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-read.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 22:11:54,873 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 22:11:54,875 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 22:11:54,891 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 22:11:54,891 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 22:11:54,892 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 22:11:54,893 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 22:11:54,895 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 22:11:54,897 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 22:11:54,898 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 22:11:54,899 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 22:11:54,900 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 22:11:54,901 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 22:11:54,902 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 22:11:54,903 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 22:11:54,906 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 22:11:54,908 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 22:11:54,910 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 22:11:54,911 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 22:11:54,913 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 22:11:54,915 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 22:11:54,920 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 22:11:54,921 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 22:11:54,922 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 22:11:54,930 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 22:11:54,930 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 22:11:54,931 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 22:11:54,931 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 22:11:54,931 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 22:11:54,931 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 22:11:54,932 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 22:11:54,932 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 22:11:54,932 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 22:11:54,932 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 22:11:54,932 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 22:11:54,932 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 22:11:54,933 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 22:11:54,933 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 22:11:54,933 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 22:11:54,933 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 22:11:54,933 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 22:11:54,933 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 22:11:54,933 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 22:11:54,934 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 22:11:54,934 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 22:11:54,934 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 22:11:54,934 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 22:11:54,934 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 22:11:54,934 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 22:11:54,935 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:11:54,935 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 22:11:54,935 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 22:11:54,935 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 22:11:54,935 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 22:11:54,935 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 22:11:54,935 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 22:11:54,936 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 22:11:54,936 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 22:11:54,936 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 22:11:54,936 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 22:11:54,937 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 22:11:54,971 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 22:11:55,004 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 22:11:55,008 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 22:11:55,009 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 22:11:55,010 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 22:11:55,010 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_false-valid-deref-read.c [2018-01-20 22:11:55,144 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 22:11:55,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 22:11:55,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 22:11:55,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 22:11:55,155 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 22:11:55,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:11:55" (1/1) ... [2018-01-20 22:11:55,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b199dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55, skipping insertion in model container [2018-01-20 22:11:55,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:11:55" (1/1) ... [2018-01-20 22:11:55,172 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:11:55,186 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:11:55,300 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:11:55,317 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:11:55,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55 WrapperNode [2018-01-20 22:11:55,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 22:11:55,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 22:11:55,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 22:11:55,325 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 22:11:55,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55" (1/1) ... [2018-01-20 22:11:55,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55" (1/1) ... [2018-01-20 22:11:55,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55" (1/1) ... [2018-01-20 22:11:55,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55" (1/1) ... [2018-01-20 22:11:55,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55" (1/1) ... [2018-01-20 22:11:55,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55" (1/1) ... [2018-01-20 22:11:55,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55" (1/1) ... [2018-01-20 22:11:55,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 22:11:55,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 22:11:55,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 22:11:55,356 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 22:11:55,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55" (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 22:11:55,431 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 22:11:55,432 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 22:11:55,432 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-20 22:11:55,432 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 22:11:55,432 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 22:11:55,432 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 22:11:55,432 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 22:11:55,432 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 22:11:55,432 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 22:11:55,433 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-20 22:11:55,433 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 22:11:55,433 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 22:11:55,433 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 22:11:55,613 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 22:11:55,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:11:55 BoogieIcfgContainer [2018-01-20 22:11:55,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 22:11:55,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 22:11:55,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 22:11:55,617 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 22:11:55,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 10:11:55" (1/3) ... [2018-01-20 22:11:55,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb060af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:11:55, skipping insertion in model container [2018-01-20 22:11:55,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:55" (2/3) ... [2018-01-20 22:11:55,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb060af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:11:55, skipping insertion in model container [2018-01-20 22:11:55,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:11:55" (3/3) ... [2018-01-20 22:11:55,622 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_false-valid-deref-read.c [2018-01-20 22:11:55,634 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 22:11:55,646 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 22:11:55,697 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:11:55,697 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:11:55,698 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:11:55,698 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:11:55,698 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:11:55,698 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:11:55,698 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:11:55,699 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 22:11:55,700 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:11:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-20 22:11:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 22:11:55,728 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:55,729 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 22:11:55,730 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 22:11:55,735 INFO L82 PathProgramCache]: Analyzing trace with hash 102829, now seen corresponding path program 1 times [2018-01-20 22:11:55,737 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:55,738 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:55,787 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:55,788 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:55,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:11:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:11:55,836 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 22:11:55,842 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:11:55,847 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:11:55,847 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:11:55,847 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:11:55,847 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:11:55,848 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:11:55,848 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:11:55,848 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:11:55,848 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-20 22:11:55,848 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:11:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-20 22:11:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-20 22:11:55,850 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:55,850 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:55,850 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-20 22:11:55,851 INFO L82 PathProgramCache]: Analyzing trace with hash 33657389, now seen corresponding path program 1 times [2018-01-20 22:11:55,851 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:55,851 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:55,852 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:55,852 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:55,852 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:55,876 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:55,904 