20 22:17:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-20 22:17:31,055 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:31,056 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:31,056 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:31,056 INFO L82 PathProgramCache]: Analyzing trace with hash -151955344, now seen corresponding path program 1 times [2018-01-20 22:17:31,056 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:31,056 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:31,057 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:31,057 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:31,057 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:31,070 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-20 22:17:31,123 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:31,123 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:31,135 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:31,159 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-20 22:17:31,196 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:31,196 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-01-20 22:17:31,196 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-20 22:17:31,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-20 22:17:31,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-20 22:17:31,197 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 5 states. [2018-01-20 22:17:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:31,236 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2018-01-20 22:17:31,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 22:17:31,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-20 22:17:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:31,238 INFO L225 Difference]: With dead ends: 84 [2018-01-20 22:17:31,238 INFO L226 Difference]: Without dead ends: 67 [2018-01-20 22:17:31,238 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-20 22:17:31,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-20 22:17:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 52. [2018-01-20 22:17:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-20 22:17:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-20 22:17:31,244 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 36 [2018-01-20 22:17:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:31,244 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-20 22:17:31,244 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-20 22:17:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-20 22:17:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-20 22:17:31,246 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:31,247 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:31,247 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1862415341, now seen corresponding path program 2 times [2018-01-20 22:17:31,247 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:31,247 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:31,248 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:31,249 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:31,249 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:31,266 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-01-20 22:17:31,331 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:31,332 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:31,345 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:17:31,359 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:31,375 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:31,376 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:31,379 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-20 22:17:31,458 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:31,458 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-01-20 22:17:31,459 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:17:31,459 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:17:31,459 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:17:31,460 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 10 states. [2018-01-20 22:17:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:31,728 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2018-01-20 22:17:31,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-20 22:17:31,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2018-01-20 22:17:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:31,732 INFO L225 Difference]: With dead ends: 148 [2018-01-20 22:17:31,732 INFO L226 Difference]: Without dead ends: 111 [2018-01-20 22:17:31,733 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-01-20 22:17:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-20 22:17:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2018-01-20 22:17:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-20 22:17:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2018-01-20 22:17:31,746 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 52 [2018-01-20 22:17:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:31,746 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2018-01-20 22:17:31,746 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:17:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2018-01-20 22:17:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-01-20 22:17:31,749 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:31,749 INFO L322 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:31,749 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:31,750 INFO L82 PathProgramCache]: Analyzing trace with hash 298957008, now seen corresponding path program 3 times [2018-01-20 22:17:31,750 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:31,750 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:31,751 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:31,751 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:31,751 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:31,776 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-20 22:17:31,878 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:31,878 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:31,886 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:17:31,896 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:31,899 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:31,903 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:31,909 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:31,911 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:31,915 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-01-20 22:17:31,969 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:31,969 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-01-20 22:17:31,970 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:17:31,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:17:31,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:17:31,970 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 10 states. [2018-01-20 22:17:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:32,176 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2018-01-20 22:17:32,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-20 22:17:32,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2018-01-20 22:17:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:32,180 INFO L225 Difference]: With dead ends: 194 [2018-01-20 22:17:32,180 INFO L226 Difference]: Without dead ends: 169 [2018-01-20 22:17:32,181 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-01-20 22:17:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-01-20 22:17:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 115. [2018-01-20 22:17:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-20 22:17:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2018-01-20 22:17:32,198 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 78 [2018-01-20 22:17:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:32,199 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2018-01-20 22:17:32,199 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:17:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2018-01-20 22:17:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-01-20 22:17:32,201 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:32,202 INFO L322 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:32,202 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:32,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1844537761, now seen corresponding path program 4 times [2018-01-20 22:17:32,202 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:32,202 