java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_false-valid-deref-write.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:38:22,250 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:38:22,280 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:38:22,296 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:38:22,297 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:38:22,298 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:38:22,299 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:38:22,301 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:38:22,303 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:38:22,304 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:38:22,305 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:38:22,305 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:38:22,306 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:38:22,307 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:38:22,307 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:38:22,310 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:38:22,313 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:38:22,315 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:38:22,317 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:38:22,318 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:38:22,321 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 14:38:22,326 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:38:22,327 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:38:22,327 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 [2018-01-23 14:38:22,338 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:38:22,338 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:38:22,339 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:38:22,339 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:38:22,339 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:38:22,339 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:38:22,340 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:38:22,340 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:38:22,341 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:38:22,341 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:38:22,341 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:38:22,341 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:38:22,341 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:38:22,342 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:38:22,342 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:38:22,342 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:38:22,342 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:38:22,342 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:38:22,342 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:38:22,343 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:38:22,343 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:38:22,343 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:38:22,343 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:38:22,343 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:38:22,344 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:38:22,344 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:38:22,344 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:38:22,344 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:38:22,344 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:38:22,345 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:38:22,345 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:38:22,345 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:38:22,345 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:38:22,345 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:38:22,345 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:38:22,346 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:38:22,347 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:38:22,383 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:38:22,397 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:38:22,401 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:38:22,403 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:38:22,403 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:38:22,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_false-valid-deref-write.c [2018-01-23 14:38:22,531 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:38:22,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:38:22,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:38:22,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:38:22,543 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:38:22,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:38:22" (1/1) ... [2018-01-23 14:38:22,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27745bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22, skipping insertion in model container [2018-01-23 14:38:22,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:38:22" (1/1) ... [2018-01-23 14:38:22,562 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:38:22,578 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:38:22,697 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:38:22,715 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:38:22,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22 WrapperNode [2018-01-23 14:38:22,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:38:22,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:38:22,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:38:22,723 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:38:22,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22" (1/1) ... [2018-01-23 14:38:22,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22" (1/1) ... [2018-01-23 14:38:22,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22" (1/1) ... [2018-01-23 14:38:22,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22" (1/1) ... [2018-01-23 14:38:22,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22" (1/1) ... [2018-01-23 14:38:22,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22" (1/1) ... [2018-01-23 14:38:22,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22" (1/1) ... [2018-01-23 14:38:22,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:38:22,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:38:22,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:38:22,754 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:38:22,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22" (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 [2018-01-23 14:38:22,807 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:38:22,808 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:38:22,808 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-23 14:38:22,808 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:38:22,808 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:38:22,808 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:38:22,809 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:38:22,809 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:38:22,809 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:38:22,809 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-23 14:38:22,809 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:38:22,809 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:38:22,810 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:38:22,990 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:38:22,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:38:22 BoogieIcfgContainer [2018-01-23 14:38:22,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:38:22,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:38:22,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:38:22,994 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:38:22,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:38:22" (1/3) ... [2018-01-23 14:38:22,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7d4714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:38:22, skipping insertion in model container [2018-01-23 14:38:22,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:38:22" (2/3) ... [2018-01-23 14:38:22,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7d4714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:38:22, skipping insertion in model container [2018-01-23 14:38:22,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:38:22" (3/3) ... [2018-01-23 14:38:22,997 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_false-valid-deref-write.c [2018-01-23 14:38:23,006 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:38:23,013 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:38:23,058 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:38:23,059 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:38:23,059 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:38:23,059 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:38:23,059 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:38:23,059 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:38:23,060 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:38:23,060 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:38:23,061 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:38:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-01-23 14:38:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:38:23,084 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:23,085 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:38:23,085 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:38:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash 103790, now seen corresponding path program 1 times [2018-01-23 14:38:23,094 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:23,095 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:23,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,143 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:23,143 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:38:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:38:23,199 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:38:23,206 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:38:23,211 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:38:23,212 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:38:23,212 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:38:23,212 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:38:23,212 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:38:23,212 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:38:23,212 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:38:23,212 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-23 14:38:23,212 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:38:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-01-23 14:38:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-23 