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 22:11:55,906 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:55,906 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:11:55,907 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:11:55,917 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:11:55,917 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:11:55,919 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-20 22:11:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:55,939 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2018-01-20 22:11:55,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:11:55,966 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-20 22:11:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:55,974 INFO L225 Difference]: With dead ends: 76 [2018-01-20 22:11:55,975 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 22:11:55,978 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 22:11:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 22:11:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 22:11:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 22:11:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 22:11:56,077 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-20 22:11:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:56,077 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 22:11:56,077 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:11:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 22:11:56,078 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 22:11:56,081 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:11:56,081 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:11:56,081 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:11:56,081 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:11:56,081 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:11:56,082 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:11:56,082 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:11:56,082 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 22:11:56,082 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:11:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-20 22:11:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 22:11:56,085 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:56,086 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 22:11:56,086 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:56,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1331820257, now seen corresponding path program 1 times [2018-01-20 22:11:56,086 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:56,087 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:56,088 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,088 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:56,088 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:56,098 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:56,111 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 22:11:56,111 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:56,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:11:56,112 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:11:56,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:11:56,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:11:56,112 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-20 22:11:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:56,117 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2018-01-20 22:11:56,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:11:56,117 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-20 22:11:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:56,119 INFO L225 Difference]: With dead ends: 76 [2018-01-20 22:11:56,119 INFO L226 Difference]: Without dead ends: 39 [2018-01-20 22:11:56,119 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 22:11:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-20 22:11:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-20 22:11:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-20 22:11:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-01-20 22:11:56,128 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 17 [2018-01-20 22:11:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:56,129 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-01-20 22:11:56,129 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:11:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-01-20 22:11:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 22:11:56,130 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:56,130 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 22:11:56,130 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:56,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1785977394, now seen corresponding path program 1 times [2018-01-20 22:11:56,131 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:56,131 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:56,132 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,132 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:56,132 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:56,144 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:56,177 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 22:11:56,178 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:56,178 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 22:11:56,180 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 22:11:56,180 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 22:11:56,180 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 22:11:56,180 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 3 states. [2018-01-20 22:11:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:56,222 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2018-01-20 22:11:56,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 22:11:56,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-20 22:11:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:56,224 INFO L225 Difference]: With dead ends: 58 [2018-01-20 22:11:56,224 INFO L226 Difference]: Without dead ends: 43 [2018-01-20 22:11:56,225 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 22:11:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-20 22:11:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2018-01-20 22:11:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-20 22:11:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-01-20 22:11:56,236 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 19 [2018-01-20 22:11:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:56,236 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-01-20 22:11:56,236 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 22:11:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-01-20 22:11:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-20 22:11:56,237 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:56,238 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 22:11:56,238 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:56,238 INFO L82 PathProgramCache]: Analyzing trace with hash -751966911, now seen corresponding path program 1 times [2018-01-20 22:11:56,238 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:56,238 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:56,239 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,240 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:56,240 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:56,260 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:56,383 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 22:11:56,383 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:56,384 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-20 22:11:56,384 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 22:11:56,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 22:11:56,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-20 22:11:56,385 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 6 states. [2018-01-20 22:11:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:56,511 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2018-01-20 22:11:56,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 22:11:56,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-01-20 22:11:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:56,514 INFO L225 Difference]: With dead ends: 79 [2018-01-20 22:11:56,514 INFO L226 Difference]: Without dead ends: 51 [2018-01-20 22:11:56,515 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:11:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-20 22:11:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2018-01-20 22:11:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-20 22:11:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2018-01-20 22:11:56,523 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2018-01-20 22:11:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:56,524 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2018-01-20 22:11:56,524 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 22:11:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2018-01-20 22:11:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-20 22:11:56,527 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:56,527 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:56,527 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:56,527 INFO L82 PathProgramCache]: Analyzing trace with hash -335791331, now seen corresponding path program 1 times [2018-01-20 22:11:56,527 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:56,527 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:56,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,529 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:56,529 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:56,546 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-20 22:11:56,585 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:56,585 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 22:11:56,592 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:56,619 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-20 22:11:56,699 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:56,699 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-01-20 22:11:56,700 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-20 22:11:56,700 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-20 22:11:56,700 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-20 22:11:56,700 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2018-01-20 22:11:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:56,725 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2018-01-20 22:11:56,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 22:11:56,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2018-01-20 22:11:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:56,727 INFO L225 Difference]: With dead ends: 67 [2018-01-20 22:11:56,727 INFO L226 Difference]: Without dead ends: 55 [2018-01-20 22:11:56,727 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-20 22:11:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-20 22:11:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2018-01-20 22:11:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-20 22:11:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-01-20 22:11:56,736 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2018-01-20 22:11:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:56,736 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-01-20 22:11:56,736 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-20 22:11:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-01-20 22:11:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-20 22:11:56,738 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:56,738 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2018-01-20 