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/memsafety/960521-1_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:22:42,404 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:22:42,406 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:22:42,418 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:22:42,418 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:22:42,419 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:22:42,420 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:22:42,422 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:22:42,424 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:22:42,424 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:22:42,425 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:22:42,425 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:22:42,425 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:22:42,427 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:22:42,428 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:22:42,430 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:22:42,432 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:22:42,434 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:22:42,435 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:22:42,437 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:22:42,439 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:22:42,439 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:22:42,439 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:22:42,440 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:22:42,441 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:22:42,442 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:22:42,443 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:22:42,443 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:22:42,443 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:22:42,444 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:22:42,444 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:22:42,445 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 14:22:42,454 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:22:42,455 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:22:42,455 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:22:42,456 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:22:42,456 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:22:42,456 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:22:42,456 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:22:42,457 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:22:42,457 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:22:42,457 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:22:42,457 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:22:42,458 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:22:42,458 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:22:42,458 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:22:42,458 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:22:42,459 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:22:42,459 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:22:42,459 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:22:42,459 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:22:42,459 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:22:42,460 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:22:42,460 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:22:42,460 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:22:42,460 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:22:42,460 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:22:42,461 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:22:42,461 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:22:42,461 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:22:42,461 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:22:42,461 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:22:42,462 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:22:42,462 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:22:42,462 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:22:42,462 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:22:42,462 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:22:42,463 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:22:42,463 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:22:42,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:22:42,511 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:22:42,515 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:22:42,516 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:22:42,517 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:22:42,518 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/960521-1_false-valid-deref.i [2018-01-23 14:22:42,690 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:22:42,696 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:22:42,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:22:42,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:22:42,701 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:22:42,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:22:42" (1/1) ... [2018-01-23 14:22:42,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27e13832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42, skipping insertion in model container [2018-01-23 14:22:42,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:22:42" (1/1) ... [2018-01-23 14:22:42,718 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:22:42,756 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:22:42,872 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:22:42,889 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:22:42,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42 WrapperNode [2018-01-23 14:22:42,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:22:42,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:22:42,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:22:42,898 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:22:42,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42" (1/1) ... [2018-01-23 14:22:42,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42" (1/1) ... [2018-01-23 14:22:42,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42" (1/1) ... [2018-01-23 14:22:42,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42" (1/1) ... [2018-01-23 14:22:42,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42" (1/1) ... [2018-01-23 14:22:42,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42" (1/1) ... [2018-01-23 14:22:42,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42" (1/1) ... [2018-01-23 14:22:42,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:22:42,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:22:42,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:22:42,930 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:22:42,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42" (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 14:22:42,984 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:22:42,984 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:22:42,984 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-23 14:22:42,985 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:22:42,985 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:22:42,985 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:22:42,985 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:22:42,985 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:22:42,986 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:22:42,986 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-23 14:22:42,986 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-23 14:22:42,986 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-23 14:22:42,986 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:22:42,986 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:22:42,987 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:22:43,196 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:22:43,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:22:43 BoogieIcfgContainer [2018-01-23 14:22:43,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:22:43,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:22:43,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:22:43,199 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:22:43,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:22:42" (1/3) ... [2018-01-23 14:22:43,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5148f91e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:22:43, skipping insertion in model container [2018-01-23 14:22:43,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:42" (2/3) ... [2018-01-23 14:22:43,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5148f91e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:22:43, skipping insertion in model container [2018-01-23 14:22:43,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:22:43" (3/3) ... [2018-01-23 14:22:43,202 INFO L105 eAbstractionObserver]: Analyzing ICFG 960521-1_false-valid-deref.i [2018-01-23 14:22:43,209 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:22:43,214 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:22:43,249 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:22:43,249 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:22:43,249 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:22:43,249 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:22:43,249 