14:38:23,215 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:23,215 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:23,215 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-23 14:38:23,215 INFO L82 PathProgramCache]: Analyzing trace with hash -125735921, now seen corresponding path program 1 times [2018-01-23 14:38:23,215 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:23,216 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:23,217 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,217 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:23,217 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:23,246 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:38:23,275 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:38:23,276 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:38:23,277 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:38:23,287 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:38:23,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:38:23,290 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2018-01-23 14:38:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:23,311 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-01-23 14:38:23,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:38:23,312 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-23 14:38:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:23,322 INFO L225 Difference]: With dead ends: 78 [2018-01-23 14:38:23,322 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:38:23,326 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 [2018-01-23 14:38:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:38:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:38:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:38:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:38:23,421 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-23 14:38:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:23,421 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:38:23,421 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:38:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:38:23,422 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:38:23,425 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:38:23,425 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:38:23,425 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:38:23,425 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:38:23,426 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:38:23,426 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:38:23,426 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:38:23,426 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:38:23,426 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:38:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-01-23 14:38:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:38:23,429 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:23,430 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:23,430 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:23,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1491711838, now seen corresponding path program 1 times [2018-01-23 14:38:23,430 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:23,430 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:23,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,432 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:23,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:23,441 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:38:23,454 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:38:23,455 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:38:23,455 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:38:23,455 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:38:23,455 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:38:23,456 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2018-01-23 14:38:23,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:23,460 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-01-23 14:38:23,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:38:23,461 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-23 14:38:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:23,462 INFO L225 Difference]: With dead ends: 78 [2018-01-23 14:38:23,463 INFO L226 Difference]: Without dead ends: 40 [2018-01-23 14:38:23,463 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 [2018-01-23 14:38:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-23 14:38:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-23 14:38:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-23 14:38:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-01-23 14:38:23,474 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 17 [2018-01-23 14:38:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:23,475 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-01-23 14:38:23,475 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:38:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-01-23 14:38:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:38:23,475 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:23,476 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:23,476 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:23,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1603848178, now seen corresponding path program 1 times [2018-01-23 14:38:23,476 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:23,476 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:23,477 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,477 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:23,477 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:23,489 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:38:23,531 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:38:23,531 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:38:23,533 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:38:23,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:38:23,534 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:38:23,534 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 3 states. [2018-01-23 14:38:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:23,583 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2018-01-23 14:38:23,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:38:23,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-23 14:38:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:23,586 INFO L225 Difference]: With dead ends: 73 [2018-01-23 14:38:23,587 INFO L226 Difference]: Without dead ends: 57 [2018-01-23 14:38:23,587 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 [2018-01-23 14:38:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-23 14:38:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-01-23 14:38:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-23 14:38:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-01-23 14:38:23,602 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 19 [2018-01-23 14:38:23,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:23,602 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-01-23 14:38:23,603 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:38:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-01-23 14:38:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-23 14:38:23,604 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:23,604 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] [2018-01-23 14:38:23,604 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash -428436962, now seen corresponding path program 1 times [2018-01-23 14:38:23,605 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:23,605 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:23,606 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,606 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:23,606 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:23,629 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:38:23,695 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:23,695 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 [2018-01-23 14:38:23,705 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:23,741 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:38:23,861 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-23 14:38:23,861 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2018-01-23 14:38:23,862 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-23 14:38:23,862 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-23 14:38:23,862 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:38:23,863 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 7 states. [2018-01-23 14:38:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:24,045 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2018-01-23 14:38:24,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-23 14:38:24,045 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2018-01-23 14:38:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:24,047 INFO L225 Difference]: With dead ends: 116 [2018-01-23 14:38:24,047 INFO L226 Difference]: Without dead ends: 79 [2018-01-23 14:38:24,048 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:38:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-23 14:38:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2018-01-23 14:38:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-23 14:38:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-01-23 14:38:24,058 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 34 [2018-01-23 14:38:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:24,058 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-01-23 14:38:24,058 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-23 14:38:24,059 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-01-23 14:38:24,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-23 14:38:24,061 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:24,061 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:24,061 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1575876768, now seen corresponding path program 1 times [2018-01-23 14:38:24,062 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:24,062 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:24,063 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:24,064 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:24,064 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:24,095 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-01-23 14:38:24,162 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:24,162 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 [2018-01-23 14:38:24,174 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:24,204 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-23 14:38:24,277 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:24,277 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-01-23 