22:11:56,739 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash -291520001, now seen corresponding path program 2 times [2018-01-20 22:11:56,739 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:56,739 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:56,740 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,740 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:56,740 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:56,761 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-20 22:11:56,847 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:56,847 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 22:11:56,856 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:11:56,870 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:56,880 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:56,893 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:56,896 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-20 22:11:56,961 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-20 22:11:56,962 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2018-01-20 22:11:56,962 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 22:11:56,962 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 22:11:56,962 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:11:56,963 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2018-01-20 22:11:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:57,176 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2018-01-20 22:11:57,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 22:11:57,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2018-01-20 22:11:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:57,177 INFO L225 Difference]: With dead ends: 98 [2018-01-20 22:11:57,177 INFO L226 Difference]: Without dead ends: 62 [2018-01-20 22:11:57,178 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:11:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-20 22:11:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2018-01-20 22:11:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-20 22:11:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-01-20 22:11:57,186 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 52 [2018-01-20 22:11:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:57,187 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-01-20 22:11:57,187 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 22:11:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-01-20 22:11:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-01-20 22:11:57,189 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:57,190 INFO L322 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 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 22:11:57,190 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:57,190 INFO L82 PathProgramCache]: Analyzing trace with hash -219458911, now seen corresponding path program 3 times [2018-01-20 22:11:57,190 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:57,190 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:57,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:57,191 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:57,192 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:57,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-01-20 22:11:57,290 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:57,290 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 22:11:57,298 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:11:57,312 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:57,318 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:57,323 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:57,324 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:57,328 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-01-20 22:11:57,395 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:57,395 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2018-01-20 22:11:57,396 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:11:57,396 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:11:57,396 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:11:57,396 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 10 states. [2018-01-20 22:11:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:57,553 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2018-01-20 22:11:57,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-20 22:11:57,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2018-01-20 22:11:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:57,556 INFO L225 Difference]: With dead ends: 127 [2018-01-20 22:11:57,557 INFO L226 Difference]: Without dead ends: 115 [2018-01-20 22:11:57,557 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:11:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-20 22:11:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 85. [2018-01-20 22:11:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-20 22:11:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-01-20 22:11:57,570 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 75 [2018-01-20 22:11:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:57,571 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-01-20 22:11:57,571 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:11:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-01-20 22:11:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-01-20 22:11:57,574 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:57,574 INFO L322 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 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 22:11:57,574 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash 383245375, now seen corresponding path program 4 times [2018-01-20 22:11:57,575 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:57,575 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:57,577 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:57,577 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:57,577 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:57,607 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2018-01-20 22:11:57,739 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:57,740 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 22:11:57,748 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:11:57,789 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:57,795 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 188 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-01-20 22:11:58,046 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:58,046 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2018-01-20 22:11:58,047 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-20 22:11:58,047 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-20 22:11:58,047 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-01-20 22:11:58,047 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 14 states. [2018-01-20 22:11:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:58,379 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2018-01-20 22:11:58,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-20 22:11:58,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 108 [2018-01-20 22:11:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:58,380 INFO L225 Difference]: With dead ends: 221 [2018-01-20 22:11:58,380 INFO L226 Difference]: Without dead ends: 163 [2018-01-20 22:11:58,381 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-01-20 22:11:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-01-20 22:11:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2018-01-20 22:11:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-01-20 22:11:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2018-01-20 22:11:58,393 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 108 [2018-01-20 22:11:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:58,393 INFO L432 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2018-01-20 22:11:58,393 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-20 22:11:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2018-01-20 22:11:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-01-20 22:11:58,396 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:58,396 INFO L322 BasicCegarLoop]: trace histogram [16, 11, 11, 11, 11, 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 22:11:58,396 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1556430117, now seen corresponding path program 5 times [2018-01-20 22:11:58,396 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:58,397 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:58,397 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:58,397 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:58,397 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:58,429 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2018-01-20 22:11:58,634 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:58,634 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 22:11:58,648 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:11:58,662 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:58,676 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:58,686 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:58,703 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:58,711 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:58,726 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:58,733 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 215 proven. 18 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-01-20 22:11:58,849 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:58,849 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2018-01-20 22:11:58,849 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-20 22:11:58,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-20 22:11:58,850 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-01-20 22:11:58,850 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 15 states. [2018-01-20 22:11:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:59,119 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2018-01-20 22:11:59,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-20 22:11:59,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 141 [2018-01-20 22:11:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:59,121 INFO L225 Difference]: With dead ends: 194 [2018-01-20 22:11:59,121 INFO L226 Difference]: Without dead ends: 128 [2018-01-20 22:11:59,122 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2018-01-20 22:11:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-01-20 22:11:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2018-01-20 22:11:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-20 22:11:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2018-01-20 22:11:59,131 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 141 [2018-01-20 22:11:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:59,132 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2018-01-20 22:11:59,132 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-20 22:11:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2018-01-20 22:11:59,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-01-20 22:11:59,133 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:59,133 INFO L322 BasicCegarLoop]: trace histogram [21, 15, 15, 15, 15, 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 22:11:59,133 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:59,134 INFO L82 PathProgramCache]: Analyzing trace with hash -776394745, now seen corresponding path program 6 times [2018-01-20 22:11:59,134 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:59,134 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:59,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:59,134 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:59,135 