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:22:43,249 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:22:43,250 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:22:43,250 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:22:43,251 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:22:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-23 14:22:43,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:22:43,278 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:43,279 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:22:43,279 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:22:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash 90336, now seen corresponding path program 1 times [2018-01-23 14:22:43,285 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:43,285 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:43,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,327 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:43,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:22:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:22:43,395 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:22:43,403 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:22:43,412 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:22:43,412 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:22:43,412 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:22:43,412 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:22:43,412 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:22:43,413 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:22:43,413 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:22:43,413 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-23 14:22:43,413 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:22:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-23 14:22:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-23 14:22:43,415 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:43,415 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:43,415 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-23 14:22:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash 935443697, now seen corresponding path program 1 times [2018-01-23 14:22:43,416 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:43,416 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:43,417 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,417 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:43,418 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:43,457 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:43,501 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 14:22:43,523 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:22:43,523 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:22:43,524 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:22:43,539 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:22:43,539 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:22:43,542 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-23 14:22:43,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:43,567 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-23 14:22:43,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:22:43,635 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-23 14:22:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:43,643 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:22:43,644 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:22:43,648 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:22:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:22:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:22:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:22:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:22:43,675 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-23 14:22:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:43,675 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:22:43,675 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:22:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:22:43,675 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:22:43,678 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:22:43,679 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:22:43,679 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:22:43,679 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:22:43,679 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:22:43,679 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:22:43,679 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:22:43,679 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:22:43,679 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:22:43,681 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-23 14:22:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-23 14:22:43,683 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:43,683 INFO L322 BasicCegarLoop]: trace histogram [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 14:22:43,683 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:43,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1172106943, now seen corresponding path program 1 times [2018-01-23 14:22:43,683 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:43,684 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:43,685 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,685 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:43,685 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:43,706 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:43,733 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 14:22:43,733 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:22:43,734 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:22:43,734 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:22:43,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:22:43,734 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:22:43,735 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-23 14:22:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:43,740 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-23 14:22:43,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:22:43,740 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2018-01-23 14:22:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:43,744 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:22:43,744 INFO L226 Difference]: Without dead ends: 36 [2018-01-23 14:22:43,745 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 14:22:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-23 14:22:43,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-23 14:22:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-23 14:22:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-23 14:22:43,758 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2018-01-23 14:22:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:43,758 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-23 14:22:43,759 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:22:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-23 14:22:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-23 14:22:43,760 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:43,760 INFO L322 BasicCegarLoop]: trace histogram [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 14:22:43,760 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:43,760 INFO L82 PathProgramCache]: Analyzing trace with hash -862637837, now seen corresponding path program 1 times [2018-01-23 14:22:43,761 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:43,761 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:43,762 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,762 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:43,762 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:43,782 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:43,846 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 14:22:43,846 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:22:43,846 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:22:43,848 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:22:43,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:22:43,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:22:43,849 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 3 states. [2018-01-23 14:22:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:43,885 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-01-23 14:22:43,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:22:43,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-01-23 14:22:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:43,887 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:22:43,887 INFO L226 Difference]: Without dead ends: 45 [2018-01-23 14:22:43,888 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 14:22:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-23 14:22:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2018-01-23 14:22:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-23 14:22:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-01-23 14:22:43,895 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2018-01-23 14:22:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:43,895 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-01-23 14:22:43,895 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:22:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-01-23 14:22:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:22:43,897 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:43,897 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] [2018-01-23 