14:38:24,277 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:38:24,278 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:38:24,278 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:38:24,278 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 10 states. [2018-01-23 14:38:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:24,644 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2018-01-23 14:38:24,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:38:24,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2018-01-23 14:38:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:24,647 INFO L225 Difference]: With dead ends: 164 [2018-01-23 14:38:24,647 INFO L226 Difference]: Without dead ends: 123 [2018-01-23 14:38:24,648 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:38:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-23 14:38:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 86. [2018-01-23 14:38:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-23 14:38:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2018-01-23 14:38:24,659 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 57 [2018-01-23 14:38:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:24,659 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2018-01-23 14:38:24,659 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:38:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2018-01-23 14:38:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-01-23 14:38:24,661 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:24,661 INFO L322 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:24,661 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1577101506, now seen corresponding path program 2 times [2018-01-23 14:38:24,661 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:24,661 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:24,662 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:24,662 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:24,662 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:24,698 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-23 14:38:24,798 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:24,798 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 [2018-01-23 14:38:24,820 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:38:24,835 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:24,850 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:24,853 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:24,858 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-23 14:38:24,996 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:24,996 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2018-01-23 14:38:24,996 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-23 14:38:24,997 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-23 14:38:24,997 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:38:24,997 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 13 states. [2018-01-23 14:38:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:25,269 INFO L93 Difference]: Finished difference Result 234 states and 261 transitions. [2018-01-23 14:38:25,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:38:25,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2018-01-23 14:38:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:25,272 INFO L225 Difference]: With dead ends: 234 [2018-01-23 14:38:25,272 INFO L226 Difference]: Without dead ends: 180 [2018-01-23 14:38:25,273 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:38:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-01-23 14:38:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2018-01-23 14:38:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-23 14:38:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2018-01-23 14:38:25,289 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 85 [2018-01-23 14:38:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:25,290 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2018-01-23 14:38:25,290 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-23 14:38:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2018-01-23 14:38:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-01-23 14:38:25,293 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:25,293 INFO L322 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:25,293 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:25,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1501628352, now seen corresponding path program 3 times [2018-01-23 14:38:25,294 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:25,294 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:25,295 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:25,295 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:25,295 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:25,326 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-23 14:38:25,460 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:25,460 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 [2018-01-23 14:38:25,468 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:38:25,487 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:25,491 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:25,497 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:25,505 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:25,513 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:25,515 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:25,522 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 155 proven. 21 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-01-23 14:38:25,748 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:25,748 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2018-01-23 14:38:25,749 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-23 14:38:25,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-23 14:38:25,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:38:25,750 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 12 states. [2018-01-23 14:38:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:25,959 INFO L93 Difference]: Finished difference Result 289 states and 324 transitions. [2018-01-23 14:38:25,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:38:25,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 118 [2018-01-23 14:38:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:25,962 INFO L225 Difference]: With dead ends: 289 [2018-01-23 14:38:25,962 INFO L226 Difference]: Without dead ends: 256 [2018-01-23 14:38:25,963 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:38:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-01-23 14:38:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2018-01-23 14:38:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-01-23 14:38:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 185 transitions. [2018-01-23 14:38:25,981 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 185 transitions. Word has length 118 [2018-01-23 14:38:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:25,982 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 185 transitions. [2018-01-23 14:38:25,982 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-23 14:38:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 185 transitions. [2018-01-23 14:38:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-01-23 14:38:25,984 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:25,984 INFO L322 BasicCegarLoop]: trace histogram [19, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:25,984 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:25,984 INFO L82 PathProgramCache]: Analyzing trace with hash -405146722, now seen corresponding path program 4 times [2018-01-23 14:38:25,984 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:25,985 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:25,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:25,985 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:25,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:26,021 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2018-01-23 14:38:26,182 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:26,182 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 [2018-01-23 14:38:26,190 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:38:26,239 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:26,246 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 352 proven. 38 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-01-23 14:38:26,466 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:26,467 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 19 [2018-01-23 14:38:26,467 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-23 14:38:26,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-23 14:38:26,467 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:38:26,468 INFO L87 Difference]: Start difference. First operand 165 states and 185 transitions. Second operand 19 states. [2018-01-23 14:38:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:26,863 INFO L93 Difference]: Finished difference Result 439 states and 496 transitions. [2018-01-23 14:38:26,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:38:26,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 156 [2018-01-23 14:38:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:26,866 INFO L225 Difference]: With dead ends: 439 [2018-01-23 14:38:26,866 INFO L226 Difference]: Without dead ends: 346 [2018-01-23 14:38:26,868 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:38:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-01-23 14:38:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 208. [2018-01-23 14:38:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-01-23 14:38:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 233 transitions. [2018-01-23 14:38:26,887 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 233 transitions. Word has length 156 [2018-01-23 14:38:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:26,887 INFO L432 AbstractCegarLoop]: Abstraction has 208 states and 233 transitions. [2018-01-23 14:38:26,887 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-23 14:38:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 233 transitions. [2018-01-23 14:38:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-01-23 14:38:26,891 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:26,891 INFO L322 BasicCegarLoop]: trace histogram [25, 19, 19, 19, 19, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:26,891 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:26,892 INFO L82 PathProgramCache]: Analyzing trace with hash 894023172, now seen corresponding path program 5 times [2018-01-23 14:38:26,892 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:26,892 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:26,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:26,893 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:26,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:26,931 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1173 trivial. 