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:59,165 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2018-01-20 22:11:59,311 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:59,311 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 22:11:59,316 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:11:59,337 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:59,342 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:59,347 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:59,350 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:59,354 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:59,360 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:59,366 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:59,371 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:59,378 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:59,379 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:59,385 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2018-01-20 22:11:59,437 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:59,437 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-20 22:11:59,438 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:11:59,438 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:11:59,438 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:11:59,438 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 10 states. [2018-01-20 22:11:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:59,501 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2018-01-20 22:11:59,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-20 22:11:59,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 174 [2018-01-20 22:11:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:59,503 INFO L225 Difference]: With dead ends: 136 [2018-01-20 22:11:59,503 INFO L226 Difference]: Without dead ends: 124 [2018-01-20 22:11:59,503 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:11:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-01-20 22:11:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2018-01-20 22:11:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-20 22:11:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2018-01-20 22:11:59,512 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 174 [2018-01-20 22:11:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:59,512 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2018-01-20 22:11:59,512 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:11:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2018-01-20 22:11:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-01-20 22:11:59,514 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:59,514 INFO L322 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 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 22:11:59,515 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1363016457, now seen corresponding path program 7 times [2018-01-20 22:11:59,515 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:59,515 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:59,516 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:59,516 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:59,516 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:59,548 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-01-20 22:11:59,712 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:59,712 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 22:11:59,720 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:59,785 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 860 proven. 21 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2018-01-20 22:12:00,006 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:00,006 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2018-01-20 22:12:00,007 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-20 22:12:00,007 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-20 22:12:00,007 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:12:00,007 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 19 states. [2018-01-20 22:12:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:00,309 INFO L93 Difference]: Finished difference Result 283 states and 316 transitions. [2018-01-20 22:12:00,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-20 22:12:00,309 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 202 [2018-01-20 22:12:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:00,311 INFO L225 Difference]: With dead ends: 283 [2018-01-20 22:12:00,312 INFO L226 Difference]: Without dead ends: 217 [2018-01-20 22:12:00,312 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:12:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-01-20 22:12:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 152. [2018-01-20 22:12:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-01-20 22:12:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 167 transitions. [2018-01-20 22:12:00,324 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 167 transitions. Word has length 202 [2018-01-20 22:12:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:00,325 INFO L432 AbstractCegarLoop]: Abstraction has 152 states and 167 transitions. [2018-01-20 22:12:00,325 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-20 22:12:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 167 transitions. [2018-01-20 22:12:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-01-20 22:12:00,327 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:00,327 INFO L322 BasicCegarLoop]: trace histogram [34, 26, 26, 26, 26, 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 22:12:00,327 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:00,328 INFO L82 PathProgramCache]: Analyzing trace with hash 875312667, now seen corresponding path program 8 times [2018-01-20 22:12:00,328 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:00,328 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:00,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:00,328 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:00,329 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:00,359 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2421 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2018-01-20 22:12:00,547 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:00,547 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 22:12:00,554 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:12:00,571 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:00,608 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:00,617 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:00,625 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2421 backedges. 1579 proven. 38 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2018-01-20 22:12:00,805 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:00,805 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2018-01-20 22:12:00,806 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-20 22:12:00,806 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-20 22:12:00,807 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-01-20 22:12:00,807 INFO L87 Difference]: Start difference. First operand 152 states and 167 transitions. Second operand 22 states. [2018-01-20 22:12:01,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:01,172 INFO L93 Difference]: Finished difference Result 364 states and 406 transitions. [2018-01-20 22:12:01,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-20 22:12:01,190 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 255 [2018-01-20 22:12:01,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:01,192 INFO L225 Difference]: With dead ends: 364 [2018-01-20 22:12:01,192 INFO L226 Difference]: Without dead ends: 290 [2018-01-20 22:12:01,193 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2018-01-20 22:12:01,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-01-20 22:12:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 190. [2018-01-20 22:12:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-01-20 22:12:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 210 transitions. [2018-01-20 22:12:01,208 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 210 transitions. Word has length 255 [2018-01-20 22:12:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:01,208 INFO L432 AbstractCegarLoop]: Abstraction has 190 states and 210 transitions. [2018-01-20 22:12:01,208 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-20 22:12:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 210 transitions. [2018-01-20 22:12:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-01-20 22:12:01,211 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:01,211 INFO L322 BasicCegarLoop]: trace histogram [44, 35, 35, 35, 35, 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 22:12:01,211 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:01,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1401085733, now seen corresponding path program 9 times [2018-01-20 22:12:01,212 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:01,212 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:01,213 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:01,213 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:01,213 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:01,252 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4091 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 3821 trivial. 0 not checked. [2018-01-20 22:12:01,530 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:01,530 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 22:12:01,536 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:12:01,557 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:01,561 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:01,564 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:01,569 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:01,575 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:01,581 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:01,587 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:01,588 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:01,596 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4091 backedges. 980 proven. 60 refuted. 0 times theorem prover too weak. 3051 trivial. 0 not checked. [2018-01-20 22:12:01,731 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:01,732 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2018-01-20 22:12:01,732 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-20 22:12:01,733 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-20 22:12:01,733 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:12:01,733 INFO L87 Difference]: Start difference. First operand 190 states and 210 transitions. Second operand 19 states. [2018-01-20 22:12:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:02,024 INFO L93 Difference]: Finished difference Result 454 states and 519 transitions. [2018-01-20 22:12:02,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-20 22:12:02,024 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 313 [2018-01-20 22:12:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:02,029 INFO L225 Difference]: With dead ends: 454 [2018-01-20 22:12:02,030 INFO L226 Difference]: Without dead ends: 442 [2018-01-20 22:12:02,031 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:12:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2018-01-20 22:12:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 241. [2018-01-20 22:12:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-01-20 22:12:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 273 transitions. [2018-01-20 22:12:02,068 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 273 transitions. Word has length 313 [2018-01-20 22:12:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:02,069 INFO L432 AbstractCegarLoop]: Abstraction has 241 states and 273 transitions. [2018-01-20 22:12:02,069 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-20 22:12:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 273 transitions. [2018-01-20 22:12:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-01-20 22:12:02,072 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:02,072 INFO L322 BasicCegarLoop]: trace histogram [55, 45, 45, 45, 45, 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 22:12:02,072 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:02,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1776678017, now seen corresponding path program 10 times [2018-01-20 22:12:02,073 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:02,073 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:02,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:02,074 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:02,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:02,119 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6455 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 6120 trivial. 