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:32,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:32,203 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:32,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:32,235 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-20 22:17:32,345 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:32,345 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:32,356 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:17:32,396 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:32,403 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 173 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-01-20 22:17:32,579 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:32,580 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2018-01-20 22:17:32,580 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-20 22:17:32,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-20 22:17:32,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-01-20 22:17:32,581 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand 16 states. [2018-01-20 22:17:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:33,034 INFO L93 Difference]: Finished difference Result 311 states and 357 transitions. [2018-01-20 22:17:33,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-20 22:17:33,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2018-01-20 22:17:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:33,039 INFO L225 Difference]: With dead ends: 311 [2018-01-20 22:17:33,039 INFO L226 Difference]: Without dead ends: 241 [2018-01-20 22:17:33,040 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:17:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-01-20 22:17:33,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2018-01-20 22:17:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-20 22:17:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2018-01-20 22:17:33,062 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 109 [2018-01-20 22:17:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:33,063 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2018-01-20 22:17:33,063 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-20 22:17:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2018-01-20 22:17:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-01-20 22:17:33,066 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:33,066 INFO L322 BasicCegarLoop]: trace histogram [18, 13, 13, 13, 13, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:33,067 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:33,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1349347824, now seen corresponding path program 5 times [2018-01-20 22:17:33,067 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:33,067 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:33,068 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:33,068 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:33,068 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:33,100 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-01-20 22:17:33,237 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:33,237 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:33,249 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:17:33,268 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:33,270 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:33,272 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:33,275 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:33,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:33,302 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:33,304 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:33,316 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 392 proven. 49 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-01-20 22:17:33,444 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:33,445 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2018-01-20 22:17:33,445 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-20 22:17:33,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-20 22:17:33,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-01-20 22:17:33,446 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand 17 states. [2018-01-20 22:17:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:33,898 INFO L93 Difference]: Finished difference Result 336 states and 379 transitions. [2018-01-20 22:17:33,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-20 22:17:33,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 140 [2018-01-20 22:17:33,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:33,900 INFO L225 Difference]: With dead ends: 336 [2018-01-20 22:17:33,900 INFO L226 Difference]: Without dead ends: 197 [2018-01-20 22:17:33,902 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:17:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-01-20 22:17:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2018-01-20 22:17:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-01-20 22:17:33,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2018-01-20 22:17:33,916 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 140 [2018-01-20 22:17:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:33,916 INFO L432 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2018-01-20 22:17:33,917 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-20 22:17:33,917 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2018-01-20 22:17:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-01-20 22:17:33,919 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:33,919 INFO L322 BasicCegarLoop]: trace histogram [24, 18, 18, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:33,919 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1936414061, now seen corresponding path program 6 times [2018-01-20 22:17:33,920 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:33,920 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:33,921 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:33,921 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:33,921 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:33,946 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2018-01-20 22:17:34,088 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:34,088 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:34,094 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:17:34,110 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:34,113 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:34,116 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:34,118 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:34,122 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:34,126 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:34,131 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:34,136 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:34,142 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:34,144 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:34,149 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2018-01-20 22:17:34,231 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:34,232 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-20 22:17:34,232 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:17:34,232 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:17:34,232 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:17:34,233 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand 10 states. [2018-01-20 22:17:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:34,302 INFO L93 Difference]: Finished difference Result 237 states and 264 transitions. [2018-01-20 22:17:34,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-20 22:17:34,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 176 [2018-01-20 22:17:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:34,304 INFO L225 Difference]: With dead ends: 237 [2018-01-20 22:17:34,304 INFO L226 Difference]: Without dead ends: 200 [2018-01-20 22:17:34,304 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:17:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-01-20 22:17:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 160. [2018-01-20 22:17:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-01-20 22:17:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 177 transitions. [2018-01-20 22:17:34,316 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 177 transitions. Word has length 176 [2018-01-20 22:17:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:34,317 INFO L432 AbstractCegarLoop]: Abstraction has 160 states and 177 transitions. [2018-01-20 22:17:34,317 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:17:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 177 transitions. [2018-01-20 22:17:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-01-20 22:17:34,320 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:34,321 INFO L322 BasicCegarLoop]: trace histogram [29, 22, 22, 22, 22, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:34,321 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash -984621276, now seen corresponding path program 7 times [2018-01-20 22:17:34,321 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:34,321 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:34,322 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:34,322 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:34,322 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:34,354 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2018-01-20 22:17:34,569 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:34,569 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:34,574 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:34,636 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 1134 proven. 