0 not checked. [2018-01-23 14:38:27,130 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:27,130 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 [2018-01-23 14:38:27,143 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:38:27,164 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:27,167 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:27,172 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:27,176 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:27,179 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:27,185 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:27,190 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:27,198 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:27,205 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:27,206 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:27,211 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 822 proven. 118 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-01-23 14:38:27,376 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:27,391 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2018-01-23 14:38:27,392 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:38:27,392 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:38:27,392 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:38:27,392 INFO L87 Difference]: Start difference. First operand 208 states and 233 transitions. Second operand 20 states. [2018-01-23 14:38:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:28,195 INFO L93 Difference]: Finished difference Result 479 states and 536 transitions. [2018-01-23 14:38:28,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:38:28,195 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 194 [2018-01-23 14:38:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:28,197 INFO L225 Difference]: With dead ends: 479 [2018-01-23 14:38:28,198 INFO L226 Difference]: Without dead ends: 274 [2018-01-23 14:38:28,199 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:38:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-01-23 14:38:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 212. [2018-01-23 14:38:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-01-23 14:38:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 232 transitions. [2018-01-23 14:38:28,225 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 232 transitions. Word has length 194 [2018-01-23 14:38:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:28,225 INFO L432 AbstractCegarLoop]: Abstraction has 212 states and 232 transitions. [2018-01-23 14:38:28,226 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:38:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 232 transitions. [2018-01-23 14:38:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-01-23 14:38:28,229 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:28,229 INFO L322 BasicCegarLoop]: trace histogram [32, 25, 25, 25, 25, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:28,229 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:28,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1111921858, now seen corresponding path program 6 times [2018-01-23 14:38:28,229 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:28,229 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:28,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:28,230 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:28,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:28,270 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2137 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1976 trivial. 0 not checked. [2018-01-23 14:38:28,452 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:28,452 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 [2018-01-23 14:38:28,459 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:38:28,477 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,479 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,483 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,486 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,491 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,498 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,507 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,516 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,538 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,547 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:28,549 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:28,556 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2137 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1976 trivial. 0 not checked. [2018-01-23 14:38:28,638 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:28,638 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-23 14:38:28,639 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-23 14:38:28,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-23 14:38:28,639 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:38:28,639 INFO L87 Difference]: Start difference. First operand 212 states and 232 transitions. Second operand 11 states. [2018-01-23 14:38:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:28,802 INFO L93 Difference]: Finished difference Result 320 states and 353 transitions. [2018-01-23 14:38:28,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:38:28,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 237 [2018-01-23 14:38:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:28,804 INFO L225 Difference]: With dead ends: 320 [2018-01-23 14:38:28,804 INFO L226 Difference]: Without dead ends: 272 [2018-01-23 14:38:28,805 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:38:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-01-23 14:38:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 224. [2018-01-23 14:38:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-01-23 14:38:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 246 transitions. [2018-01-23 14:38:28,824 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 246 transitions. Word has length 237 [2018-01-23 14:38:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:28,825 INFO L432 AbstractCegarLoop]: Abstraction has 224 states and 246 transitions. [2018-01-23 14:38:28,825 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-23 14:38:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 246 transitions. [2018-01-23 14:38:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-01-23 14:38:28,829 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:28,830 INFO L322 BasicCegarLoop]: trace histogram [38, 30, 30, 30, 30, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:28,830 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1579608284, now seen corresponding path program 7 times [2018-01-23 14:38:28,830 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:28,830 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:28,831 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:28,831 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:28,831 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:28,871 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2018-01-23 14:38:29,104 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:29,104 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 [2018-01-23 14:38:29,109 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:29,164 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 1945 proven. 60 refuted. 0 times theorem prover too weak. 1030 trivial. 0 not checked. [2018-01-23 14:38:29,400 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:29,400 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2018-01-23 14:38:29,401 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:38:29,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:38:29,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:38:29,402 INFO L87 Difference]: Start difference. First operand 224 states and 246 transitions. Second operand 24 states. [2018-01-23 14:38:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:29,903 INFO L93 Difference]: Finished difference Result 533 states and 591 transitions. [2018-01-23 14:38:29,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:38:29,903 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 275 [2018-01-23 14:38:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:29,906 INFO L225 Difference]: With dead ends: 533 [2018-01-23 14:38:29,907 INFO L226 Difference]: Without dead ends: 420 [2018-01-23 14:38:29,908 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:38:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2018-01-23 14:38:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 272. [2018-01-23 14:38:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-01-23 14:38:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 300 transitions. [2018-01-23 14:38:29,930 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 300 transitions. Word has length 275 [2018-01-23 14:38:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:29,931 INFO L432 AbstractCegarLoop]: Abstraction has 272 states and 300 transitions. [2018-01-23 14:38:29,931 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:38:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 300 transitions. [2018-01-23 14:38:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-01-23 14:38:29,934 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:29,935 INFO L322 BasicCegarLoop]: trace histogram [48, 39, 39, 39, 39, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:29,935 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1321832962, now seen corresponding path program 8 times [2018-01-23 14:38:29,935 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:29,935 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:29,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:29,936 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:29,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:29,994 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4893 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 4623 trivial. 0 not checked. [2018-01-23 14:38:30,279 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:30,279 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 [2018-01-23 14:38:30,286 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:38:30,311 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:30,353 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:30,364 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:30,374 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4893 backedges. 3005 proven. 87 refuted. 0 times theorem prover too weak. 1801 trivial. 