0 not checked. [2018-01-20 22:12:02,473 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:02,473 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 22:12:02,478 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:12:02,540 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:02,548 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6455 backedges. 4040 proven. 87 refuted. 0 times theorem prover too weak. 2328 trivial. 0 not checked. [2018-01-20 22:12:02,797 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:02,797 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2018-01-20 22:12:02,797 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-20 22:12:02,798 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-20 22:12:02,798 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2018-01-20 22:12:02,798 INFO L87 Difference]: Start difference. First operand 241 states and 273 transitions. Second operand 28 states. [2018-01-20 22:12:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:03,286 INFO L93 Difference]: Finished difference Result 613 states and 705 transitions. [2018-01-20 22:12:03,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-20 22:12:03,287 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 376 [2018-01-20 22:12:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:03,292 INFO L225 Difference]: With dead ends: 613 [2018-01-20 22:12:03,292 INFO L226 Difference]: Without dead ends: 509 [2018-01-20 22:12:03,294 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2018-01-20 22:12:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2018-01-20 22:12:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2018-01-20 22:12:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-01-20 22:12:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 324 transitions. [2018-01-20 22:12:03,322 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 324 transitions. Word has length 376 [2018-01-20 22:12:03,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:03,323 INFO L432 AbstractCegarLoop]: Abstraction has 289 states and 324 transitions. [2018-01-20 22:12:03,323 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-20 22:12:03,323 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 324 transitions. [2018-01-20 22:12:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-01-20 22:12:03,326 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:03,327 INFO L322 BasicCegarLoop]: trace histogram [66, 55, 55, 55, 55, 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 22:12:03,327 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:03,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1714564055, now seen corresponding path program 11 times [2018-01-20 22:12:03,327 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:03,327 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:03,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:03,328 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:03,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:03,374 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9372 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 8965 trivial. 0 not checked. [2018-01-20 22:12:03,794 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:03,794 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 22:12:03,801 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:12:03,829 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:03,833 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:03,840 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:03,847 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:03,857 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:03,868 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:03,879 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:03,882 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:03,888 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9372 backedges. 5038 proven. 307 refuted. 0 times theorem prover too weak. 4027 trivial. 0 not checked. [2018-01-20 22:12:04,242 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:04,242 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2018-01-20 22:12:04,243 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-20 22:12:04,243 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-20 22:12:04,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2018-01-20 22:12:04,244 INFO L87 Difference]: Start difference. First operand 289 states and 324 transitions. Second operand 29 states. [2018-01-20 22:12:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:04,943 INFO L93 Difference]: Finished difference Result 654 states and 735 transitions. [2018-01-20 22:12:04,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-20 22:12:04,944 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 439 [2018-01-20 22:12:04,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:04,946 INFO L225 Difference]: With dead ends: 654 [2018-01-20 22:12:04,946 INFO L226 Difference]: Without dead ends: 352 [2018-01-20 22:12:04,948 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=490, Invalid=2590, Unknown=0, NotChecked=0, Total=3080 [2018-01-20 22:12:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-01-20 22:12:04,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 288. [2018-01-20 22:12:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-01-20 22:12:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 315 transitions. [2018-01-20 22:12:04,966 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 315 transitions. Word has length 439 [2018-01-20 22:12:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:04,966 INFO L432 AbstractCegarLoop]: Abstraction has 288 states and 315 transitions. [2018-01-20 22:12:04,966 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-20 22:12:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 315 transitions. [2018-01-20 22:12:04,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-01-20 22:12:04,968 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:04,969 INFO L322 BasicCegarLoop]: trace histogram [75, 63, 63, 63, 63, 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 22:12:04,969 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:04,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1807356171, now seen corresponding path program 12 times [2018-01-20 22:12:04,969 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:04,969 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:04,970 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:04,970 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:04,970 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:05,005 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12159 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 11673 trivial. 0 not checked. [2018-01-20 22:12:05,857 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:05,857 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 22:12:05,872 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:12:05,904 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:05,919 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:05,934 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:05,951 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:05,967 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:05,986 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,003 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,015 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,061 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,082 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,108 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,128 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,171 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,186 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,210 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,242 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,282 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:06,285 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:06,292 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12159 backedges. 2349 proven. 119 refuted. 0 times theorem prover too weak. 9691 trivial. 0 not checked. [2018-01-20 22:12:06,521 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:06,521 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2018-01-20 22:12:06,522 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-20 22:12:06,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-20 22:12:06,522 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:12:06,522 INFO L87 Difference]: Start difference. First operand 288 states and 315 transitions. Second operand 24 states. [2018-01-20 22:12:07,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:07,069 INFO L93 Difference]: Finished difference Result 647 states and 736 transitions. [2018-01-20 22:12:07,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-20 22:12:07,069 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 492 [2018-01-20 22:12:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:07,074 INFO L225 Difference]: With dead ends: 647 [2018-01-20 22:12:07,074 INFO L226 Difference]: Without dead ends: 635 [2018-01-20 22:12:07,076 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:12:07,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2018-01-20 22:12:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 349. [2018-01-20 22:12:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-01-20 22:12:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 390 transitions. [2018-01-20 22:12:07,109 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 390 transitions. Word has length 492 [2018-01-20 22:12:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:07,111 INFO L432 AbstractCegarLoop]: Abstraction has 349 states and 390 transitions. [2018-01-20 22:12:07,111 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-20 22:12:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 390 transitions. [2018-01-20 22:12:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-01-20 22:12:07,115 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:07,116 INFO L322 BasicCegarLoop]: trace histogram [89, 76, 76, 76, 76, 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 22:12:07,116 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:07,116 INFO L82 PathProgramCache]: Analyzing trace with hash -71372863, now seen corresponding path program 13 times [2018-01-20 22:12:07,116 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:07,116 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:07,117 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:07,117 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:07,117 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:07,171 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17266 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 16694 trivial. 