14:22:43,897 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:43,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1162981958, now seen corresponding path program 1 times [2018-01-23 14:22:43,897 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:43,898 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:43,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,899 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:43,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:43,918 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:22:43,984 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:22:43,984 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:22:43,985 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:22:43,985 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:22:43,985 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:22:43,986 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 5 states. [2018-01-23 14:22:44,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:44,092 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2018-01-23 14:22:44,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:22:44,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-23 14:22:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:44,094 INFO L225 Difference]: With dead ends: 64 [2018-01-23 14:22:44,094 INFO L226 Difference]: Without dead ends: 44 [2018-01-23 14:22:44,094 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:22:44,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-23 14:22:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-01-23 14:22:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-23 14:22:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-01-23 14:22:44,100 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-01-23 14:22:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:44,100 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-01-23 14:22:44,101 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:22:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-01-23 14:22:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-23 14:22:44,101 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:44,102 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:44,102 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:44,102 INFO L82 PathProgramCache]: Analyzing trace with hash -797934829, now seen corresponding path program 1 times [2018-01-23 14:22:44,102 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:44,102 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:44,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:44,103 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:44,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:44,123 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:22:44,193 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:44,193 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 14:22:44,205 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:44,247 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:22:44,321 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:44,321 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2018-01-23 14:22:44,321 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:22:44,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:22:44,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:22:44,322 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2018-01-23 14:22:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:44,463 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-01-23 14:22:44,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:22:44,464 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2018-01-23 14:22:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:44,465 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:22:44,465 INFO L226 Difference]: Without dead ends: 52 [2018-01-23 14:22:44,466 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:22:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-23 14:22:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2018-01-23 14:22:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-23 14:22:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-01-23 14:22:44,470 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 37 [2018-01-23 14:22:44,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:44,470 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-01-23 14:22:44,471 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:22:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-01-23 14:22:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-23 14:22:44,471 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:44,472 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:44,472 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:44,472 INFO L82 PathProgramCache]: Analyzing trace with hash 883379251, now seen corresponding path program 2 times [2018-01-23 14:22:44,472 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:44,472 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:44,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:44,474 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:44,474 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:44,492 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-23 14:22:44,583 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:44,583 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 14:22:44,593 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:22:44,619 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:44,625 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:44,626 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:44,630 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-23 14:22:44,745 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:44,745 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-01-23 14:22:44,746 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:22:44,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:22:44,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:22:44,746 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 10 states. [2018-01-23 14:22:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:44,899 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2018-01-23 14:22:44,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-23 14:22:44,899 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2018-01-23 14:22:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:44,900 INFO L225 Difference]: With dead ends: 84 [2018-01-23 14:22:44,900 INFO L226 Difference]: Without dead ends: 60 [2018-01-23 14:22:44,901 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:22:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-23 14:22:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-01-23 14:22:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-23 14:22:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-01-23 14:22:44,906 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 45 [2018-01-23 14:22:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:44,907 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-01-23 14:22:44,907 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:22:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-01-23 14:22:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-23 14:22:44,908 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:44,908 INFO L322 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:44,908 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:44,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2104023981, now seen corresponding path program 3 times [2018-01-23 14:22:44,908 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:44,909 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:44,909 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:44,909 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:44,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:44,931 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-01-23 14:22:45,070 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:45,070 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 14:22:45,078 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:22:45,103 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:45,107 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:45,110 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:45,114 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:45,115 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:45,117 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-01-23 14:22:45,162 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:45,162 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2018-01-23 14:22:45,163 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-23 14:22:45,163 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-23 14:22:45,163 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:22:45,163 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 9 states. [2018-01-23 14:22:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:45,299 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-01-23 14:22:45,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:22:45,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2018-01-23 14:22:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:45,301 INFO L225 Difference]: With dead ends: 96 [2018-01-23 14:22:45,301 INFO L226 Difference]: Without dead ends: 68 [2018-01-23 14:22:45,302 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:22:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-23 