0 not checked. [2018-01-23 14:38:30,645 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:30,645 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2018-01-23 14:38:30,646 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-23 14:38:30,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-23 14:38:30,646 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:38:30,646 INFO L87 Difference]: Start difference. First operand 272 states and 300 transitions. Second operand 27 states. [2018-01-23 14:38:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:31,713 INFO L93 Difference]: Finished difference Result 647 states and 718 transitions. [2018-01-23 14:38:31,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:38:31,713 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 333 [2018-01-23 14:38:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:31,718 INFO L225 Difference]: With dead ends: 647 [2018-01-23 14:38:31,718 INFO L226 Difference]: Without dead ends: 521 [2018-01-23 14:38:31,719 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:38:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2018-01-23 14:38:31,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 325. [2018-01-23 14:38:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-01-23 14:38:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 360 transitions. [2018-01-23 14:38:31,744 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 360 transitions. Word has length 333 [2018-01-23 14:38:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:31,744 INFO L432 AbstractCegarLoop]: Abstraction has 325 states and 360 transitions. [2018-01-23 14:38:31,744 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-23 14:38:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 360 transitions. [2018-01-23 14:38:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-01-23 14:38:31,747 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:31,748 INFO L322 BasicCegarLoop]: trace histogram [59, 49, 49, 49, 49, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:31,748 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash -626287868, now seen corresponding path program 9 times [2018-01-23 14:38:31,748 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:31,748 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:31,749 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:31,749 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:31,749 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:31,797 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7465 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 7130 trivial. 0 not checked. [2018-01-23 14:38:32,174 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:32,174 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 [2018-01-23 14:38:32,179 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:38:32,205 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:32,209 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:32,212 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:32,217 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:32,223 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:32,229 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:32,235 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:32,242 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:32,249 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:32,250 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:32,256 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7465 backedges. 1781 proven. 119 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2018-01-23 14:38:32,482 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:32,491 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-01-23 14:38:32,492 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:38:32,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:38:32,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:38:32,493 INFO L87 Difference]: Start difference. First operand 325 states and 360 transitions. Second operand 22 states. [2018-01-23 14:38:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:33,133 INFO L93 Difference]: Finished difference Result 737 states and 829 transitions. [2018-01-23 14:38:33,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-23 14:38:33,133 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 396 [2018-01-23 14:38:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:33,138 INFO L225 Difference]: With dead ends: 737 [2018-01-23 14:38:33,138 INFO L226 Difference]: Without dead ends: 674 [2018-01-23 14:38:33,140 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:38:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2018-01-23 14:38:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 391. [2018-01-23 14:38:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-01-23 14:38:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 439 transitions. [2018-01-23 14:38:33,171 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 439 transitions. Word has length 396 [2018-01-23 14:38:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:33,172 INFO L432 AbstractCegarLoop]: Abstraction has 391 states and 439 transitions. [2018-01-23 14:38:33,172 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:38:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 439 transitions. [2018-01-23 14:38:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-01-23 14:38:33,176 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:33,177 INFO L322 BasicCegarLoop]: trace histogram [71, 60, 60, 60, 60, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:33,177 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:33,177 INFO L82 PathProgramCache]: Analyzing trace with hash -307953698, now seen corresponding path program 10 times [2018-01-23 14:38:33,177 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:33,178 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:33,178 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:33,179 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:33,179 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:33,235 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10907 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 10500 trivial. 0 not checked. [2018-01-23 14:38:33,733 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:33,733 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 [2018-01-23 14:38:33,739 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:38:33,856 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:33,869 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10907 backedges. 6160 proven. 156 refuted. 0 times theorem prover too weak. 4591 trivial. 0 not checked. [2018-01-23 14:38:34,398 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:34,398 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2018-01-23 14:38:34,399 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-23 14:38:34,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-23 14:38:34,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:38:34,399 INFO L87 Difference]: Start difference. First operand 391 states and 439 transitions. Second operand 33 states. [2018-01-23 14:38:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:35,717 INFO L93 Difference]: Finished difference Result 955 states and 1079 transitions. [2018-01-23 14:38:35,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-23 14:38:35,717 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 464 [2018-01-23 14:38:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:35,723 INFO L225 Difference]: With dead ends: 955 [2018-01-23 14:38:35,723 INFO L226 Difference]: Without dead ends: 789 [2018-01-23 14:38:35,726 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:38:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2018-01-23 14:38:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 454. [2018-01-23 14:38:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2018-01-23 14:38:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 508 transitions. [2018-01-23 14:38:35,764 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 508 transitions. Word has length 464 [2018-01-23 14:38:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:35,765 INFO L432 AbstractCegarLoop]: Abstraction has 454 states and 508 transitions. [2018-01-23 14:38:35,766 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-23 14:38:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 508 transitions. [2018-01-23 14:38:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2018-01-23 14:38:35,772 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:35,772 INFO L322 BasicCegarLoop]: trace histogram [83, 71, 71, 71, 71, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:35,772 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1759665720, now seen corresponding path program 11 times [2018-01-23 14:38:35,773 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:35,773 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:35,774 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:35,774 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:35,774 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:35,840 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15011 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 14525 trivial. 0 not checked. [2018-01-23 14:38:36,628 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:36,628 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 [2018-01-23 14:38:36,639 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:38:36,685 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:36,691 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:36,701 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:36,712 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:36,724 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:36,741 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:36,756 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:36,773 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:36,792 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:36,796 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:36,812 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15011 backedges. 8864 proven. 564 refuted. 0 times theorem prover too weak. 5583 trivial. 