0 not checked. [2018-01-20 22:12:07,829 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:07,829 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 22:12:07,835 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:07,997 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17266 backedges. 10370 proven. 156 refuted. 0 times theorem prover too weak. 6740 trivial. 0 not checked. [2018-01-20 22:12:08,602 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:08,603 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 35 [2018-01-20 22:12:08,604 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-20 22:12:08,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-20 22:12:08,604 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-01-20 22:12:08,605 INFO L87 Difference]: Start difference. First operand 349 states and 390 transitions. Second operand 35 states. [2018-01-20 22:12:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:09,578 INFO L93 Difference]: Finished difference Result 817 states and 932 transitions. [2018-01-20 22:12:09,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-20 22:12:09,578 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 570 [2018-01-20 22:12:09,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:09,583 INFO L225 Difference]: With dead ends: 817 [2018-01-20 22:12:09,584 INFO L226 Difference]: Without dead ends: 693 [2018-01-20 22:12:09,586 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2018-01-20 22:12:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2018-01-20 22:12:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 407. [2018-01-20 22:12:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-01-20 22:12:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 451 transitions. [2018-01-20 22:12:09,625 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 451 transitions. Word has length 570 [2018-01-20 22:12:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:09,626 INFO L432 AbstractCegarLoop]: Abstraction has 407 states and 451 transitions. [2018-01-20 22:12:09,626 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-20 22:12:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 451 transitions. [2018-01-20 22:12:09,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2018-01-20 22:12:09,631 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:09,632 INFO L322 BasicCegarLoop]: trace histogram [103, 89, 89, 89, 89, 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 22:12:09,632 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:09,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1198217585, now seen corresponding path program 14 times [2018-01-20 22:12:09,632 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:09,632 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:09,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:09,633 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:09,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:09,690 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23283 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 22618 trivial. 0 not checked. [2018-01-20 22:12:10,460 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:10,460 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 22:12:10,467 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:12:10,506 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:10,588 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:10,600 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:10,608 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 23283 backedges. 12715 proven. 119 refuted. 0 times theorem prover too weak. 10449 trivial. 0 not checked. [2018-01-20 22:12:11,131 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:11,131 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2018-01-20 22:12:11,132 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-20 22:12:11,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-20 22:12:11,133 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:12:11,133 INFO L87 Difference]: Start difference. First operand 407 states and 451 transitions. Second operand 34 states. [2018-01-20 22:12:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:12,436 INFO L93 Difference]: Finished difference Result 732 states and 806 transitions. [2018-01-20 22:12:12,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-20 22:12:12,437 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 648 [2018-01-20 22:12:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:12,443 INFO L225 Difference]: With dead ends: 732 [2018-01-20 22:12:12,444 INFO L226 Difference]: Without dead ends: 600 [2018-01-20 22:12:12,447 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=567, Invalid=2513, Unknown=0, NotChecked=0, Total=3080 [2018-01-20 22:12:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2018-01-20 22:12:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 406. [2018-01-20 22:12:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2018-01-20 22:12:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 449 transitions. [2018-01-20 22:12:12,485 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 449 transitions. Word has length 648 [2018-01-20 22:12:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:12,486 INFO L432 AbstractCegarLoop]: Abstraction has 406 states and 449 transitions. [2018-01-20 22:12:12,486 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-20 22:12:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 449 transitions. [2018-01-20 22:12:12,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-01-20 22:12:12,492 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:12,493 INFO L322 BasicCegarLoop]: trace histogram [114, 99, 99, 99, 99, 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 22:12:12,493 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:12,493 INFO L82 PathProgramCache]: Analyzing trace with hash 862237609, now seen corresponding path program 15 times [2018-01-20 22:12:12,494 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:12,494 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:12,494 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:12,495 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:12,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:12,561 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 28620 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 27855 trivial. 0 not checked. [2018-01-20 22:12:13,481 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:13,481 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 22:12:13,487 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:12:13,528 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,533 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,538 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,549 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,558 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,567 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,573 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,580 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,589 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,598 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,617 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:13,619 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:13,630 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 28620 backedges. 4638 proven. 198 refuted. 0 times theorem prover too weak. 23784 trivial. 0 not checked. [2018-01-20 22:12:14,155 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:14,155 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2018-01-20 22:12:14,156 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-20 22:12:14,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-20 22:12:14,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2018-01-20 22:12:14,156 INFO L87 Difference]: Start difference. First operand 406 states and 449 transitions. Second operand 29 states. [2018-01-20 22:12:14,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:14,810 INFO L93 Difference]: Finished difference Result 942 states and 1076 transitions. [2018-01-20 22:12:14,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-20 22:12:14,811 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 711 [2018-01-20 22:12:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:14,818 INFO L225 Difference]: With dead ends: 942 [2018-01-20 22:12:14,818 INFO L226 Difference]: Without dead ends: 930 [2018-01-20 22:12:14,820 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:12:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2018-01-20 22:12:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 477. [2018-01-20 22:12:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2018-01-20 22:12:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 537 transitions. [2018-01-20 22:12:14,871 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 537 transitions. Word has length 711 [2018-01-20 22:12:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:14,873 INFO L432 AbstractCegarLoop]: Abstraction has 477 states and 537 transitions. [2018-01-20 22:12:14,873 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-20 22:12:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 537 transitions. [2018-01-20 22:12:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2018-01-20 22:12:14,880 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:14,881 INFO L322 BasicCegarLoop]: trace histogram [131, 115, 115, 115, 115, 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 22:12:14,881 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:14,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1064194881, now seen corresponding path program 16 times [2018-01-20 22:12:14,881 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:14,881 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:14,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:14,882 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:14,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:14,944 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 38047 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 37175 trivial. 0 not checked. [2018-01-20 22:12:16,120 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:16,120 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 22:12:16,125 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:12:16,259 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:16,270 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 38047 backedges. 22212 proven. 245 refuted. 0 times theorem prover too weak. 15590 trivial. 