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/ArraysOfVariableLength_false-valid-deref-write.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 22:12:17,610 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 22:12:17,612 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 22:12:17,628 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 22:12:17,628 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 22:12:17,629 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 22:12:17,630 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 22:12:17,632 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 22:12:17,634 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 22:12:17,635 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 22:12:17,636 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 22:12:17,637 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 22:12:17,638 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 22:12:17,639 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 22:12:17,641 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 22:12:17,643 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 22:12:17,646 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 22:12:17,648 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 22:12:17,650 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 22:12:17,651 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 22:12:17,654 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 22:12:17,660 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 22:12:17,660 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 22:12:17,661 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 22:12:17,670 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 22:12:17,670 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 22:12:17,671 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 22:12:17,671 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 22:12:17,671 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 22:12:17,672 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 22:12:17,672 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 22:12:17,672 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 22:12:17,672 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 22:12:17,672 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 22:12:17,673 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 22:12:17,673 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 22:12:17,673 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 22:12:17,673 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 22:12:17,673 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 22:12:17,673 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 22:12:17,673 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 22:12:17,674 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 22:12:17,674 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 22:12:17,674 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 22:12:17,674 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 22:12:17,674 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 22:12:17,674 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 22:12:17,675 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 22:12:17,675 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 22:12:17,675 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:12:17,675 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 22:12:17,675 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 22:12:17,676 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 22:12:17,676 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 22:12:17,676 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 22:12:17,676 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 22:12:17,676 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 22:12:17,676 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 22:12:17,676 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 22:12:17,677 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 22:12:17,677 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 22:12:17,711 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 22:12:17,722 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 22:12:17,725 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 22:12:17,726 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 22:12:17,726 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 22:12:17,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_false-valid-deref-write.c [2018-01-20 22:12:17,840 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 22:12:17,845 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 22:12:17,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 22:12:17,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 22:12:17,851 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 22:12:17,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:12:17" (1/1) ... [2018-01-20 22:12:17,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b0bc597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:17, skipping insertion in model container [2018-01-20 22:12:17,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:12:17" (1/1) ... [2018-01-20 22:12:17,868 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:12:17,883 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:12:17,995 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:12:18,012 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:12:18,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18 WrapperNode [2018-01-20 22:12:18,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 22:12:18,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 22:12:18,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 22:12:18,020 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 22:12:18,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18" (1/1) ... [2018-01-20 22:12:18,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18" (1/1) ... [2018-01-20 22:12:18,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18" (1/1) ... [2018-01-20 22:12:18,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18" (1/1) ... [2018-01-20 22:12:18,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18" (1/1) ... [2018-01-20 22:12:18,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18" (1/1) ... [2018-01-20 22:12:18,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18" (1/1) ... [2018-01-20 22:12:18,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 22:12:18,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 22:12:18,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 22:12:18,052 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 22:12:18,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18" (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 22:12:18,101 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 22:12:18,101 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 22:12:18,101 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-20 22:12:18,101 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 22:12:18,101 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 22:12:18,101 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 22:12:18,102 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 22:12:18,102 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 22:12:18,102 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 22:12:18,102 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-20 22:12:18,102 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 22:12:18,102 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 22:12:18,102 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 22:12:18,285 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 22:12:18,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:12:18 BoogieIcfgContainer [2018-01-20 22:12:18,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 22:12:18,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 22:12:18,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 22:12:18,288 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 22:12:18,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 10:12:17" (1/3) ... [2018-01-20 22:12:18,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385173fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:12:18, skipping insertion in model container [2018-01-20 22:12:18,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:12:18" (2/3) ... [2018-01-20 22:12:18,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385173fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:12:18, skipping insertion in model container [2018-01-20 22:12:18,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:12:18" (3/3) ... [2018-01-20 22:12:18,292 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_false-valid-deref-write.c [2018-01-20 22:12:18,299 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 22:12:18,305 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 22:12:18,346 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:12:18,346 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:12:18,347 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:12:18,347 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:12:18,347 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:12:18,347 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:12:18,347 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:12:18,348 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 22:12:18,348 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:12:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-01-20 22:12:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 22:12:18,371 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:18,372 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 22:12:18,372 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 22:12:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash 103790, now seen corresponding path program 1 times [2018-01-20 22:12:18,381 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:18,382 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:18,430 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,431 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:18,431 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:12:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:12:18,495 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 22:12:18,502 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:12:18,508 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:12:18,508 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:12:18,509 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:12:18,509 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:12:18,509 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:12:18,509 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:12:18,509 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:12:18,509 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-20 22:12:18,509 