38 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2018-01-20 22:17:34,816 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:34,822 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2018-01-20 22:17:34,823 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-20 22:17:34,823 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-20 22:17:34,823 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2018-01-20 22:17:34,823 INFO L87 Difference]: Start difference. First operand 160 states and 177 transitions. Second operand 21 states. [2018-01-20 22:17:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:35,265 INFO L93 Difference]: Finished difference Result 392 states and 439 transitions. [2018-01-20 22:17:35,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-20 22:17:35,265 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 207 [2018-01-20 22:17:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:35,267 INFO L225 Difference]: With dead ends: 392 [2018-01-20 22:17:35,267 INFO L226 Difference]: Without dead ends: 305 [2018-01-20 22:17:35,268 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2018-01-20 22:17:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-01-20 22:17:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 200. [2018-01-20 22:17:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-01-20 22:17:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2018-01-20 22:17:35,283 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 207 [2018-01-20 22:17:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:35,283 INFO L432 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2018-01-20 22:17:35,283 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-20 22:17:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2018-01-20 22:17:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-01-20 22:17:35,287 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:35,287 INFO L322 BasicCegarLoop]: trace histogram [38, 30, 30, 30, 30, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:35,287 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash 446009255, now seen corresponding path program 8 times [2018-01-20 22:17:35,287 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:35,287 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:35,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:35,288 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:35,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:35,316 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2018-01-20 22:17:35,583 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:35,583 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:35,588 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:17:35,603 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:35,627 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:35,632 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:35,636 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 1895 proven. 60 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2018-01-20 22:17:35,915 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:35,915 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2018-01-20 22:17:35,915 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-20 22:17:35,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-20 22:17:35,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:17:35,916 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 24 states. [2018-01-20 22:17:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:36,397 INFO L93 Difference]: Finished difference Result 489 states and 547 transitions. [2018-01-20 22:17:36,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-20 22:17:36,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 258 [2018-01-20 22:17:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:36,400 INFO L225 Difference]: With dead ends: 489 [2018-01-20 22:17:36,400 INFO L226 Difference]: Without dead ends: 390 [2018-01-20 22:17:36,401 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:17:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2018-01-20 22:17:36,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 245. [2018-01-20 22:17:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-01-20 22:17:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 273 transitions. [2018-01-20 22:17:36,422 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 273 transitions. Word has length 258 [2018-01-20 22:17:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:36,422 INFO L432 AbstractCegarLoop]: Abstraction has 245 states and 273 transitions. [2018-01-20 22:17:36,422 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-20 22:17:36,422 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 273 transitions. [2018-01-20 22:17:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-01-20 22:17:36,424 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:36,425 INFO L322 BasicCegarLoop]: trace histogram [48, 39, 39, 39, 39, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:36,425 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1567268592, now seen corresponding path program 9 times [2018-01-20 22:17:36,425 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:36,425 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:36,426 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:36,426 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:36,426 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:36,465 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4821 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 4623 trivial. 0 not checked. [2018-01-20 22:17:36,764 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:36,764 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:36,769 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:17:36,791 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:36,794 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:36,798 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:36,802 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:36,808 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:36,813 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:36,818 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:36,824 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:36,825 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:36,832 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4821 backedges. 1226 proven. 87 refuted. 0 times theorem prover too weak. 3508 trivial. 