0 not checked. [2018-01-20 22:12:17,183 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:17,184 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2018-01-20 22:12:17,184 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-20 22:12:17,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-20 22:12:17,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1394, Unknown=0, NotChecked=0, Total=1722 [2018-01-20 22:12:17,185 INFO L87 Difference]: Start difference. First operand 477 states and 537 transitions. Second operand 42 states. [2018-01-20 22:12:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:18,140 INFO L93 Difference]: Finished difference Result 1127 states and 1286 transitions. [2018-01-20 22:12:18,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-20 22:12:18,141 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 804 [2018-01-20 22:12:18,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:18,147 INFO L225 Difference]: With dead ends: 1127 [2018-01-20 22:12:18,147 INFO L226 Difference]: Without dead ends: 980 [2018-01-20 22:12:18,151 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=802, Invalid=3890, Unknown=0, NotChecked=0, Total=4692 [2018-01-20 22:12:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2018-01-20 22:12:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 545. [2018-01-20 22:12:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2018-01-20 22:12:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 609 transitions. [2018-01-20 22:12:18,218 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 609 transitions. Word has length 804 [2018-01-20 22:12:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:18,219 INFO L432 AbstractCegarLoop]: Abstraction has 545 states and 609 transitions. [2018-01-20 22:12:18,220 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-20 22:12:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 609 transitions. [2018-01-20 22:12:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2018-01-20 22:12:18,233 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:18,233 INFO L322 BasicCegarLoop]: trace histogram [148, 131, 131, 131, 131, 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 22:12:18,233 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1030594861, now seen corresponding path program 17 times [2018-01-20 22:12:18,234 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:18,234 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:18,235 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,235 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:18,235 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:18,318 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 48831 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 47845 trivial. 0 not checked. [2018-01-20 22:12:19,491 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:19,491 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 22:12:19,496 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:12:19,535 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,537 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,548 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,555 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,564 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,575 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,588 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,609 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,631 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,651 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,683 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,706 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:19,710 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:19,721 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 48831 backedges. 26528 proven. 889 refuted. 0 times theorem prover too weak. 21414 trivial. 0 not checked. [2018-01-20 22:12:20,557 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:20,557 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2018-01-20 22:12:20,558 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-01-20 22:12:20,558 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-01-20 22:12:20,558 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2018-01-20 22:12:20,558 INFO L87 Difference]: Start difference. First operand 545 states and 609 transitions. Second operand 43 states. [2018-01-20 22:12:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:21,793 INFO L93 Difference]: Finished difference Result 939 states and 1042 transitions. [2018-01-20 22:12:21,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-01-20 22:12:21,824 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 897 [2018-01-20 22:12:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:21,829 INFO L225 Difference]: With dead ends: 939 [2018-01-20 22:12:21,829 INFO L226 Difference]: Without dead ends: 784 [2018-01-20 22:12:21,833 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1061, Invalid=5911, Unknown=0, NotChecked=0, Total=6972 [2018-01-20 22:12:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2018-01-20 22:12:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 544. [2018-01-20 22:12:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-01-20 22:12:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 607 transitions. [2018-01-20 22:12:21,890 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 607 transitions. Word has length 897 [2018-01-20 22:12:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:21,891 INFO L432 AbstractCegarLoop]: Abstraction has 544 states and 607 transitions. [2018-01-20 22:12:21,892 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-01-20 22:12:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 607 transitions. [2018-01-20 22:12:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2018-01-20 22:12:21,902 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:21,902 INFO L322 BasicCegarLoop]: trace histogram [161, 143, 143, 143, 143, 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 22:12:21,902 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:21,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1035858959, now seen corresponding path program 18 times [2018-01-20 22:12:21,903 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:21,903 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:21,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:21,904 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:21,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:21,979 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 57938 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 56831 trivial. 0 not checked. [2018-01-20 22:12:23,329 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:23,329 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 22:12:23,333 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:12:23,375 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,378 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,382 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,383 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,387 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,390 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,394 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,407 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,414 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,423 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,434 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,444 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,459 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,466 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,477 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,496 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,528 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,540 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,569 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,616 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,648 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,678 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,717 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,782 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:23,786 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:23,800 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 57938 backedges. 8087 proven. 297 refuted. 0 times theorem prover too weak. 49554 trivial. 0 not checked. [2018-01-20 22:12:24,346 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:24,346 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 34 [2018-01-20 22:12:24,347 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-20 22:12:24,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-20 22:12:24,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=820, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:12:24,347 INFO L87 Difference]: Start difference. First operand 544 states and 607 transitions. Second operand 34 states. [2018-01-20 22:12:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:25,039 INFO L93 Difference]: Finished difference Result 1296 states and 1485 transitions. [2018-01-20 22:12:25,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-20 22:12:25,039 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 970 [2018-01-20 22:12:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:25,043 INFO L225 Difference]: With dead ends: 1296 [2018-01-20 22:12:25,044 INFO L226 Difference]: Without dead ends: 1284 [2018-01-20 22:12:25,045 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 958 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=482, Invalid=1588, Unknown=0, NotChecked=0, Total=2070 [2018-01-20 22:12:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2018-01-20 22:12:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 625. [2018-01-20 22:12:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-01-20 22:12:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 708 transitions. [2018-01-20 22:12:25,089 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 708 transitions. Word has length 970 [2018-01-20 22:12:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:25,089 INFO L432 AbstractCegarLoop]: Abstraction has 625 states and 708 transitions. [2018-01-20 22:12:25,089 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-20 22:12:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 708 transitions. [2018-01-20 22:12:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2018-01-20 22:12:25,097 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:25,098 INFO L322 BasicCegarLoop]: trace histogram [181, 162, 162, 162, 162, 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 22:12:25,098 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:25,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1745825279, now seen corresponding path program 19 times [2018-01-20 22:12:25,098 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:25,098 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:25,099 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:25,099 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:25,099 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:25,155 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 73622 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 72387 trivial. 0 not checked. [2018-01-20 22:12:26,846 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:26,846 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 22:12:26,851 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:27,026 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 73622 backedges. 42098 proven. 354 refuted. 0 times theorem prover too weak. 31170 trivial. 