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:12:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-01-20 22:12:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-20 22:12:18,512 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:18,512 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:12:18,512 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-20 22:12:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash -125735921, now seen corresponding path program 1 times [2018-01-20 22:12:18,513 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:18,513 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:18,514 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,514 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:18,514 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:18,545 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:18,587 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 22:12:18,590 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:12:18,590 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:12:18,592 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:12:18,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:12:18,604 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:12:18,606 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2018-01-20 22:12:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:18,635 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-01-20 22:12:18,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:12:18,636 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-20 22:12:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:18,643 INFO L225 Difference]: With dead ends: 78 [2018-01-20 22:12:18,644 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 22:12:18,648 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 22:12:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 22:12:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 22:12:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 22:12:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 22:12:18,748 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-20 22:12:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:18,749 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 22:12:18,749 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:12:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 22:12:18,749 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 22:12:18,752 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:12:18,753 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:12:18,753 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:12:18,753 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:12:18,753 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:12:18,753 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:12:18,753 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:12:18,754 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 22:12:18,754 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:12:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-01-20 22:12:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 22:12:18,757 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:18,758 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 22:12:18,758 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1491711838, now seen corresponding path program 1 times [2018-01-20 22:12:18,758 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:18,758 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:18,760 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,760 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:18,760 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:18,770 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:18,781 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 22:12:18,781 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:12:18,781 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:12:18,781 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:12:18,782 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:12:18,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:12:18,782 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2018-01-20 22:12:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:18,787 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-01-20 22:12:18,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:12:18,788 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-20 22:12:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:18,790 INFO L225 Difference]: With dead ends: 78 [2018-01-20 22:12:18,790 INFO L226 Difference]: Without dead ends: 40 [2018-01-20 22:12:18,791 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 22:12:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-20 22:12:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-20 22:12:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-20 22:12:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-01-20 22:12:18,802 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 17 [2018-01-20 22:12:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:18,803 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-01-20 22:12:18,803 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:12:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-01-20 22:12:18,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 22:12:18,804 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:18,804 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 22:12:18,804 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:18,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1603848178, now seen corresponding path program 1 times [2018-01-20 22:12:18,804 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:18,804 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:18,805 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,805 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:18,805 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:18,818 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:18,859 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 22:12:18,859 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:12:18,859 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 22:12:18,861 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 22:12:18,861 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 22:12:18,862 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 22:12:18,862 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 3 states. [2018-01-20 22:12:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:18,934 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2018-01-20 22:12:18,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 22:12:18,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-20 22:12:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:18,939 INFO L225 Difference]: With dead ends: 73 [2018-01-20 22:12:18,939 INFO L226 Difference]: Without dead ends: 57 [2018-01-20 22:12:18,941 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 22:12:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-20 22:12:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-01-20 22:12:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-20 22:12:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-01-20 22:12:18,953 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 19 [2018-01-20 22:12:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:18,954 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-01-20 22:12:18,954 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 22:12:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-01-20 22:12:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-20 22:12:18,955 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:18,956 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, 1, 1, 1] [2018-01-20 22:12:18,956 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:18,956 INFO L82 PathProgramCache]: Analyzing trace with hash -428436962, now seen corresponding path program 1 times [2018-01-20 22:12:18,956 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:18,956 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:18,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,957 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:18,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:18,976 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:19,063 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 22:12:19,063 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:19,063 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 22:12:19,072 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:19,108 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:19,184 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 22:12:19,205 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-20 22:12:19,205 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2018-01-20 22:12:19,206 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-20 22:12:19,206 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-20 22:12:19,206 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:12:19,207 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 7 states. [2018-01-20 22:12:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:19,420 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2018-01-20 22:12:19,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 22:12:19,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2018-01-20 22:12:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:19,423 INFO L225 Difference]: With dead ends: 116 [2018-01-20 22:12:19,423 INFO L226 Difference]: Without dead ends: 79 [2018-01-20 22:12:19,424 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:12:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-20 22:12:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2018-01-20 22:12:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-20 22:12:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-01-20 22:12:19,434 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 34 [2018-01-20 22:12:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:19,434 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-01-20 22:12:19,434 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-20 22:12:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-01-20 22:12:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-20 22:12:19,437 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:19,438 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 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, 1] [2018-01-20 22:12:19,438 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:19,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1575876768, now seen corresponding path program 1 times [2018-01-20 22:12:19,438 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:19,438 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:19,440 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:19,440 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:19,440 