0 not checked. [2018-01-23 14:38:37,378 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:37,378 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 34 [2018-01-23 14:38:37,379 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:38:37,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:38:37,379 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:38:37,379 INFO L87 Difference]: Start difference. First operand 454 states and 508 transitions. Second operand 34 states. [2018-01-23 14:38:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:38,469 INFO L93 Difference]: Finished difference Result 841 states and 933 transitions. [2018-01-23 14:38:38,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-23 14:38:38,469 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 532 [2018-01-23 14:38:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:38,473 INFO L225 Difference]: With dead ends: 841 [2018-01-23 14:38:38,473 INFO L226 Difference]: Without dead ends: 662 [2018-01-23 14:38:38,475 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=3631, Unknown=0, NotChecked=0, Total=4290 [2018-01-23 14:38:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2018-01-23 14:38:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 458. [2018-01-23 14:38:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2018-01-23 14:38:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 512 transitions. [2018-01-23 14:38:38,497 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 512 transitions. Word has length 532 [2018-01-23 14:38:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:38,498 INFO L432 AbstractCegarLoop]: Abstraction has 458 states and 512 transitions. [2018-01-23 14:38:38,498 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:38:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 512 transitions. [2018-01-23 14:38:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2018-01-23 14:38:38,501 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:38,501 INFO L322 BasicCegarLoop]: trace histogram [94, 81, 81, 81, 81, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:38,501 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash 835853446, now seen corresponding path program 12 times [2018-01-23 14:38:38,502 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:38,502 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:38,502 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:38,502 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:38,503 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:38,547 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19346 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 18774 trivial. 0 not checked. [2018-01-23 14:38:39,473 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:39,474 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 [2018-01-23 14:38:39,481 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:38:39,527 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,534 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,540 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,548 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,556 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,568 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,581 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,599 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,633 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,663 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,697 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,723 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,752 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,770 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,800 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,826 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,895 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:39,916 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:40,004 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:40,025 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:40,072 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:40,075 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:40,085 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 19346 backedges. 3734 proven. 198 refuted. 0 times theorem prover too weak. 15414 trivial. 0 not checked. [2018-01-23 14:38:40,722 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:40,722 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2018-01-23 14:38:40,724 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-23 14:38:40,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-23 14:38:40,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:38:40,724 INFO L87 Difference]: Start difference. First operand 458 states and 512 transitions. Second operand 27 states. [2018-01-23 14:38:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:41,354 INFO L93 Difference]: Finished difference Result 1063 states and 1202 transitions. [2018-01-23 14:38:41,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-23 14:38:41,354 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 595 [2018-01-23 14:38:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:41,362 INFO L225 Difference]: With dead ends: 1063 [2018-01-23 14:38:41,362 INFO L226 Difference]: Without dead ends: 985 [2018-01-23 14:38:41,364 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:38:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2018-01-23 14:38:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 534. [2018-01-23 14:38:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2018-01-23 14:38:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 604 transitions. [2018-01-23 14:38:41,409 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 604 transitions. Word has length 595 [2018-01-23 14:38:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:41,411 INFO L432 AbstractCegarLoop]: Abstraction has 534 states and 604 transitions. [2018-01-23 14:38:41,411 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-23 14:38:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 604 transitions. [2018-01-23 14:38:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2018-01-23 14:38:41,417 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:41,417 INFO L322 BasicCegarLoop]: trace histogram [109, 95, 95, 95, 95, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:41,417 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2131540612, now seen corresponding path program 13 times [2018-01-23 14:38:41,418 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:41,418 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:41,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:41,419 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:41,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:41,485 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 26196 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 25531 trivial. 0 not checked. [2018-01-23 14:38:42,653 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:42,653 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 [2018-01-23 14:38:42,659 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:42,806 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 26196 backedges. 14734 proven. 245 refuted. 0 times theorem prover too weak. 11217 trivial. 0 not checked. [2018-01-23 14:38:43,443 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:43,444 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25] total 40 [2018-01-23 14:38:43,445 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:38:43,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:38:43,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:38:43,446 INFO L87 Difference]: Start difference. First operand 534 states and 604 transitions. Second operand 40 states. [2018-01-23 14:38:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:44,540 INFO L93 Difference]: Finished difference Result 1310 states and 1484 transitions. [2018-01-23 14:38:44,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-23 14:38:44,540 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 678 [2018-01-23 14:38:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:44,545 INFO L225 Difference]: With dead ends: 1310 [2018-01-23 14:38:44,545 INFO L226 Difference]: Without dead ends: 1106 [2018-01-23 14:38:44,548 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=699, Invalid=3461, Unknown=0, NotChecked=0, Total=4160 [2018-01-23 14:38:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2018-01-23 14:38:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 607. [2018-01-23 14:38:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-01-23 14:38:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 684 transitions. [2018-01-23 14:38:44,599 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 684 transitions. Word has length 678 [2018-01-23 14:38:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:44,600 INFO L432 AbstractCegarLoop]: Abstraction has 607 states and 684 transitions. [2018-01-23 14:38:44,600 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:38:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 684 transitions. [2018-01-23 14:38:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2018-01-23 14:38:44,607 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:44,608 INFO L322 BasicCegarLoop]: trace histogram [124, 109, 109, 109, 109, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:44,608 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:44,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2137681098, now seen corresponding path program 14 times [2018-01-23 14:38:44,609 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:44,609 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:44,609 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:44,610 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:44,610 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:44,682 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34095 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 33330 trivial. 0 not checked. [2018-01-23 14:38:45,660 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:45,660 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 [2018-01-23 14:38:45,665 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:38:45,701 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:45,778 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:45,792 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:45,805 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34095 backedges. 19777 proven. 198 refuted. 0 times theorem prover too weak. 14120 trivial. 