0 not checked. [2018-01-20 22:17:36,999 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:36,999 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-01-20 22:17:37,000 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-20 22:17:37,000 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-20 22:17:37,000 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-01-20 22:17:37,000 INFO L87 Difference]: Start difference. First operand 245 states and 273 transitions. Second operand 20 states. [2018-01-20 22:17:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:37,355 INFO L93 Difference]: Finished difference Result 564 states and 641 transitions. [2018-01-20 22:17:37,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-20 22:17:37,356 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 314 [2018-01-20 22:17:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:37,360 INFO L225 Difference]: With dead ends: 564 [2018-01-20 22:17:37,360 INFO L226 Difference]: Without dead ends: 515 [2018-01-20 22:17:37,361 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:17:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-01-20 22:17:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 303. [2018-01-20 22:17:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-01-20 22:17:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 343 transitions. [2018-01-20 22:17:37,392 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 343 transitions. Word has length 314 [2018-01-20 22:17:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:37,393 INFO L432 AbstractCegarLoop]: Abstraction has 303 states and 343 transitions. [2018-01-20 22:17:37,393 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-20 22:17:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 343 transitions. [2018-01-20 22:17:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-01-20 22:17:37,396 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:37,396 INFO L322 BasicCegarLoop]: trace histogram [59, 49, 49, 49, 49, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:37,396 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:37,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1827967461, now seen corresponding path program 10 times [2018-01-20 22:17:37,397 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:37,397 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:37,397 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:37,397 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:37,398 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:37,446 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7375 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 7130 trivial. 0 not checked. [2018-01-20 22:17:37,772 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:37,772 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:37,777 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:17:37,838 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:37,845 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7375 backedges. 4311 proven. 119 refuted. 0 times theorem prover too weak. 2945 trivial. 0 not checked. [2018-01-20 22:17:38,115 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:38,115 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2018-01-20 22:17:38,115 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-20 22:17:38,116 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-20 22:17:38,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:17:38,116 INFO L87 Difference]: Start difference. First operand 303 states and 343 transitions. Second operand 30 states. [2018-01-20 22:17:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:39,119 INFO L93 Difference]: Finished difference Result 751 states and 858 transitions. [2018-01-20 22:17:39,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-20 22:17:39,119 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 375 [2018-01-20 22:17:39,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:39,123 INFO L225 Difference]: With dead ends: 751 [2018-01-20 22:17:39,123 INFO L226 Difference]: Without dead ends: 618 [2018-01-20 22:17:39,125 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2018-01-20 22:17:39,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2018-01-20 22:17:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 358. [2018-01-20 22:17:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-01-20 22:17:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 403 transitions. [2018-01-20 22:17:39,161 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 403 transitions. Word has length 375 [2018-01-20 22:17:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:39,162 INFO L432 AbstractCegarLoop]: Abstraction has 358 states and 403 transitions. [2018-01-20 22:17:39,162 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-20 22:17:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 403 transitions. [2018-01-20 22:17:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-01-20 22:17:39,166 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:39,166 INFO L322 BasicCegarLoop]: trace histogram [70, 59, 59, 59, 59, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:39,166 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:39,167 INFO L82 PathProgramCache]: Analyzing trace with hash -940109232, now seen corresponding path program 11 times [2018-01-20 22:17:39,167 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:39,167 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:39,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:39,168 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:39,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:39,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 10183 trivial. 0 not checked. [2018-01-20 22:17:39,622 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:39,622 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:39,627 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:17:39,652 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:39,657 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:39,662 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:39,667 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:39,673 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:39,679 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:39,686 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:39,692 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:39,693 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:39,699 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 6200 proven. 517 refuted. 0 times theorem prover too weak. 3763 trivial. 0 not checked. [2018-01-20 22:17:40,111 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:40,112 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 31 [2018-01-20 22:17:40,112 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-20 22:17:40,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-20 22:17:40,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2018-01-20 22:17:40,113 INFO L87 Difference]: Start difference. First operand 358 states and 403 transitions. Second operand 31 states. [2018-01-20 22:17:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:41,937 INFO L93 Difference]: Finished difference Result 835 states and 939 transitions. [2018-01-20 22:17:41,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-20 22:17:41,937 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 436 [2018-01-20 22:17:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:41,940 INFO L225 Difference]: With dead ends: 835 [2018-01-20 22:17:41,941 INFO L226 Difference]: Without dead ends: 469 [2018-01-20 22:17:41,943 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=514, Invalid=3026, Unknown=0, NotChecked=0, Total=3540 [2018-01-20 22:17:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2018-01-20 22:17:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 364. [2018-01-20 22:17:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-01-20 22:17:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 400 transitions. [2018-01-20 22:17:41,972 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 400 transitions. Word has length 436 [2018-01-20 22:17:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:41,973 INFO L432 AbstractCegarLoop]: Abstraction has 364 states and 400 transitions. [2018-01-20 22:17:41,973 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-20 22:17:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 400 transitions. [2018-01-20 22:17:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-01-20 22:17:41,977 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:41,977 INFO L322 BasicCegarLoop]: trace histogram [80, 68, 68, 68, 68, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:41,977 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash 270709555, now seen corresponding path program 12 times [2018-01-20 22:17:41,978 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:41,978 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:41,978 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:41,979 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:41,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:42,025 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13772 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 13418 trivial. 