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:19,470 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-01-20 22:12:19,545 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:19,545 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 22:12:19,555 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:19,593 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-20 22:12:19,666 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:19,666 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-01-20 22:12:19,666 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:12:19,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:12:19,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:12:19,667 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 10 states. [2018-01-20 22:12:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:20,025 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2018-01-20 22:12:20,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-20 22:12:20,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2018-01-20 22:12:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:20,028 INFO L225 Difference]: With dead ends: 164 [2018-01-20 22:12:20,028 INFO L226 Difference]: Without dead ends: 123 [2018-01-20 22:12:20,029 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 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 22:12:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-20 22:12:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 86. [2018-01-20 22:12:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-20 22:12:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2018-01-20 22:12:20,041 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 57 [2018-01-20 22:12:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:20,042 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2018-01-20 22:12:20,042 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:12:20,042 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2018-01-20 22:12:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-01-20 22:12:20,044 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:20,044 INFO L322 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 4, 3, 3, 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, 1] [2018-01-20 22:12:20,044 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1577101506, now seen corresponding path program 2 times [2018-01-20 22:12:20,045 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:20,045 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:20,046 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:20,046 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:20,046 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:20,081 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-20 22:12:20,187 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:20,187 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 22:12:20,193 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:12:20,209 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:20,226 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:20,231 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:20,236 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-20 22:12:20,374 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:20,374 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2018-01-20 22:12:20,374 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-20 22:12:20,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-20 22:12:20,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-01-20 22:12:20,375 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 13 states. [2018-01-20 22:12:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:20,708 INFO L93 Difference]: Finished difference Result 234 states and 261 transitions. [2018-01-20 22:12:20,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 22:12:20,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2018-01-20 22:12:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:20,710 INFO L225 Difference]: With dead ends: 234 [2018-01-20 22:12:20,711 INFO L226 Difference]: Without dead ends: 180 [2018-01-20 22:12:20,711 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:12:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-01-20 22:12:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2018-01-20 22:12:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-20 22:12:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2018-01-20 22:12:20,723 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 85 [2018-01-20 22:12:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:20,723 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2018-01-20 22:12:20,723 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-20 22:12:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2018-01-20 22:12:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-01-20 22:12:20,725 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:20,725 INFO L322 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 5, 4, 4, 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, 1] [2018-01-20 22:12:20,725 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:20,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1501628352, now seen corresponding path program 3 times [2018-01-20 22:12:20,726 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:20,726 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:20,726 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:20,727 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:20,727 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:20,762 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-20 22:12:20,876 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:20,876 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 22:12:20,883 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:12:20,898 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:20,908 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:20,925 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:20,933 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:20,942 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:20,944 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:20,951 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 155 proven. 21 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-01-20 22:12:21,100 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:21,100 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2018-01-20 22:12:21,101 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-20 22:12:21,101 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-20 22:12:21,101 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:12:21,101 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 12 states. [2018-01-20 22:12:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:21,293 INFO L93 Difference]: Finished difference Result 289 states and 324 transitions. [2018-01-20 22:12:21,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-20 22:12:21,294 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 118 [2018-01-20 22:12:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:21,298 INFO L225 Difference]: With dead ends: 289 [2018-01-20 22:12:21,298 INFO L226 Difference]: Without dead ends: 256 [2018-01-20 22:12:21,299 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-01-20 22:12:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-01-20 22:12:21,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2018-01-20 22:12:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-01-20 22:12:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 185 transitions. [2018-01-20 22:12:21,321 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 185 transitions. Word has length 118 [2018-01-20 22:12:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:21,321 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 185 transitions. [2018-01-20 22:12:21,322 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-20 22:12:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 185 transitions. [2018-01-20 22:12:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-01-20 22:12:21,325 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:21,325 INFO L322 BasicCegarLoop]: trace histogram [19, 14, 14, 14, 14, 6, 5, 5, 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, 1] [2018-01-20 22:12:21,326 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash -405146722, now seen corresponding path program 4 times [2018-01-20 22:12:21,326 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:21,326 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:21,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:21,327 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:21,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:21,362 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2018-01-20 22:12:21,510 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:21,510 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 22:12:21,516 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:12:21,551 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:21,557 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 352 proven. 38 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-01-20 22:12:21,707 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:21,708 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 19 [2018-01-20 22:12:21,708 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-20 22:12:21,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-20 22:12:21,708 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:12:21,709 INFO L87 Difference]: Start difference. First operand 165 states and 185 transitions. Second operand 19 states. [2018-01-20 22:12:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:22,123 INFO L93 Difference]: Finished difference Result 439 states and 496 transitions. [2018-01-20 22:12:22,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-20 22:12:22,123 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 156 [2018-01-20 22:12:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:22,125 INFO L225 Difference]: With dead ends: 439 [2018-01-20 22:12:22,125 INFO L226 Difference]: Without dead ends: 346 [2018-01-20 22:12:22,126 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2018-01-20 22:12:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-01-20 22:12:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 208. [2018-01-20 22:12:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-01-20 22:12:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 233 transitions. [2018-01-20 22:12:22,143 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 233 transitions. Word has length 156 [2018-01-20 22:12:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:22,144 INFO L432 AbstractCegarLoop]: Abstraction has 208 states and 233 transitions. [2018-01-20 22:12:22,144 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-20 22:12:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 233 transitions. [2018-01-20 22:12:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-01-20 22:12:22,147 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:22,147 INFO L322 BasicCegarLoop]: trace histogram [25, 19, 19, 19, 19, 7, 6, 6, 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, 1] [2018-01-20 22:12:22,147 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:22,148 INFO L82 PathProgramCache]: Analyzing trace with hash 894023172, now seen corresponding path program 5 times [2018-01-20 22:12:22,148 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:22,148 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:22,149 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:22,149 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:22,149 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:22,188 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1173 trivial. 