14:22:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-01-23 14:22:45,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-01-23 14:22:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-01-23 14:22:45,310 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 53 [2018-01-23 14:22:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:45,311 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-01-23 14:22:45,311 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-23 14:22:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-01-23 14:22:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-01-23 14:22:45,312 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:45,312 INFO L322 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:45,313 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash -807566477, now seen corresponding path program 4 times [2018-01-23 14:22:45,313 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:45,314 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:45,315 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:45,315 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:45,316 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:45,336 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-01-23 14:22:45,445 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:45,445 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 14:22:45,451 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:22:45,495 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:45,499 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-01-23 14:22:45,634 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:45,635 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2018-01-23 14:22:45,635 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:22:45,635 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:22:45,636 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:22:45,636 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 14 states. [2018-01-23 14:22:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:45,760 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-01-23 14:22:45,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:22:45,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2018-01-23 14:22:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:45,762 INFO L225 Difference]: With dead ends: 108 [2018-01-23 14:22:45,762 INFO L226 Difference]: Without dead ends: 76 [2018-01-23 14:22:45,763 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:22:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-23 14:22:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2018-01-23 14:22:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-23 14:22:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-01-23 14:22:45,769 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 61 [2018-01-23 14:22:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:45,769 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-01-23 14:22:45,769 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:22:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-01-23 14:22:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-01-23 14:22:45,771 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:45,771 INFO L322 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:45,771 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:45,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1638405741, now seen corresponding path program 5 times [2018-01-23 14:22:45,771 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:45,772 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:45,772 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:45,773 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:45,773 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:45,793 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-01-23 14:22:45,907 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:45,907 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 14:22:45,916 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:22:45,926 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:45,935 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:45,938 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:45,942 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:45,952 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:45,993 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:45,997 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:46,001 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-01-23 14:22:46,042 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:46,042 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2018-01-23 14:22:46,042 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-23 14:22:46,042 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-23 14:22:46,043 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:22:46,043 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 11 states. [2018-01-23 14:22:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:46,155 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2018-01-23 14:22:46,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:22:46,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2018-01-23 14:22:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:46,156 INFO L225 Difference]: With dead ends: 120 [2018-01-23 14:22:46,156 INFO L226 Difference]: Without dead ends: 84 [2018-01-23 14:22:46,156 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:22:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-23 14:22:46,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-01-23 14:22:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-23 14:22:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-01-23 14:22:46,164 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 69 [2018-01-23 14:22:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:46,164 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-01-23 14:22:46,165 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-23 14:22:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-01-23 14:22:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-23 14:22:46,166 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:46,166 INFO L322 BasicCegarLoop]: trace histogram [7, 7, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:46,166 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:46,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1138501965, now seen corresponding path program 6 times [2018-01-23 14:22:46,166 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:46,166 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:46,167 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:46,167 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:46,167 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:46,187 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-01-23 14:22:46,370 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:46,370 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 14:22:46,384 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:22:46,405 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:46,411 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:46,415 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:46,422 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:46,434 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:46,481 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:46,501 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:46,502 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:46,508 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 22 proven. 72 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-01-23 14:22:46,716 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:46,716 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2018-01-23 14:22:46,717 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-23 14:22:46,717 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-23 14:22:46,717 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:22:46,718 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 21 states. [2018-01-23 14:22:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:46,883 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2018-01-23 14:22:46,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:22:46,883 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2018-01-23 14:22:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:46,886 INFO L225 Difference]: With dead ends: 138 [2018-01-23 14:22:46,886 INFO L226 Difference]: Without dead ends: 98 [2018-01-23 14:22:46,887 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:22:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-01-23 14:22:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2018-01-23 14:22:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-23 14:22:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-01-23 14:22:46,895 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 77 [2018-01-23 14:22:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:46,896 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-01-23 14:22:46,896 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-23 14:22:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-01-23 14:22:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-01-23 14:22:46,897 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:46,898 INFO L322 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 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 14:22:46,898 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1493422676, now seen corresponding path program 7 times [2018-01-23 14:22:46,898 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:46,898 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:46,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:46,899 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:46,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:46,920 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-23 14:22:47,049 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:47,049 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 14:22:47,054 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:47,100 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-23 14:22:47,231 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:47,231 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2018-01-23 14:22:47,231 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:22:47,232 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:22:47,232 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:22:47,232 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 22 states. [2018-01-23 14:22:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:47,376 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2018-01-23 14:22:47,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:22:47,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2018-01-23 14:22:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:47,377 INFO L225 Difference]: With dead ends: 152 [2018-01-23 14:22:47,377 INFO L226 Difference]: Without dead ends: 108 [2018-01-23 14:22:47,378 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:22:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-01-23 14:22:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-01-23 14:22:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-23 14:22:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-01-23 14:22:47,384 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 89 [2018-01-23 14:22:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:47,384 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-01-23 14:22:47,384 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:22:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-01-23 14:22:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-01-23 14:22:47,385 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:47,386 INFO L322 BasicCegarLoop]: trace histogram [10, 10, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:47,386 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash -698890221, now seen corresponding path program 8 times [2018-01-23 14:22:47,386 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:47,386 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:47,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:47,387 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:47,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:47,404 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-01-23 14:22:47,562 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:47,562 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 14:22:47,567 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:22:47,585 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:47,594 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:47,596 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:47,600 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-01-23 14:22:47,812 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:47,812 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-01-23 14:22:47,813 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:22:47,813 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:22:47,813 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:22:47,814 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 24 states. [2018-01-23 14:22:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:48,040 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-01-23 14:22:48,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:22:48,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 101 [2018-01-23 14:22:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:48,041 INFO L225 Difference]: With dead ends: 168 [2018-01-23 14:22:48,041 INFO L226 Difference]: Without dead ends: 116 [2018-01-23 14:22:48,042 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:22:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-01-23 14:22:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2018-01-23 14:22:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-23 14:22:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-01-23 14:22:48,052 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 101 [2018-01-23 14:22:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:48,052 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-01-23 14:22:48,052 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:22:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-01-23 14:22:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-01-23 14:22:48,054 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:48,054 INFO L322 BasicCegarLoop]: trace histogram [11, 11, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:48,055 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:48,055 INFO L82 PathProgramCache]: Analyzing trace with hash -745483981, now seen corresponding path program 9 times [2018-01-23 14:22:48,055 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:48,055 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:48,056 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:48,056 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:48,056 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:48,070 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-01-23 14:22:48,203 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:48,203 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 14:22:48,208 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:22:48,224 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,228 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,230 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,236 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,241 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,251 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,262 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,279 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,311 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,380 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,401 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:48,402 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:48,405 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-01-23 14:22:48,450 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:48,450 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2018-01-23 14:22:48,451 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:22:48,451 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:22:48,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:22:48,451 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 16 states. [2018-01-23 14:22:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:48,614 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-01-23 14:22:48,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:22:48,614 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2018-01-23 14:22:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:48,615 INFO L225 Difference]: With dead ends: 180 [2018-01-23 14:22:48,615 INFO L226 Difference]: Without dead ends: 124 [2018-01-23 14:22:48,616 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:22:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-01-23 14:22:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-01-23 14:22:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-23 14:22:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-01-23 14:22:48,622 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 109 [2018-01-23 14:22:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:48,622 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-01-23 14:22:48,622 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:22:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-01-23 14:22:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-01-23 14:22:48,623 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:48,623 INFO L322 BasicCegarLoop]: trace histogram [12, 12, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:48,623 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:48,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1047454035, now seen corresponding path program 10 times [2018-01-23 14:22:48,623 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:48,624 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:48,624 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:48,625 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:48,625 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:48,643 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-01-23 14:22:48,824 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:48,824 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 14:22:48,834 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:22:49,121 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:49,125 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-01-23 14:22:49,314 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:49,314 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2018-01-23 14:22:49,314 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:22:49,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:22:49,315 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:22:49,315 