0 not checked. [2018-01-23 14:38:46,381 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:46,381 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2018-01-23 14:38:46,382 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-23 14:38:46,383 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-23 14:38:46,383 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:38:46,383 INFO L87 Difference]: Start difference. First operand 607 states and 684 transitions. Second operand 39 states. [2018-01-23 14:38:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:47,341 INFO L93 Difference]: Finished difference Result 1231 states and 1370 transitions. [2018-01-23 14:38:47,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-23 14:38:47,341 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 761 [2018-01-23 14:38:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:47,344 INFO L225 Difference]: With dead ends: 1231 [2018-01-23 14:38:47,344 INFO L226 Difference]: Without dead ends: 1014 [2018-01-23 14:38:47,346 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 741 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2018-01-23 14:38:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2018-01-23 14:38:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 611. [2018-01-23 14:38:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2018-01-23 14:38:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 688 transitions. [2018-01-23 14:38:47,395 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 688 transitions. Word has length 761 [2018-01-23 14:38:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:47,396 INFO L432 AbstractCegarLoop]: Abstraction has 611 states and 688 transitions. [2018-01-23 14:38:47,396 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-23 14:38:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 688 transitions. [2018-01-23 14:38:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2018-01-23 14:38:47,404 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:47,405 INFO L322 BasicCegarLoop]: trace histogram [137, 121, 121, 121, 121, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:47,405 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1219868744, now seen corresponding path program 15 times [2018-01-23 14:38:47,405 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:47,405 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:47,406 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:47,406 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:47,406 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:47,481 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41764 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 40892 trivial. 0 not checked. [2018-01-23 14:38:48,617 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:48,636 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 [2018-01-23 14:38:48,641 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:38:48,684 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,687 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,691 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,696 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,703 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,708 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,714 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,722 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,731 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,745 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,764 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,782 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,798 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:48,800 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:48,816 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 41764 backedges. 6767 proven. 297 refuted. 0 times theorem prover too weak. 34700 trivial. 0 not checked. [2018-01-23 14:38:49,366 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:49,366 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2018-01-23 14:38:49,367 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-23 14:38:49,367 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-23 14:38:49,367 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=729, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:38:49,368 INFO L87 Difference]: Start difference. First operand 611 states and 688 transitions. Second operand 32 states. [2018-01-23 14:38:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:49,993 INFO L93 Difference]: Finished difference Result 1448 states and 1644 transitions. [2018-01-23 14:38:49,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-23 14:38:49,994 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 834 [2018-01-23 14:38:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:50,002 INFO L225 Difference]: With dead ends: 1448 [2018-01-23 14:38:50,002 INFO L226 Difference]: Without dead ends: 1355 [2018-01-23 14:38:50,004 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:38:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2018-01-23 14:38:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 697. [2018-01-23 14:38:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2018-01-23 14:38:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 793 transitions. [2018-01-23 14:38:50,063 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 793 transitions. Word has length 834 [2018-01-23 14:38:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:50,064 INFO L432 AbstractCegarLoop]: Abstraction has 697 states and 793 transitions. [2018-01-23 14:38:50,064 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-23 14:38:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 793 transitions. [2018-01-23 14:38:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2018-01-23 14:38:50,074 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:50,074 INFO L322 BasicCegarLoop]: trace histogram [155, 138, 138, 138, 138, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:50,074 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1207046686, now seen corresponding path program 16 times [2018-01-23 14:38:50,075 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:50,075 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:50,076 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:50,076 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:50,076 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:50,160 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 53759 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 52773 trivial. 0 not checked. [2018-01-23 14:38:51,436 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:51,436 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 [2018-01-23 14:38:51,441 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:38:51,597 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:51,611 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 53759 backedges. 29984 proven. 354 refuted. 0 times theorem prover too weak. 23421 trivial. 0 not checked. [2018-01-23 14:38:52,654 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:52,654 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 47 [2018-01-23 14:38:52,655 INFO L409 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-01-23 14:38:52,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-01-23 14:38:52,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:38:52,656 INFO L87 Difference]: Start difference. First operand 697 states and 793 transitions. Second operand 47 states. [2018-01-23 14:38:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:53,997 INFO L93 Difference]: Finished difference Result 1717 states and 1949 transitions. [2018-01-23 14:38:53,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-23 14:38:53,997 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 932 [2018-01-23 14:38:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:54,002 INFO L225 Difference]: With dead ends: 1717 [2018-01-23 14:38:54,002 INFO L226 Difference]: Without dead ends: 1475 [2018-01-23 14:38:54,005 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 906 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=966, Invalid=4886, Unknown=0, NotChecked=0, Total=5852 [2018-01-23 14:38:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2018-01-23 14:38:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 780. [2018-01-23 14:38:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-01-23 14:38:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 884 transitions. [2018-01-23 14:38:54,073 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 884 transitions. Word has length 932 [2018-01-23 14:38:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:54,074 INFO L432 AbstractCegarLoop]: Abstraction has 780 states and 884 transitions. [2018-01-23 14:38:54,074 INFO L433 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-01-23 14:38:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 884 transitions. [2018-01-23 14:38:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2018-01-23 14:38:54,085 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:54,085 INFO L322 BasicCegarLoop]: trace histogram [173, 155, 155, 155, 155, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:54,086 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:54,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1929501300, now seen corresponding path program 17 times [2018-01-23 14:38:54,086 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:54,086 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:54,087 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:54,087 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:54,087 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:54,174 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 67280 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 66173 trivial. 0 not checked. [2018-01-23 14:38:55,793 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:55,793 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 [2018-01-23 14:38:55,798 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:38:55,844 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,845 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,846 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,848 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,849 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,852 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,855 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,860 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,868 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,879 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,888 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,904 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,921 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,940 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,964 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:55,993 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:56,027 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:56,065 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:56,101 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:56,142 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:56,147 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:56,159 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 67280 backedges. 38154 proven. 1615 refuted. 0 times theorem prover too weak. 27511 trivial. 