0 not checked. [2018-01-20 22:17:42,593 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:42,593 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:42,601 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:17:42,639 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,645 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,650 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,662 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,672 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,680 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,692 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,704 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,717 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,731 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,745 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,759 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,775 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,793 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,807 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,823 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,843 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,863 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:17:42,867 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:42,877 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13772 backedges. 2797 proven. 156 refuted. 0 times theorem prover too weak. 10819 trivial. 0 not checked. [2018-01-20 22:17:43,136 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:43,136 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2018-01-20 22:17:43,136 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-20 22:17:43,137 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-20 22:17:43,137 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:17:43,137 INFO L87 Difference]: Start difference. First operand 364 states and 400 transitions. Second operand 25 states. [2018-01-20 22:17:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:43,714 INFO L93 Difference]: Finished difference Result 742 states and 838 transitions. [2018-01-20 22:17:43,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-20 22:17:43,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 492 [2018-01-20 22:17:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:43,718 INFO L225 Difference]: With dead ends: 742 [2018-01-20 22:17:43,718 INFO L226 Difference]: Without dead ends: 681 [2018-01-20 22:17:43,719 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:17:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2018-01-20 22:17:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 432. [2018-01-20 22:17:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2018-01-20 22:17:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 481 transitions. [2018-01-20 22:17:43,747 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 481 transitions. Word has length 492 [2018-01-20 22:17:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:43,748 INFO L432 AbstractCegarLoop]: Abstraction has 432 states and 481 transitions. [2018-01-20 22:17:43,748 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-20 22:17:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 481 transitions. [2018-01-20 22:17:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2018-01-20 22:17:43,752 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:43,753 INFO L322 BasicCegarLoop]: trace histogram [94, 81, 81, 81, 81, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:43,753 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:43,753 INFO L82 PathProgramCache]: Analyzing trace with hash -388857372, now seen corresponding path program 13 times [2018-01-20 22:17:43,753 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:43,753 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:43,754 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:43,754 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:43,754 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:43,801 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19190 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 18774 trivial. 0 not checked. [2018-01-20 22:17:44,420 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:44,420 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:44,428 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:44,586 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 19190 backedges. 11045 proven. 198 refuted. 0 times theorem prover too weak. 7947 trivial. 0 not checked. [2018-01-20 22:17:45,157 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:45,158 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2018-01-20 22:17:45,159 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-20 22:17:45,159 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-20 22:17:45,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1079, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:17:45,160 INFO L87 Difference]: Start difference. First operand 432 states and 481 transitions. Second operand 37 states. [2018-01-20 22:17:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:46,746 INFO L93 Difference]: Finished difference Result 940 states and 1065 transitions. [2018-01-20 22:17:46,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-20 22:17:46,746 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 568 [2018-01-20 22:17:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:46,750 INFO L225 Difference]: With dead ends: 940 [2018-01-20 22:17:46,750 INFO L226 Difference]: Without dead ends: 780 [2018-01-20 22:17:46,752 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2018-01-20 22:17:46,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2018-01-20 22:17:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 497. [2018-01-20 22:17:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2018-01-20 22:17:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 550 transitions. [2018-01-20 22:17:46,779 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 550 transitions. Word has length 568 [2018-01-20 22:17:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:46,779 INFO L432 AbstractCegarLoop]: Abstraction has 497 states and 550 transitions. [2018-01-20 22:17:46,779 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-20 22:17:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 550 transitions. [2018-01-20 22:17:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2018-01-20 22:17:46,783 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:46,784 INFO L322 BasicCegarLoop]: trace histogram [108, 94, 94, 94, 94, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:46,784 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:46,784 INFO L82 PathProgramCache]: Analyzing trace with hash -272899373, now seen corresponding path program 14 times [2018-01-20 22:17:46,784 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:46,784 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:46,785 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:46,785 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:17:46,785 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:46,847 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25516 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 25033 trivial. 0 not checked. [2018-01-20 22:17:48,093 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:48,093 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:48,099 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:17:48,139 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:48,219 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:48,231 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:48,240 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25516 backedges. 14703 proven. 156 refuted. 0 times theorem prover too weak. 10657 trivial. 