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 28 states. [2018-01-23 14:22:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:49,478 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2018-01-23 14:22:49,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:22:49,479 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 117 [2018-01-23 14:22:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:49,480 INFO L225 Difference]: With dead ends: 192 [2018-01-23 14:22:49,480 INFO L226 Difference]: Without dead ends: 132 [2018-01-23 14:22:49,481 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=511, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:22:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-01-23 14:22:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2018-01-23 14:22:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-01-23 14:22:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-01-23 14:22:49,490 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 117 [2018-01-23 14:22:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:49,490 INFO L432 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-01-23 14:22:49,490 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:22:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-01-23 14:22:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-01-23 14:22:49,492 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:49,492 INFO L322 BasicCegarLoop]: trace histogram [13, 13, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:49,492 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash 244283507, now seen corresponding path program 11 times [2018-01-23 14:22:49,493 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:49,493 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:49,494 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:49,494 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:49,494 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:49,514 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-23 14:22:49,697 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:49,697 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 14:22:49,710 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:22:49,720 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:49,726 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:49,733 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:49,736 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:49,745 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:49,755 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:49,811 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:49,839 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:49,875 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:49,936 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:50,122 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:50,223 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:52,716 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:52,724 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:52,731 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-23 14:22:52,789 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:52,789 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2018-01-23 14:22:52,790 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-23 14:22:52,790 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-23 14:22:52,790 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:22:52,791 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 18 states. [2018-01-23 14:22:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:53,048 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-01-23 14:22:53,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:22:53,049 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2018-01-23 14:22:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:53,050 INFO L225 Difference]: With dead ends: 204 [2018-01-23 14:22:53,050 INFO L226 Difference]: Without dead ends: 140 [2018-01-23 14:22:53,050 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:22:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-01-23 14:22:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2018-01-23 14:22:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-01-23 14:22:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-01-23 14:22:53,058 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 125 [2018-01-23 14:22:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:53,058 INFO L432 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-01-23 14:22:53,058 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-23 14:22:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-01-23 14:22:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-01-23 14:22:53,059 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:53,059 INFO L322 BasicCegarLoop]: trace histogram [14, 14, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:53,059 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:53,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1479534957, now seen corresponding path program 12 times [2018-01-23 14:22:53,060 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:53,060 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:53,060 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:53,061 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:53,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:53,073 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-01-23 14:22:53,241 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:53,242 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 14:22:53,248 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:22:53,265 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,269 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,272 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,276 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,292 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,320 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,355 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,417 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,461 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,602 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,769 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:53,830 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:54,161 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:54,538 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:22:54,540 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:54,546 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 50 proven. 338 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-23 14:22:54,801 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:54,802 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2018-01-23 14:22:54,802 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-23 14:22:54,802 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-23 14:22:54,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:22:54,803 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 35 states. [2018-01-23 14:22:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:54,976 INFO L93 Difference]: Finished difference Result 222 states and 229 transitions. [2018-01-23 14:22:54,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:22:54,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2018-01-23 14:22:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:54,978 INFO L225 Difference]: With dead ends: 222 [2018-01-23 14:22:54,978 INFO L226 Difference]: Without dead ends: 154 [2018-01-23 14:22:54,979 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=811, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:22:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-01-23 14:22:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2018-01-23 14:22:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-01-23 14:22:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-01-23 14:22:54,989 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 133 [2018-01-23 14:22:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:54,990 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-01-23 14:22:54,990 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-23 14:22:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-01-23 14:22:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-01-23 14:22:54,991 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:54,991 INFO L322 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 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 14:22:54,991 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:54,992 INFO L82 PathProgramCache]: Analyzing trace with hash 144261004, now seen corresponding path program 13 times [2018-01-23 14:22:54,992 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:54,992 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:54,993 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:54,993 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:54,993 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:55,017 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-01-23 14:22:55,350 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:55,350 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 14:22:55,355 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:55,387 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-01-23 14:22:55,578 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:55,579 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2018-01-23 14:22:55,579 