0 not checked. [2018-01-20 22:12:27,854 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:27,854 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 49 [2018-01-20 22:12:27,855 INFO L409 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-01-20 22:12:27,855 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-01-20 22:12:27,855 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1910, Unknown=0, NotChecked=0, Total=2352 [2018-01-20 22:12:27,855 INFO L87 Difference]: Start difference. First operand 625 states and 708 transitions. Second operand 49 states. [2018-01-20 22:12:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:28,845 INFO L93 Difference]: Finished difference Result 1489 states and 1700 transitions. [2018-01-20 22:12:28,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-01-20 22:12:28,845 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 1078 [2018-01-20 22:12:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:28,852 INFO L225 Difference]: With dead ends: 1489 [2018-01-20 22:12:28,852 INFO L226 Difference]: Without dead ends: 1319 [2018-01-20 22:12:28,856 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 1052 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1087, Invalid=5393, Unknown=0, NotChecked=0, Total=6480 [2018-01-20 22:12:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2018-01-20 22:12:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 703. [2018-01-20 22:12:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-01-20 22:12:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 791 transitions. [2018-01-20 22:12:28,933 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 791 transitions. Word has length 1078 [2018-01-20 22:12:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:28,934 INFO L432 AbstractCegarLoop]: Abstraction has 703 states and 791 transitions. [2018-01-20 22:12:28,934 INFO L433 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-01-20 22:12:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 791 transitions. [2018-01-20 22:12:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1187 [2018-01-20 22:12:28,948 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:28,949 INFO L322 BasicCegarLoop]: trace histogram [201, 181, 181, 181, 181, 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 22:12:28,949 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1689447187, now seen corresponding path program 20 times [2018-01-20 22:12:28,949 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:28,949 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:28,950 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:28,950 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:28,950 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:29,035 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 91200 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 89830 trivial. 0 not checked. [2018-01-20 22:12:31,072 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:31,072 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:12:31,090 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:12:31,140 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,254 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:12:31,276 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:31,287 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 91200 backedges. 49529 proven. 297 refuted. 0 times theorem prover too weak. 41374 trivial. 0 not checked. [2018-01-20 22:12:32,106 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:32,107 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 48 [2018-01-20 22:12:32,107 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-20 22:12:32,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-20 22:12:32,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2018-01-20 22:12:32,108 INFO L87 Difference]: Start difference. First operand 703 states and 791 transitions. Second operand 48 states. [2018-01-20 22:12:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:33,103 INFO L93 Difference]: Finished difference Result 1358 states and 1512 transitions. [2018-01-20 22:12:33,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-01-20 22:12:33,104 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 1186 [2018-01-20 22:12:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:33,107 INFO L225 Difference]: With dead ends: 1358 [2018-01-20 22:12:33,107 INFO L226 Difference]: Without dead ends: 1180 [2018-01-20 22:12:33,109 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1162 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1096, Invalid=5224, Unknown=0, NotChecked=0, Total=6320 [2018-01-20 22:12:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2018-01-20 22:12:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 702. [2018-01-20 22:12:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2018-01-20 22:12:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 789 transitions. [2018-01-20 22:12:33,185 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 789 transitions. Word has length 1186 [2018-01-20 22:12:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:33,186 INFO L432 AbstractCegarLoop]: Abstraction has 702 states and 789 transitions. [2018-01-20 22:12:33,186 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-20 22:12:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 789 transitions. [2018-01-20 22:12:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1270 [2018-01-20 22:12:33,201 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:33,202 INFO L322 BasicCegarLoop]: trace histogram [216, 195, 195, 195, 195, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:12:33,202 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash -675523539, now seen corresponding path program 21 times [2018-01-20 22:12:33,202 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:33,203 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:33,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:33,203 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:33,204 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:33,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 105537 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 104025 trivial. 0 not checked. [2018-01-20 22:12:35,708 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:35,708 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:12:35,713 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:12:35,764 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,767 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,770 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,774 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,779 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,786 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,791 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,798 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,804 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,815 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,827 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,857 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,876 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,918 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,955 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:12:35,959 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:35,971 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 105537 backedges. 12936 proven. 416 refuted. 0 times theorem prover too weak. 92185 trivial. 0 not checked. [2018-01-20 22:12:36,734 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:36,734 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 39 [2018-01-20 22:12:36,735 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-20 22:12:36,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-20 22:12:36,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:12:36,736 INFO L87 Difference]: Start difference. First operand 702 states and 789 transitions. Second operand 39 states. Received shutdown request... [2018-01-20 22:12:36,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 22:12:36,870 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:12:36,872 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:12:36,873 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:12:36,873 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:12:36,873 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:12:36,873 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:12:36,873 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:12:36,873 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:12:36,873 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 22:12:36,873 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:12:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-20 22:12:36,875 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:12:36,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 10:12:36 BoogieIcfgContainer [2018-01-20 22:12:36,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 22:12:36,877 INFO L168 Benchmark]: Toolchain (without parser) took 41732.35 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 266.0 MB in the beginning and 1.1 GB in the end (delta: -813.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 5.3 GB. [2018-01-20 22:12:36,879 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 306.7 MB. Free memory is still 271.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 22:12:36,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.21 ms. Allocated memory is still 306.7 MB. Free memory was 266.0 MB in the beginning and 256.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. [2018-01-20 22:12:36,880 INFO L168 Benchmark]: Boogie Preprocessor took 29.97 ms. Allocated memory is still 306.7 MB. Free memory was 256.9 MB in the beginning and 255.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-20 22:12:36,880 INFO L168 Benchmark]: RCFGBuilder took 259.01 ms. Allocated memory is still 306.7 MB. Free memory was 255.9 MB in the beginning and 240.1 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 5.3 GB. [2018-01-20 22:12:36,880 INFO L168 Benchmark]: TraceAbstraction took 41261.36 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 240.1 MB in the beginning and 1.1 GB in the end (delta: -839.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 5.3 GB. [2018-01-20 22:12:36,883 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 306.7 MB. Free memory is still 271.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 175.21 ms. Allocated memory is still 306.7 MB. Free memory was 266.0 MB in the beginning and 256.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 29.97 ms. Allocated memory is still 306.7 MB. Free memory was 256.9 MB in the beginning and 255.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 259.01 ms. Allocated memory is still 306.7 MB. Free memory was 255.9 MB in the beginning and 240.1 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 41261.36 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 240.1 MB in the beginning and 1.1 GB in the end (delta: -839.5 MB). Peak memory consumption was 1.1 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, 43 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=43occurred 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, 43 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 45 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=43occurred 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 - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was constructing difference of abstraction (702states) and interpolant automaton (currently 7 states, 39 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 41 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. TIMEOUT Result, 40.7s OverallTime, 24 OverallIterations, 216 TraceHistogramMax, 12.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 989 SDtfs, 3910 SDslu, 9918 SDs, 0 SdLazy, 11524 SolverSat, 1361 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11395 GetRequests, 10568 SyntacticMatches, 0 SemanticMatches, 826 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9373 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=703occurred in iteration=22, 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: 0.6s AutomataMinimizationTime, 23 MinimizatonAttempts, 4423 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 20.7s InterpolantComputationTime, 21668 NumberOfCodeBlocks, 18905 NumberOfCodeBlocksAsserted, 151 NumberOfCheckSat, 21623 ConstructedInterpolants, 0 QuantifiedInterpolants, 23719410 SizeOfPredicates, 66 NumberOfNonLiveVariables, 14602 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 45 InterpolantComputations, 4 PerfectInterpolantSequences, 1028875/1043868 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 20). Cancelled while IsEmpty was searching accepting run (input had 43 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_22-12-36-892.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_22-12-36-892.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_22-12-36-892.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_22-12-36-892.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_22-12-36-892.csv Completed graceful shutdown