0 not checked. [2018-01-20 22:17:48,865 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:48,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2018-01-20 22:17:48,866 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-20 22:17:48,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-20 22:17:48,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 22:17:48,867 INFO L87 Difference]: Start difference. First operand 497 states and 550 transitions. Second operand 36 states. [2018-01-20 22:17:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:49,638 INFO L93 Difference]: Finished difference Result 891 states and 984 transitions. [2018-01-20 22:17:49,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-20 22:17:49,638 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 644 [2018-01-20 22:17:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:49,641 INFO L225 Difference]: With dead ends: 891 [2018-01-20 22:17:49,641 INFO L226 Difference]: Without dead ends: 719 [2018-01-20 22:17:49,643 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=607, Invalid=2815, Unknown=0, NotChecked=0, Total=3422 [2018-01-20 22:17:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-01-20 22:17:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 498. [2018-01-20 22:17:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-01-20 22:17:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 551 transitions. [2018-01-20 22:17:49,670 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 551 transitions. Word has length 644 [2018-01-20 22:17:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:49,671 INFO L432 AbstractCegarLoop]: Abstraction has 498 states and 551 transitions. [2018-01-20 22:17:49,671 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-20 22:17:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 551 transitions. [2018-01-20 22:17:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 711 [2018-01-20 22:17:49,675 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:49,675 INFO L322 BasicCegarLoop]: trace histogram [120, 105, 105, 105, 105, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:49,675 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1379701776, now seen corresponding path program 15 times [2018-01-20 22:17:49,676 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:49,676 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:49,676 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:49,677 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:49,677 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:49,726 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 31080 trivial. 0 not checked. [2018-01-20 22:17:50,544 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:50,544 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:50,550 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:17:50,600 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,604 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,609 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,615 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,623 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,630 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,639 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,646 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,657 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,664 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,673 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,684 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:17:50,686 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:50,700 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 5348 proven. 245 refuted. 0 times theorem prover too weak. 26042 trivial. 0 not checked. [2018-01-20 22:17:51,183 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:51,183 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2018-01-20 22:17:51,184 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-20 22:17:51,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-20 22:17:51,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:17:51,185 INFO L87 Difference]: Start difference. First operand 498 states and 551 transitions. Second operand 30 states. [2018-01-20 22:17:51,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:51,702 INFO L93 Difference]: Finished difference Result 1047 states and 1188 transitions. [2018-01-20 22:17:51,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-20 22:17:51,702 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 710 [2018-01-20 22:17:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:51,708 INFO L225 Difference]: With dead ends: 1047 [2018-01-20 22:17:51,708 INFO L226 Difference]: Without dead ends: 974 [2018-01-20 22:17:51,710 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=1254, Unknown=0, NotChecked=0, Total=1640 [2018-01-20 22:17:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2018-01-20 22:17:51,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 576. [2018-01-20 22:17:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2018-01-20 22:17:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 645 transitions. [2018-01-20 22:17:51,761 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 645 transitions. Word has length 710 [2018-01-20 22:17:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:51,762 INFO L432 AbstractCegarLoop]: Abstraction has 576 states and 645 transitions. [2018-01-20 22:17:51,762 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-20 22:17:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 645 transitions. [2018-01-20 22:17:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2018-01-20 22:17:51,770 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:51,770 INFO L322 BasicCegarLoop]: trace histogram [137, 121, 121, 121, 121, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:51,771 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:51,771 INFO L82 PathProgramCache]: Analyzing trace with hash -134932331, now seen corresponding path program 16 times [2018-01-20 22:17:51,771 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:51,771 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:51,772 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:51,772 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:51,772 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:51,846 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 41524 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 40892 trivial. 0 not checked. [2018-01-20 22:17:53,254 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:53,254 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:53,280 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:17:53,470 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:53,485 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 41524 backedges. 23545 proven. 297 refuted. 0 times theorem prover too weak. 17682 trivial. 0 not checked. [2018-01-20 22:17:54,313 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:54,314 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 44 [2018-01-20 22:17:54,315 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-20 22:17:54,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-20 22:17:54,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-01-20 22:17:54,316 INFO L87 Difference]: Start difference. First operand 576 states and 645 transitions. Second operand 44 states. [2018-01-20 22:17:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:55,627 INFO L93 Difference]: Finished difference Result 1273 states and 1444 transitions. [2018-01-20 22:17:55,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-01-20 22:17:55,627 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 801 [2018-01-20 22:17:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:55,630 INFO L225 Difference]: With dead ends: 1273 [2018-01-20 22:17:55,630 INFO L226 Difference]: Without dead ends: 1080 [2018-01-20 22:17:55,633 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=854, Invalid=4258, Unknown=0, NotChecked=0, Total=5112 [2018-01-20 22:17:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2018-01-20 22:17:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 651. [2018-01-20 22:17:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2018-01-20 22:17:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 725 transitions. [2018-01-20 22:17:55,689 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 725 transitions. Word has length 801 [2018-01-20 22:17:55,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:55,690 INFO L432 AbstractCegarLoop]: Abstraction has 651 states and 725 transitions. [2018-01-20 22:17:55,690 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-20 22:17:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 725 transitions. [2018-01-20 22:17:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2018-01-20 22:17:55,700 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:55,700 INFO L322 BasicCegarLoop]: trace histogram [154, 137, 137, 137, 137, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:55,700 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1235531344, now seen corresponding path program 17 times [2018-01-20 22:17:55,701 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:55,701 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:55,702 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:55,702 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:55,702 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:55,776 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:17:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 52768 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 52054 trivial. 