0 not checked. [2018-01-20 22:12:22,450 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:22,451 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 22:12:22,458 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:12:22,475 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:22,480 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:22,484 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:22,488 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:22,491 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:22,495 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:22,501 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:22,509 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:22,518 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:22,520 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:22,525 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 822 proven. 118 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-01-20 22:12:22,682 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:22,682 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2018-01-20 22:12:22,682 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-20 22:12:22,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-20 22:12:22,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2018-01-20 22:12:22,683 INFO L87 Difference]: Start difference. First operand 208 states and 233 transitions. Second operand 20 states. [2018-01-20 22:12:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:23,443 INFO L93 Difference]: Finished difference Result 479 states and 536 transitions. [2018-01-20 22:12:23,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-20 22:12:23,443 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 194 [2018-01-20 22:12:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:23,445 INFO L225 Difference]: With dead ends: 479 [2018-01-20 22:12:23,445 INFO L226 Difference]: Without dead ends: 274 [2018-01-20 22:12:23,446 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:12:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-01-20 22:12:23,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 212. [2018-01-20 22:12:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-01-20 22:12:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 232 transitions. [2018-01-20 22:12:23,461 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 232 transitions. Word has length 194 [2018-01-20 22:12:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:23,462 INFO L432 AbstractCegarLoop]: Abstraction has 212 states and 232 transitions. [2018-01-20 22:12:23,462 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-20 22:12:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 232 transitions. [2018-01-20 22:12:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-01-20 22:12:23,465 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:23,465 INFO L322 BasicCegarLoop]: trace histogram [32, 25, 25, 25, 25, 8, 7, 7, 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, 1] [2018-01-20 22:12:23,465 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1111921858, now seen corresponding path program 6 times [2018-01-20 22:12:23,466 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:23,466 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:23,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:23,467 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:23,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:23,506 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2137 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1976 trivial. 0 not checked. [2018-01-20 22:12:23,753 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:23,753 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 22:12:23,763 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:12:23,787 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,791 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,796 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,799 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,805 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,812 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,821 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,830 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,852 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,865 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,867 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:23,874 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2137 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1976 trivial. 0 not checked. [2018-01-20 22:12:23,965 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:23,965 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-20 22:12:23,966 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-20 22:12:23,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-20 22:12:23,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-20 22:12:23,966 INFO L87 Difference]: Start difference. First operand 212 states and 232 transitions. Second operand 11 states. [2018-01-20 22:12:24,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:24,128 INFO L93 Difference]: Finished difference Result 320 states and 353 transitions. [2018-01-20 22:12:24,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 22:12:24,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 237 [2018-01-20 22:12:24,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:24,131 INFO L225 Difference]: With dead ends: 320 [2018-01-20 22:12:24,132 INFO L226 Difference]: Without dead ends: 272 [2018-01-20 22:12:24,132 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-20 22:12:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-01-20 22:12:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 224. [2018-01-20 22:12:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-01-20 22:12:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 246 transitions. [2018-01-20 22:12:24,151 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 246 transitions. Word has length 237 [2018-01-20 22:12:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:24,152 INFO L432 AbstractCegarLoop]: Abstraction has 224 states and 246 transitions. [2018-01-20 22:12:24,152 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-20 22:12:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 246 transitions. [2018-01-20 22:12:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-01-20 22:12:24,154 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:24,154 INFO L322 BasicCegarLoop]: trace histogram [38, 30, 30, 30, 30, 9, 8, 8, 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, 1] [2018-01-20 22:12:24,154 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:24,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1579608284, now seen corresponding path program 7 times [2018-01-20 22:12:24,154 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:24,154 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:24,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:24,155 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:24,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:24,196 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2018-01-20 22:12:24,450 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:24,450 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 22:12:24,461 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:24,551 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 1945 proven. 60 refuted. 0 times theorem prover too weak. 1030 trivial. 0 not checked. [2018-01-20 22:12:24,778 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:24,778 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2018-01-20 22:12:24,779 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-20 22:12:24,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-20 22:12:24,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:12:24,779 INFO L87 Difference]: Start difference. First operand 224 states and 246 transitions. Second operand 24 states. [2018-01-20 22:12:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:25,280 INFO L93 Difference]: Finished difference Result 533 states and 591 transitions. [2018-01-20 22:12:25,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-20 22:12:25,281 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 275 [2018-01-20 22:12:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:25,284 INFO L225 Difference]: With dead ends: 533 [2018-01-20 22:12:25,284 INFO L226 Difference]: Without dead ends: 420 [2018-01-20 22:12:25,286 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:12:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2018-01-20 22:12:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 272. [2018-01-20 22:12:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-01-20 22:12:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 300 transitions. [2018-01-20 22:12:25,302 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 300 transitions. Word has length 275 [2018-01-20 22:12:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:25,303 INFO L432 AbstractCegarLoop]: Abstraction has 272 states and 300 transitions. [2018-01-20 22:12:25,303 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-20 22:12:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 300 transitions. [2018-01-20 22:12:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-01-20 22:12:25,307 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:25,307 INFO L322 BasicCegarLoop]: trace histogram [48, 39, 39, 39, 39, 10, 9, 9, 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, 1] [2018-01-20 22:12:25,307 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:25,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1321832962, now seen corresponding path program 8 times [2018-01-20 22:12:25,307 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:25,308 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:25,308 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:25,309 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:25,309 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:25,345 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4893 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 4623 trivial. 