0 not checked. [2018-01-23 14:38:57,012 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:57,013 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29] total 48 [2018-01-23 14:38:57,013 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:38:57,014 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:38:57,014 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1878, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:38:57,014 INFO L87 Difference]: Start difference. First operand 780 states and 884 transitions. Second operand 48 states. [2018-01-23 14:38:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:58,689 INFO L93 Difference]: Finished difference Result 1998 states and 2255 transitions. [2018-01-23 14:38:58,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-01-23 14:38:58,690 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 1030 [2018-01-23 14:38:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:58,695 INFO L225 Difference]: With dead ends: 1998 [2018-01-23 14:38:58,695 INFO L226 Difference]: Without dead ends: 1188 [2018-01-23 14:38:58,700 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1264, Invalid=7478, Unknown=0, NotChecked=0, Total=8742 [2018-01-23 14:38:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2018-01-23 14:38:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 784. [2018-01-23 14:38:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-01-23 14:38:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 877 transitions. [2018-01-23 14:38:58,764 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 877 transitions. Word has length 1030 [2018-01-23 14:38:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:58,765 INFO L432 AbstractCegarLoop]: Abstraction has 784 states and 877 transitions. [2018-01-23 14:38:58,765 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:38:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 877 transitions. [2018-01-23 14:38:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2018-01-23 14:38:58,777 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:58,778 INFO L322 BasicCegarLoop]: trace histogram [188, 169, 169, 169, 169, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:58,778 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1560989770, now seen corresponding path program 18 times [2018-01-23 14:38:58,779 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:58,779 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:58,779 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:58,780 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:58,780 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:58,852 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:39:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 79663 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 78428 trivial. 0 not checked. [2018-01-23 14:39:00,814 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:39:00,814 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 [2018-01-23 14:39:00,819 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:39:00,864 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,866 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,869 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,870 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,873 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,875 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,879 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,884 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,891 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,899 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,920 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,925 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,933 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,942 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,952 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,961 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,968 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,980 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:00,990 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,013 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,023 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,043 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,056 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,079 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,099 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,130 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,173 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,296 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,367 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:39:01,371 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:39:01,382 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:39:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 79663 backedges. 11120 proven. 416 refuted. 0 times theorem prover too weak. 68127 trivial. 0 not checked. [2018-01-23 14:39:01,992 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:39:01,992 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2018-01-23 14:39:01,993 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-23 14:39:01,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-23 14:39:01,993 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=980, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:39:01,994 INFO L87 Difference]: Start difference. First operand 784 states and 877 transitions. Second operand 37 states. [2018-01-23 14:39:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:39:02,880 INFO L93 Difference]: Finished difference Result 1793 states and 2032 transitions. [2018-01-23 14:39:02,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-01-23 14:39:02,881 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1113 [2018-01-23 14:39:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:39:02,887 INFO L225 Difference]: With dead ends: 1793 [2018-01-23 14:39:02,887 INFO L226 Difference]: Without dead ends: 1685 [2018-01-23 14:39:02,889 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1099 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=590, Invalid=1960, Unknown=0, NotChecked=0, Total=2550 [2018-01-23 14:39:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2018-01-23 14:39:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 880. [2018-01-23 14:39:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-01-23 14:39:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 994 transitions. [2018-01-23 14:39:02,969 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 994 transitions. Word has length 1113 [2018-01-23 14:39:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:39:02,971 INFO L432 AbstractCegarLoop]: Abstraction has 880 states and 994 transitions. [2018-01-23 14:39:02,971 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-23 14:39:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 994 transitions. [2018-01-23 14:39:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1227 [2018-01-23 14:39:02,985 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:39:02,985 INFO L322 BasicCegarLoop]: trace histogram [209, 189, 189, 189, 189, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:39:02,985 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:39:02,986 INFO L82 PathProgramCache]: Analyzing trace with hash -758668612, now seen corresponding path program 19 times [2018-01-23 14:39:02,986 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:39:02,986 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:39:02,987 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:39:02,987 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:39:02,987 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:39:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:39:03,092 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-01-23 14:39:04,360 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:264) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:262) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:131) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:200) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:915) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:279) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackTraceAbstractionRefinementStrategy.getTraceCheck(MultiTrackTraceAbstractionRefinementStrategy.java:218) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:205) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:381) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:157) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:113) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:117) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-01-23 14:39:04,363 INFO L168 Benchmark]: Toolchain (without parser) took 41830.97 ms. Allocated memory was 300.9 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 260.3 MB in the beginning and 516.1 MB in the end (delta: -255.8 MB). Peak memory consumption was 1.9 GB. Max. memory is 5.3 GB. [2018-01-23 14:39:04,364 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 300.9 MB. Free memory is still 264.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:39:04,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.96 ms. Allocated memory is still 300.9 MB. Free memory was 260.3 MB in the beginning and 250.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:39:04,364 INFO L168 Benchmark]: Boogie Preprocessor took 30.90 ms. Allocated memory is still 300.9 MB. Free memory is still 250.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:39:04,365 INFO L168 Benchmark]: RCFGBuilder took 236.97 ms. Allocated memory is still 300.9 MB. Free memory was 250.3 MB in the beginning and 233.7 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:39:04,365 INFO L168 Benchmark]: TraceAbstraction took 41370.15 ms. Allocated memory was 300.9 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 233.7 MB in the beginning and 516.1 MB in the end (delta: -282.4 MB). Peak memory consumption was 1.9 GB. Max. memory is 5.3 GB. [2018-01-23 14:39:04,367 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 300.9 MB. Free memory is still 264.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 185.96 ms. Allocated memory is still 300.9 MB. Free memory was 260.3 MB in the beginning and 250.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.90 ms. Allocated memory is still 300.9 MB. Free memory is still 250.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * RCFGBuilder took 236.97 ms. Allocated memory is still 300.9 MB. Free memory was 250.3 MB in the beginning and 233.7 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 41370.15 ms. Allocated memory was 300.9 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 233.7 MB in the beginning and 516.1 MB in the end (delta: -282.4 MB). Peak memory consumption was 1.9 GB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 44 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 4 procedures, 44 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 46 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:264) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-39-04-374.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-39-04-374.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-39-04-374.csv Completed graceful shutdown