0 not checked. [2018-01-20 22:17:57,005 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:17:57,005 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:17:57,010 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:17:57,046 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,048 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,049 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,051 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,054 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,055 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,057 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,058 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,061 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,063 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,065 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,070 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,075 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,082 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,090 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,100 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,114 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,127 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,142 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,159 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,176 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,196 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,216 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:17:57,218 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:17:57,231 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:17:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 52768 backedges. 29775 proven. 1348 refuted. 0 times theorem prover too weak. 21645 trivial. 0 not checked. [2018-01-20 22:17:58,135 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:17:58,135 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2018-01-20 22:17:58,136 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-01-20 22:17:58,136 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-01-20 22:17:58,137 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2018-01-20 22:17:58,137 INFO L87 Difference]: Start difference. First operand 651 states and 725 transitions. Second operand 45 states. [2018-01-20 22:17:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:17:59,566 INFO L93 Difference]: Finished difference Result 1537 states and 1710 transitions. [2018-01-20 22:17:59,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-01-20 22:17:59,567 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 892 [2018-01-20 22:17:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:17:59,570 INFO L225 Difference]: With dead ends: 1537 [2018-01-20 22:17:59,570 INFO L226 Difference]: Without dead ends: 923 [2018-01-20 22:17:59,575 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1113, Invalid=6543, Unknown=0, NotChecked=0, Total=7656 [2018-01-20 22:17:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2018-01-20 22:17:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 647. [2018-01-20 22:17:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2018-01-20 22:17:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 719 transitions. [2018-01-20 22:17:59,632 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 719 transitions. Word has length 892 [2018-01-20 22:17:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:17:59,633 INFO L432 AbstractCegarLoop]: Abstraction has 647 states and 719 transitions. [2018-01-20 22:17:59,633 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-01-20 22:17:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 719 transitions. [2018-01-20 22:17:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2018-01-20 22:17:59,643 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:17:59,644 INFO L322 BasicCegarLoop]: trace histogram [168, 150, 150, 150, 150, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:17:59,644 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:17:59,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1077084973, now seen corresponding path program 18 times [2018-01-20 22:17:59,644 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:17:59,645 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:17:59,645 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:59,645 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:17:59,646 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:17:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:17:59,727 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:18:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 62994 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 62193 trivial. 0 not checked. [2018-01-20 22:18:01,215 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:18:01,216 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:18:01,223 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:18:01,275 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,278 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,297 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,307 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,317 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,321 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,330 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,338 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,349 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,358 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,368 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,374 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,391 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,405 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,414 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,428 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,440 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,461 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,471 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,489 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,500 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,516 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,538 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,557 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,579 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,613 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:18:01,616 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:18:01,629 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:18:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 62994 backedges. 9119 proven. 354 refuted. 0 times theorem prover too weak. 53521 trivial. 0 not checked. [2018-01-20 22:18:02,268 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:18:02,268 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2018-01-20 22:18:02,269 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-20 22:18:02,269 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-20 22:18:02,270 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2018-01-20 22:18:02,270 INFO L87 Difference]: Start difference. First operand 647 states and 719 transitions. Second operand 35 states. [2018-01-20 22:18:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:18:02,926 INFO L93 Difference]: Finished difference Result 1401 states and 1595 transitions. [2018-01-20 22:18:02,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-20 22:18:02,926 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 968 [2018-01-20 22:18:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:18:02,931 INFO L225 Difference]: With dead ends: 1401 [2018-01-20 22:18:02,931 INFO L226 Difference]: Without dead ends: 1316 [2018-01-20 22:18:02,932 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 955 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1732, Unknown=0, NotChecked=0, Total=2256 [2018-01-20 22:18:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2018-01-20 22:18:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 735. [2018-01-20 22:18:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-01-20 