0 not checked. [2018-01-20 22:12:25,623 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:25,623 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 22:12:25,628 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:12:25,649 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:25,686 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:25,693 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:25,700 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4893 backedges. 3005 proven. 87 refuted. 0 times theorem prover too weak. 1801 trivial. 0 not checked. [2018-01-20 22:12:25,947 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:25,947 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2018-01-20 22:12:25,948 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-20 22:12:25,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-20 22:12:25,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:12:25,948 INFO L87 Difference]: Start difference. First operand 272 states and 300 transitions. Second operand 27 states. [2018-01-20 22:12:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:26,846 INFO L93 Difference]: Finished difference Result 647 states and 718 transitions. [2018-01-20 22:12:26,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-20 22:12:26,847 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 333 [2018-01-20 22:12:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:26,850 INFO L225 Difference]: With dead ends: 647 [2018-01-20 22:12:26,850 INFO L226 Difference]: Without dead ends: 521 [2018-01-20 22:12:26,852 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2018-01-20 22:12:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2018-01-20 22:12:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 325. [2018-01-20 22:12:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-01-20 22:12:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 360 transitions. [2018-01-20 22:12:26,876 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 360 transitions. Word has length 333 [2018-01-20 22:12:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:26,877 INFO L432 AbstractCegarLoop]: Abstraction has 325 states and 360 transitions. [2018-01-20 22:12:26,877 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-20 22:12:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 360 transitions. [2018-01-20 22:12:26,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-01-20 22:12:26,880 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:26,880 INFO L322 BasicCegarLoop]: trace histogram [59, 49, 49, 49, 49, 11, 10, 10, 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, 1] [2018-01-20 22:12:26,880 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash -626287868, now seen corresponding path program 9 times [2018-01-20 22:12:26,881 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:26,881 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:26,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:26,882 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:26,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:26,931 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7465 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 7130 trivial. 0 not checked. [2018-01-20 22:12:27,340 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:27,340 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 22:12:27,344 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:12:27,369 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:27,372 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:27,376 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:27,381 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:27,387 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:27,393 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:27,399 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:27,406 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:27,413 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:27,414 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:27,420 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7465 backedges. 1781 proven. 119 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2018-01-20 22:12:27,640 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:27,640 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-01-20 22:12:27,641 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-20 22:12:27,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-20 22:12:27,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2018-01-20 22:12:27,642 INFO L87 Difference]: Start difference. First operand 325 states and 360 transitions. Second operand 22 states. [2018-01-20 22:12:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:28,113 INFO L93 Difference]: Finished difference Result 737 states and 829 transitions. [2018-01-20 22:12:28,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-20 22:12:28,113 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 396 [2018-01-20 22:12:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:28,116 INFO L225 Difference]: With dead ends: 737 [2018-01-20 22:12:28,116 INFO L226 Difference]: Without dead ends: 674 [2018-01-20 22:12:28,117 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:12:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2018-01-20 22:12:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 391. [2018-01-20 22:12:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-01-20 22:12:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 439 transitions. [2018-01-20 22:12:28,138 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 439 transitions. Word has length 396 [2018-01-20 22:12:28,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:28,139 INFO L432 AbstractCegarLoop]: Abstraction has 391 states and 439 transitions. [2018-01-20 22:12:28,139 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-20 22:12:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 439 transitions. [2018-01-20 22:12:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-01-20 22:12:28,142 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:28,142 INFO L322 BasicCegarLoop]: trace histogram [71, 60, 60, 60, 60, 12, 11, 11, 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, 1] [2018-01-20 22:12:28,142 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:28,142 INFO L82 PathProgramCache]: Analyzing trace with hash -307953698, now seen corresponding path program 10 times [2018-01-20 22:12:28,142 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:28,142 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:28,143 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:28,143 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:28,143 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:28,181 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10907 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 10500 trivial. 0 not checked. [2018-01-20 22:12:28,652 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:28,652 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 22:12:28,657 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:12:28,749 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:28,757 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10907 backedges. 6160 proven. 156 refuted. 0 times theorem prover too weak. 4591 trivial. 0 not checked. [2018-01-20 22:12:29,266 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:29,266 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2018-01-20 22:12:29,267 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-20 22:12:29,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-20 22:12:29,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2018-01-20 22:12:29,268 INFO L87 Difference]: Start difference. First operand 391 states and 439 transitions. Second operand 33 states. [2018-01-20 22:12:30,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:30,536 INFO L93 Difference]: Finished difference Result 955 states and 1079 transitions. [2018-01-20 22:12:30,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-20 22:12:30,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 464 [2018-01-20 22:12:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:30,540 INFO L225 Difference]: With dead ends: 955 [2018-01-20 22:12:30,540 INFO L226 Difference]: Without dead ends: 789 [2018-01-20 22:12:30,541 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2018-01-20 22:12:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2018-01-20 22:12:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 454. [2018-01-20 22:12:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2018-01-20 22:12:30,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 508 transitions. [2018-01-20 22:12:30,564 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 508 transitions. Word has length 464 [2018-01-20 22:12:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:30,564 INFO L432 AbstractCegarLoop]: Abstraction has 454 states and 508 transitions. [2018-01-20 22:12:30,564 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-20 22:12:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 508 transitions. [2018-01-20 22:12:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2018-01-20 22:12:30,568 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:30,568 INFO L322 BasicCegarLoop]: trace histogram [83, 71, 71, 71, 71, 13, 12, 12, 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, 1] [2018-01-20 22:12:30,568 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:30,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1759665720, now seen corresponding path program 11 times [2018-01-20 22:12:30,569 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:30,569 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:30,569 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:30,570 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:30,570 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:30,608 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15011 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 14525 trivial. 0 not checked. [2018-01-20 22:12:31,182 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:31,182 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 22:12:31,189 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:12:31,221 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,226 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,233 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,240 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,249 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,258 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,268 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,285 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,297 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,299 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:31,310 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15011 backedges. 8864 proven. 564 refuted. 0 times theorem prover too weak. 5583 trivial. 