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:22:55,579 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:22:55,579 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=800, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:22:55,579 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 36 states. [2018-01-23 14:22:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:55,736 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2018-01-23 14:22:55,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:22:55,736 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 145 [2018-01-23 14:22:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:55,737 INFO L225 Difference]: With dead ends: 236 [2018-01-23 14:22:55,737 INFO L226 Difference]: Without dead ends: 164 [2018-01-23 14:22:55,738 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:22:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-01-23 14:22:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-01-23 14:22:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-01-23 14:22:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-01-23 14:22:55,744 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 145 [2018-01-23 14:22:55,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:55,745 INFO L432 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-01-23 14:22:55,745 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:22:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-01-23 14:22:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-01-23 14:22:55,745 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:55,746 INFO L322 BasicCegarLoop]: trace histogram [17, 17, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:55,746 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:55,746 INFO L82 PathProgramCache]: Analyzing trace with hash -927393037, now seen corresponding path program 14 times [2018-01-23 14:22:55,746 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:55,746 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:55,746 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:55,747 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:55,747 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:55,770 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-01-23 14:22:56,033 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:56,033 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 14:22:56,038 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:22:56,053 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:56,064 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:22:56,067 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:56,071 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-01-23 14:22:56,290 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:56,291 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2018-01-23 14:22:56,291 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:22:56,291 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:22:56,291 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=892, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:22:56,292 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 38 states. [2018-01-23 14:22:56,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:56,471 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2018-01-23 14:22:56,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:22:56,472 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 157 [2018-01-23 14:22:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:56,472 INFO L225 Difference]: With dead ends: 252 [2018-01-23 14:22:56,473 INFO L226 Difference]: Without dead ends: 172 [2018-01-23 14:22:56,473 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=931, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:22:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-01-23 14:22:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2018-01-23 14:22:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-01-23 14:22:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-01-23 14:22:56,481 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 157 [2018-01-23 14:22:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:56,481 INFO L432 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-01-23 14:22:56,481 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:22:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-01-23 14:22:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-01-23 14:22:56,482 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:56,482 INFO L322 BasicCegarLoop]: trace histogram [18, 18, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:56,483 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2111777517, now seen corresponding path program 15 times [2018-01-23 14:22:56,483 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:56,483 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:56,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:56,484 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:56,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:56,507 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-01-23 14:22:56,766 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:56,766 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 14:22:56,771 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:22:56,790 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:56,793 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:56,795 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:56,799 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:56,803 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:56,811 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:56,823 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:56,841 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:56,859 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:56,951 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:57,031 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:57,106 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:57,148 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:57,231 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:57,626 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:57,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:58,210 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:58,685 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:22:58,687 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:22:58,705 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:22:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-01-23 14:22:58,957 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:22:58,957 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2018-01-23 14:22:58,958 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:22:58,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:22:58,958 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=989, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:22:58,958 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 40 states. [2018-01-23 14:22:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:59,142 INFO L93 Difference]: Finished difference Result 264 states and 269 transitions. [2018-01-23 14:22:59,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-23 14:22:59,142 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2018-01-23 14:22:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:59,143 INFO L225 Difference]: With dead ends: 264 [2018-01-23 14:22:59,143 INFO L226 Difference]: Without dead ends: 180 [2018-01-23 14:22:59,144 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=610, Invalid=1030, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:22:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-01-23 14:22:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2018-01-23 14:22:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-01-23 14:22:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-01-23 14:22:59,151 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 165 [2018-01-23 14:22:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:59,151 INFO L432 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-01-23 14:22:59,151 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:22:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-01-23 14:22:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-01-23 14:22:59,152 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:59,152 INFO L322 BasicCegarLoop]: trace histogram [19, 19, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:59,152 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash -272886221, now seen corresponding path program 16 times [2018-01-23 14:22:59,152 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:59,152 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:59,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:59,153 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:22:59,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:59,168 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-01-23 14:22:59,626 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:22:59,626 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 14:22:59,631 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:23:01,089 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:01,095 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-01-23 14:23:01,352 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:01,353 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2018-01-23 14:23:01,353 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-23 14:23:01,353 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-23 