22:18:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 826 transitions. [2018-01-20 22:18:02,998 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 826 transitions. Word has length 968 [2018-01-20 22:18:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:18:02,999 INFO L432 AbstractCegarLoop]: Abstraction has 735 states and 826 transitions. [2018-01-20 22:18:02,999 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-20 22:18:02,999 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 826 transitions. [2018-01-20 22:18:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1075 [2018-01-20 22:18:03,011 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:18:03,012 INFO L322 BasicCegarLoop]: trace histogram [188, 169, 169, 169, 169, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:18:03,012 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:18:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash 758470174, now seen corresponding path program 19 times [2018-01-20 22:18:03,012 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:18:03,012 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:18:03,013 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:18:03,013 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:18:03,013 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:18:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:18:03,098 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:18:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 79321 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 78428 trivial. 0 not checked. [2018-01-20 22:18:04,808 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:18:04,808 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-20 22:18:04,813 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:18:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:18:05,001 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:18:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 79321 backedges. 44403 proven. 416 refuted. 0 times theorem prover too weak. 34502 trivial. 0 not checked. [2018-01-20 22:18:05,946 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:18:05,947 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 51 [2018-01-20 22:18:05,948 INFO L409 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-01-20 22:18:05,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-01-20 22:18:05,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=2078, Unknown=0, NotChecked=0, Total=2550 [2018-01-20 22:18:05,948 INFO L87 Difference]: Start difference. First operand 735 states and 826 transitions. Second operand 51 states. [2018-01-20 22:18:07,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:18:07,139 INFO L93 Difference]: Finished difference Result 1650 states and 1873 transitions. [2018-01-20 22:18:07,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-01-20 22:18:07,139 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 1074 [2018-01-20 22:18:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:18:07,146 INFO L225 Difference]: With dead ends: 1650 [2018-01-20 22:18:07,146 INFO L226 Difference]: Without dead ends: 1424 [2018-01-20 22:18:07,150 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1147, Invalid=5825, Unknown=0, NotChecked=0, Total=6972 [2018-01-20 22:18:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2018-01-20 22:18:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 820. [2018-01-20 22:18:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-01-20 22:18:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 917 transitions. [2018-01-20 22:18:07,222 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 917 transitions. Word has length 1074 [2018-01-20 22:18:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:18:07,223 INFO L432 AbstractCegarLoop]: Abstraction has 820 states and 917 transitions. [2018-01-20 22:18:07,223 INFO L433 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-01-20 22:18:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 917 transitions. [2018-01-20 22:18:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1181 [2018-01-20 22:18:07,237 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:18:07,237 INFO L322 BasicCegarLoop]: trace histogram [208, 188, 188, 188, 188, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:18:07,238 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:18:07,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2082254899, now seen corresponding path program 20 times [2018-01-20 22:18:07,238 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:18:07,238 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:18:07,239 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:18:07,239 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:18:07,239 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:18:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:18:07,322 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-01-20 22:18:08,029 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:264) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:262) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:131) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:200) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:915) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:279) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackTraceAbstractionRefinementStrategy.getTraceCheck(MultiTrackTraceAbstractionRefinementStrategy.java:218) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:205) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:381) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:157) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:113) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:117) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-01-20 22:18:08,032 INFO L168 Benchmark]: Toolchain (without parser) took 38701.80 ms. Allocated memory was 299.4 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 258.7 MB in the beginning and 645.7 MB in the end (delta: -387.0 MB). Peak memory consumption was 1.8 GB. Max. memory is 5.3 GB. [2018-01-20 22:18:08,033 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 299.4 MB. Free memory is still 263.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 22:18:08,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.59 ms. Allocated memory is still 299.4 MB. Free memory was 257.7 MB in the beginning and 249.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. [2018-01-20 22:18:08,033 INFO L168 Benchmark]: Boogie Preprocessor took 35.34 ms. Allocated memory is still 299.4 MB. Free memory was 249.6 MB in the beginning and 247.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:18:08,034 INFO L168 Benchmark]: RCFGBuilder took 251.75 ms. Allocated memory is still 299.4 MB. Free memory was 247.6 MB in the beginning and 233.0 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 5.3 GB. [2018-01-20 22:18:08,034 INFO L168 Benchmark]: TraceAbstraction took 38230.86 ms. Allocated memory was 299.4 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 233.0 MB in the beginning and 645.7 MB in the end (delta: -412.7 MB). Peak memory consumption was 1.8 GB. Max. memory is 5.3 GB. [2018-01-20 22:18:08,036 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 299.4 MB. Free memory is still 263.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 178.59 ms. Allocated memory is still 299.4 MB. Free memory was 257.7 MB in the beginning and 249.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 35.34 ms. Allocated memory is still 299.4 MB. Free memory was 249.6 MB in the beginning and 247.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 251.75 ms. Allocated memory is still 299.4 MB. Free memory was 247.6 MB in the beginning and 233.0 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 38230.86 ms. Allocated memory was 299.4 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 233.0 MB in the beginning and 645.7 MB in the end (delta: -412.7 MB). Peak memory consumption was 1.8 GB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, 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, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 14]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, 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, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:264) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_22-18-08-044.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_22-18-08-044.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_22-18-08-044.csv Completed graceful shutdown