0 not checked. [2018-01-20 22:12:31,986 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:31,999 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 34 [2018-01-20 22:12:32,000 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-20 22:12:32,000 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-20 22:12:32,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:12:32,001 INFO L87 Difference]: Start difference. First operand 454 states and 508 transitions. Second operand 34 states. [2018-01-20 22:12:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:33,274 INFO L93 Difference]: Finished difference Result 841 states and 933 transitions. [2018-01-20 22:12:33,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-20 22:12:33,274 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 532 [2018-01-20 22:12:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:33,278 INFO L225 Difference]: With dead ends: 841 [2018-01-20 22:12:33,278 INFO L226 Difference]: Without dead ends: 662 [2018-01-20 22:12:33,281 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=3631, Unknown=0, NotChecked=0, Total=4290 [2018-01-20 22:12:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2018-01-20 22:12:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 458. [2018-01-20 22:12:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2018-01-20 22:12:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 512 transitions. [2018-01-20 22:12:33,314 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 512 transitions. Word has length 532 [2018-01-20 22:12:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:33,315 INFO L432 AbstractCegarLoop]: Abstraction has 458 states and 512 transitions. [2018-01-20 22:12:33,315 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-20 22:12:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 512 transitions. [2018-01-20 22:12:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2018-01-20 22:12:33,320 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:33,321 INFO L322 BasicCegarLoop]: trace histogram [94, 81, 81, 81, 81, 14, 13, 13, 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, 1] [2018-01-20 22:12:33,321 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:33,321 INFO L82 PathProgramCache]: Analyzing trace with hash 835853446, now seen corresponding path program 12 times [2018-01-20 22:12:33,321 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:33,321 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:33,322 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:33,322 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:33,323 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:33,388 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19346 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 18774 trivial. 0 not checked. [2018-01-20 22:12:34,144 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:34,144 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 22:12:34,157 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:12:34,195 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,205 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,221 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,239 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,254 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,271 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,283 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,299 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,334 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,362 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,394 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,418 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,444 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,462 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,493 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,519 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,605 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,631 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,746 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,774 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,838 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:34,841 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:34,853 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 19346 backedges. 3734 proven. 198 refuted. 0 times theorem prover too weak. 15414 trivial. 0 not checked. [2018-01-20 22:12:35,254 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:35,254 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2018-01-20 22:12:35,256 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-20 22:12:35,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-20 22:12:35,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:12:35,256 INFO L87 Difference]: Start difference. First operand 458 states and 512 transitions. Second operand 27 states. [2018-01-20 22:12:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:35,792 INFO L93 Difference]: Finished difference Result 1063 states and 1202 transitions. [2018-01-20 22:12:35,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-20 22:12:35,792 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 595 [2018-01-20 22:12:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:35,799 INFO L225 Difference]: With dead ends: 1063 [2018-01-20 22:12:35,799 INFO L226 Difference]: Without dead ends: 985 [2018-01-20 22:12:35,801 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:12:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2018-01-20 22:12:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 534. [2018-01-20 22:12:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2018-01-20 22:12:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 604 transitions. [2018-01-20 22:12:35,842 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 604 transitions. Word has length 595 [2018-01-20 22:12:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:35,844 INFO L432 AbstractCegarLoop]: Abstraction has 534 states and 604 transitions. [2018-01-20 22:12:35,844 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-20 22:12:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 604 transitions. [2018-01-20 22:12:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2018-01-20 22:12:35,850 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:35,851 INFO L322 BasicCegarLoop]: trace histogram [109, 95, 95, 95, 95, 15, 14, 14, 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, 1] [2018-01-20 22:12:35,851 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:35,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2131540612, now seen corresponding path program 13 times [2018-01-20 22:12:35,851 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:35,851 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:35,852 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:35,852 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:35,852 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:35,919 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 26196 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 25531 trivial. 0 not checked. [2018-01-20 22:12:36,924 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:36,924 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 22:12:36,929 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:37,058 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 26196 backedges. 14734 proven. 245 refuted. 0 times theorem prover too weak. 11217 trivial. 0 not checked. [2018-01-20 22:12:37,652 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:37,652 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25] total 40 [2018-01-20 22:12:37,653 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-20 22:12:37,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-20 22:12:37,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 22:12:37,654 INFO L87 Difference]: Start difference. First operand 534 states and 604 transitions. Second operand 40 states. [2018-01-20 22:12:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:38,704 INFO L93 Difference]: Finished difference Result 1310 states and 1484 transitions. [2018-01-20 22:12:38,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-20 22:12:38,705 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 678 [2018-01-20 22:12:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:38,708 INFO L225 Difference]: With dead ends: 1310 [2018-01-20 22:12:38,708 INFO L226 Difference]: Without dead ends: 1106 [2018-01-20 22:12:38,710 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=3461, Unknown=0, NotChecked=0, Total=4160 [2018-01-20 22:12:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2018-01-20 22:12:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 607. [2018-01-20 22:12:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-01-20 22:12:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 684 transitions. [2018-01-20 22:12:38,740 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 684 transitions. Word has length 678 [2018-01-20 22:12:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:38,740 INFO L432 AbstractCegarLoop]: Abstraction has 607 states and 684 transitions. [2018-01-20 22:12:38,740 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-20 22:12:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 684 transitions. [2018-01-20 22:12:38,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2018-01-20 22:12:38,745 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:38,745 INFO L322 BasicCegarLoop]: trace histogram [124, 109, 109, 109, 109, 16, 15, 15, 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, 1] [2018-01-20 22:12:38,745 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2137681098, now seen corresponding path program 14 times [2018-01-20 22:12:38,746 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:38,746 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:38,746 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:38,747 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:38,747 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:38,799 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34095 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 33330 trivial. 0 not checked. [2018-01-20 22:12:39,859 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:39,859 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 22:12:39,865 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:12:39,906 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:39,995 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:40,009 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:40,018 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34095 backedges. 19777 proven. 198 refuted. 0 times theorem prover too weak. 14120 trivial. 