14:23:01,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1091, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:23:01,354 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 42 states. [2018-01-23 14:23:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:01,582 INFO L93 Difference]: Finished difference Result 276 states and 281 transitions. [2018-01-23 14:23:01,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:23:01,583 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 173 [2018-01-23 14:23:01,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:01,584 INFO L225 Difference]: With dead ends: 276 [2018-01-23 14:23:01,584 INFO L226 Difference]: Without dead ends: 188 [2018-01-23 14:23:01,585 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=672, Invalid=1134, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:23:01,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-01-23 14:23:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-01-23 14:23:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-01-23 14:23:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-01-23 14:23:01,595 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 173 [2018-01-23 14:23:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:01,595 INFO L432 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-01-23 14:23:01,596 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-23 14:23:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-01-23 14:23:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-01-23 14:23:01,597 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:01,597 INFO L322 BasicCegarLoop]: trace histogram [20, 20, 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:01,597 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:23:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1592286803, now seen corresponding path program 17 times [2018-01-23 14:23:01,597 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:01,598 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:01,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:01,598 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:01,599 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:01,617 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-01-23 14:23:01,931 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:01,931 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 14:23:01,936 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:23:01,948 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:01,955 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:01,969 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:01,983 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:01,997 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:02,011 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:02,032 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:02,050 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:02,145 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:02,274 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:02,485 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:03,226 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:04,855 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:06,794 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:09,227 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:18,330 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:26,162 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:29,934 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:41,954 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command Received shutdown request... [2018-01-23 14:23:53,976 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:53,995 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:54,024 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:54,031 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-23 14:23:54,031 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:23:54,032 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:23:54,033 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:23:54,033 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:23:54,033 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:23:54,033 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:23:54,033 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:23:54,033 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:23:54,033 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:23:54,033 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:23:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-23 14:23:54,034 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:23:54,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:23:54 BoogieIcfgContainer [2018-01-23 14:23:54,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:23:54,035 INFO L168 Benchmark]: Toolchain (without parser) took 71344.18 ms. Allocated memory was 303.6 MB in the beginning and 656.4 MB in the end (delta: 352.8 MB). Free memory was 263.5 MB in the beginning and 469.8 MB in the end (delta: -206.3 MB). Peak memory consumption was 146.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:23:54,036 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 303.6 MB. Free memory is still 269.5 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:23:54,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.07 ms. Allocated memory is still 303.6 MB. Free memory was 262.5 MB in the beginning and 252.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:23:54,037 INFO L168 Benchmark]: Boogie Preprocessor took 32.02 ms. Allocated memory is still 303.6 MB. Free memory was 252.5 MB in the beginning and 250.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:23:54,037 INFO L168 Benchmark]: RCFGBuilder took 266.84 ms. Allocated memory is still 303.6 MB. Free memory was 250.5 MB in the beginning and 234.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:23:54,037 INFO L168 Benchmark]: TraceAbstraction took 70836.87 ms. Allocated memory was 303.6 MB in the beginning and 656.4 MB in the end (delta: 352.8 MB). Free memory was 234.5 MB in the beginning and 469.8 MB in the end (delta: -235.2 MB). Peak memory consumption was 117.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:23:54,038 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 303.6 MB. Free memory is still 269.5 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 201.07 ms. Allocated memory is still 303.6 MB. Free memory was 262.5 MB in the beginning and 252.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 32.02 ms. Allocated memory is still 303.6 MB. Free memory was 252.5 MB in the beginning and 250.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 266.84 ms. Allocated memory is still 303.6 MB. Free memory was 250.5 MB in the beginning and 234.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 70836.87 ms. Allocated memory was 303.6 MB in the beginning and 656.4 MB in the end (delta: 352.8 MB). Free memory was 234.5 MB in the beginning and 469.8 MB in the end (delta: -235.2 MB). Peak memory consumption was 117.6 MB. 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: [L619] int *a, *b; [L620] int n; VAL [\old(a)=7, \old(a)=4, \old(b)=3, \old(b)=2, \old(n)=5, a={0:0}, b={0:0}, n=0] - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 40 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=40occurred 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: 621]: 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, 40 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 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=40occurred 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, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 182 with TraceHistMax 20, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. TIMEOUT Result, 70.3s OverallTime, 20 OverallIterations, 20 TraceHistogramMax, 2.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 563 SDtfs, 2763 SDslu, 5276 SDs, 0 SdLazy, 2665 SolverSat, 720 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1961 GetRequests, 1560 SyntacticMatches, 10 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3869 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred in iteration=19, 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: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 79 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 3401 NumberOfCodeBlocks, 3401 NumberOfCodeBlocksAsserted, 107 NumberOfCheckSat, 3366 ConstructedInterpolants, 0 QuantifiedInterpolants, 1213316 SizeOfPredicates, 18 NumberOfNonLiveVariables, 3714 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 35 InterpolantComputations, 3 PerfectInterpolantSequences, 7282/14738 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 629]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 629). Cancelled while IsEmpty was searching accepting run (input had 40 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_false-valid-deref.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-23-54-044.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_false-valid-deref.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-23-54-044.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_false-valid-deref.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-23-54-044.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_false-valid-deref.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-23-54-044.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_false-valid-deref.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-23_14-23-54-044.csv Completed graceful shutdown