0 not checked. [2018-01-20 22:12:40,627 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:40,627 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2018-01-20 22:12:40,628 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-20 22:12:40,628 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-20 22:12:40,629 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:12:40,629 INFO L87 Difference]: Start difference. First operand 607 states and 684 transitions. Second operand 39 states. [2018-01-20 22:12:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:41,581 INFO L93 Difference]: Finished difference Result 1231 states and 1370 transitions. [2018-01-20 22:12:41,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-20 22:12:41,581 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 761 [2018-01-20 22:12:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:41,585 INFO L225 Difference]: With dead ends: 1231 [2018-01-20 22:12:41,585 INFO L226 Difference]: Without dead ends: 1014 [2018-01-20 22:12:41,588 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 741 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2018-01-20 22:12:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2018-01-20 22:12:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 611. [2018-01-20 22:12:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2018-01-20 22:12:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 688 transitions. [2018-01-20 22:12:41,637 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 688 transitions. Word has length 761 [2018-01-20 22:12:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:41,638 INFO L432 AbstractCegarLoop]: Abstraction has 611 states and 688 transitions. [2018-01-20 22:12:41,638 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-20 22:12:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 688 transitions. [2018-01-20 22:12:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2018-01-20 22:12:41,647 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:41,647 INFO L322 BasicCegarLoop]: trace histogram [137, 121, 121, 121, 121, 17, 16, 16, 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, 1] [2018-01-20 22:12:41,647 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:41,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1219868744, now seen corresponding path program 15 times [2018-01-20 22:12:41,648 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:41,648 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:41,649 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:41,649 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:41,649 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:41,734 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 41764 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 40892 trivial. 0 not checked. [2018-01-20 22:12:43,304 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:43,304 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 22:12:43,309 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:12:43,348 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,351 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,354 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,358 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,364 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,369 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,376 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,383 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,391 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,404 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,422 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,439 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,454 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:43,456 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:43,469 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 41764 backedges. 6767 proven. 297 refuted. 0 times theorem prover too weak. 34700 trivial. 0 not checked. [2018-01-20 22:12:44,006 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:44,006 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2018-01-20 22:12:44,007 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-20 22:12:44,007 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-20 22:12:44,007 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=729, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:12:44,007 INFO L87 Difference]: Start difference. First operand 611 states and 688 transitions. Second operand 32 states. [2018-01-20 22:12:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:44,600 INFO L93 Difference]: Finished difference Result 1448 states and 1644 transitions. [2018-01-20 22:12:44,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-20 22:12:44,600 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 834 [2018-01-20 22:12:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:44,606 INFO L225 Difference]: With dead ends: 1448 [2018-01-20 22:12:44,606 INFO L226 Difference]: Without dead ends: 1355 [2018-01-20 22:12:44,608 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2018-01-20 22:12:44,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2018-01-20 22:12:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 697. [2018-01-20 22:12:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2018-01-20 22:12:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 793 transitions. [2018-01-20 22:12:44,665 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 793 transitions. Word has length 834 [2018-01-20 22:12:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:44,666 INFO L432 AbstractCegarLoop]: Abstraction has 697 states and 793 transitions. [2018-01-20 22:12:44,666 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-20 22:12:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 793 transitions. [2018-01-20 22:12:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2018-01-20 22:12:44,677 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:44,677 INFO L322 BasicCegarLoop]: trace histogram [155, 138, 138, 138, 138, 18, 17, 17, 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, 1] [2018-01-20 22:12:44,677 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:44,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1207046686, now seen corresponding path program 16 times [2018-01-20 22:12:44,678 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:44,678 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:44,679 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:44,679 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:44,679 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:44,766 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 53759 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 52773 trivial. 0 not checked. [2018-01-20 22:12:46,233 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:46,233 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 22:12:46,238 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:12:46,404 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:46,421 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 53759 backedges. 29984 proven. 354 refuted. 0 times theorem prover too weak. 23421 trivial. 0 not checked. [2018-01-20 22:12:47,462 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:47,462 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 47 [2018-01-20 22:12:47,463 INFO L409 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-01-20 22:12:47,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-01-20 22:12:47,464 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2018-01-20 22:12:47,464 INFO L87 Difference]: Start difference. First operand 697 states and 793 transitions. Second operand 47 states. [2018-01-20 22:12:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:48,771 INFO L93 Difference]: Finished difference Result 1717 states and 1949 transitions. [2018-01-20 22:12:48,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-20 22:12:48,771 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 932 [2018-01-20 22:12:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:48,776 INFO L225 Difference]: With dead ends: 1717 [2018-01-20 22:12:48,776 INFO L226 Difference]: Without dead ends: 1475 [2018-01-20 22:12:48,779 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 906 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=966, Invalid=4886, Unknown=0, NotChecked=0, Total=5852 [2018-01-20 22:12:48,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2018-01-20 22:12:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 780. [2018-01-20 22:12:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-01-20 22:12:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 884 transitions. [2018-01-20 22:12:48,845 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 884 transitions. Word has length 932 [2018-01-20 22:12:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:48,846 INFO L432 AbstractCegarLoop]: Abstraction has 780 states and 884 transitions. [2018-01-20 22:12:48,846 INFO L433 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-01-20 22:12:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 884 transitions. [2018-01-20 22:12:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2018-01-20 22:12:48,858 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:48,859 INFO L322 BasicCegarLoop]: trace histogram [173, 155, 155, 155, 155, 19, 18, 18, 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, 1] [2018-01-20 22:12:48,859 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:48,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1929501300, now seen corresponding path program 17 times [2018-01-20 22:12:48,860 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:48,860 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:48,860 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:48,861 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:48,861 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:48,961 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 67280 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 66173 trivial. 0 not checked. [2018-01-20 22:12:50,805 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:50,805 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 22:12:50,812 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:12:50,866 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,868 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,869 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,871 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,873 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,876 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,879 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,886 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,896 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,907 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,917 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,933 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,950 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,969 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:50,994 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:51,024 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:51,059 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:51,103 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:51,141 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:51,185 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:51,191 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:51,203 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 67280 backedges. 38154 proven. 1615 refuted. 0 times theorem prover too weak. 27511 trivial. 0 not checked. [2018-01-20 22:12:52,066 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:52,066 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29] total 48 [2018-01-20 22:12:52,067 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-20 22:12:52,067 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-20 22:12:52,068 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1878, Unknown=0, NotChecked=0, Total=2256 [2018-01-20 22:12:52,068 INFO L87 Difference]: Start difference. First operand 780 states and 884 transitions. Second operand 48 states. [2018-01-20 22:12:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:53,718 INFO L93 Difference]: Finished difference Result 1998 states and 2255 transitions. [2018-01-20 22:12:53,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-01-20 22:12:53,718 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 1030 [2018-01-20 22:12:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:53,722 INFO L225 Difference]: With dead ends: 1998 [2018-01-20 22:12:53,723 INFO L226 Difference]: Without dead ends: 1188 [2018-01-20 22:12:53,726 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1264, Invalid=7478, Unknown=0, NotChecked=0, Total=8742 [2018-01-20 22:12:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2018-01-20 22:12:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 784. [2018-01-20 22:12:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-01-20 22:12:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 877 transitions. [2018-01-20 22:12:53,767 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 877 transitions. Word has length 1030 [2018-01-20 22:12:53,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:53,767 INFO L432 AbstractCegarLoop]: Abstraction has 784 states and 877 transitions. [2018-01-20 22:12:53,768 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-20 22:12:53,768 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 877 transitions. [2018-01-20 22:12:53,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2018-01-20 22:12:53,776 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:53,777 INFO L322 BasicCegarLoop]: trace histogram [188, 169, 169, 169, 169, 20, 19, 19, 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, 1] [2018-01-20 22:12:53,777 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1560989770, now seen corresponding path program 18 times [2018-01-20 22:12:53,777 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:53,777 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:53,778 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:53,778 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:53,778 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:53,850 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 79663 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 78428 trivial. 0 not checked. [2018-01-20 22:12:55,598 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:55,598 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 22:12:55,604 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:12:55,651 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,653 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,658 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,661 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,663 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,668 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,673 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,680 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,689 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,710 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,716 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,725 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,734 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,744 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,753 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,761 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,774 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,784 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,809 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,820 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,843 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,856 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,882 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,903 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,939 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:55,985 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:56,116 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:56,185 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:56,189 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:56,200 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 79663 backedges. 11120 proven. 416 refuted. 0 times theorem prover too weak. 68127 trivial. 0 not checked. [2018-01-20 22:12:56,819 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:56,819 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2018-01-20 22:12:56,820 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-20 22:12:56,820 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-20 22:12:56,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=980, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:12:56,820 INFO L87 Difference]: Start difference. First operand 784 states and 877 transitions. Second operand 37 states. [2018-01-20 22:12:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:57,691 INFO L93 Difference]: Finished difference Result 1793 states and 2032 transitions. [2018-01-20 22:12:57,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-01-20 22:12:57,692 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1113 [2018-01-20 22:12:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:57,697 INFO L225 Difference]: With dead ends: 1793 [2018-01-20 22:12:57,698 INFO L226 Difference]: Without dead ends: 1685 [2018-01-20 22:12:57,699 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1099 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=590, Invalid=1960, Unknown=0, NotChecked=0, Total=2550 [2018-01-20 22:12:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2018-01-20 22:12:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 880. [2018-01-20 22:12:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-01-20 22:12:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 994 transitions. [2018-01-20 22:12:57,775 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 994 transitions. Word has length 1113 [2018-01-20 22:12:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:57,776 INFO L432 AbstractCegarLoop]: Abstraction has 880 states and 994 transitions. [2018-01-20 22:12:57,776 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-20 22:12:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 994 transitions. [2018-01-20 22:12:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1227 [2018-01-20 22:12:57,790 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:57,791 INFO L322 BasicCegarLoop]: trace histogram [209, 189, 189, 189, 189, 21, 20, 20, 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, 1] [2018-01-20 22:12:57,791 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:57,791 INFO L82 PathProgramCache]: Analyzing trace with hash -758668612, now seen corresponding path program 19 times [2018-01-20 22:12:57,791 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:57,791 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:57,792 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:57,792 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:57,793 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:57,895 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 22:12:58,822 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 22:12:58,825 INFO L168 Benchmark]: Toolchain (without parser) took 40984.07 ms. Allocated memory was 303.0 MB in the beginning and 2.1 GB in the end (delta: 1.8 GB). Free memory was 262.4 MB in the beginning and 292.8 MB in the end (delta: -30.4 MB). Peak memory consumption was 1.7 GB. Max. memory is 5.3 GB. [2018-01-20 22:12:58,826 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 303.0 MB. Free memory is still 267.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 22:12:58,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.46 ms. Allocated memory is still 303.0 MB. Free memory was 262.4 MB in the beginning and 253.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. [2018-01-20 22:12:58,827 INFO L168 Benchmark]: Boogie Preprocessor took 31.24 ms. Allocated memory is still 303.0 MB. Free memory was 253.3 MB in the beginning and 252.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-20 22:12:58,827 INFO L168 Benchmark]: RCFGBuilder took 234.76 ms. Allocated memory is still 303.0 MB. Free memory was 252.3 MB in the beginning and 236.5 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 5.3 GB. [2018-01-20 22:12:58,828 INFO L168 Benchmark]: TraceAbstraction took 40537.51 ms. Allocated memory was 303.0 MB in the beginning and 2.1 GB in the end (delta: 1.8 GB). Free memory was 236.5 MB in the beginning and 292.8 MB in the end (delta: -56.3 MB). Peak memory consumption was 1.7 GB. Max. memory is 5.3 GB. [2018-01-20 22:12:58,830 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 303.0 MB. Free memory is still 267.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 173.46 ms. Allocated memory is still 303.0 MB. Free memory was 262.4 MB in the beginning and 253.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 31.24 ms. Allocated memory is still 303.0 MB. Free memory was 253.3 MB in the beginning and 252.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 234.76 ms. Allocated memory is still 303.0 MB. Free memory was 252.3 MB in the beginning and 236.5 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 40537.51 ms. Allocated memory was 303.0 MB in the beginning and 2.1 GB in the end (delta: 1.8 GB). Free memory was 236.5 MB in the beginning and 292.8 MB in the end (delta: -56.3 MB). Peak memory consumption was 1.7 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, 44 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=44occurred 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: 12]: 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, 44 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 46 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=44occurred 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/ArraysOfVariableLength_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_22-12-58-838.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_22-12-58-838.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_22-12-58-838.csv Completed graceful shutdown