java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_false-valid-deref-write.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 22:13:01,509 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 22:13:01,511 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 22:13:01,525 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 22:13:01,526 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 22:13:01,527 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 22:13:01,528 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 22:13:01,530 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 22:13:01,532 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 22:13:01,532 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 22:13:01,533 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 22:13:01,533 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 22:13:01,534 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 22:13:01,535 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 22:13:01,535 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 22:13:01,538 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 22:13:01,540 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 22:13:01,542 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 22:13:01,544 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 22:13:01,545 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 22:13:01,548 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-20 22:13:01,548 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-20 22:13:01,548 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-20 22:13:01,549 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-20 22:13:01,550 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-20 22:13:01,551 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-20 22:13:01,552 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-20 22:13:01,552 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-20 22:13:01,553 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-20 22:13:01,553 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 22:13:01,553 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 22:13:01,554 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-20 22:13:01,564 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 22:13:01,564 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 22:13:01,565 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 22:13:01,565 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 22:13:01,565 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 22:13:01,566 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 22:13:01,566 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 22:13:01,567 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 22:13:01,567 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 22:13:01,567 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 22:13:01,567 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 22:13:01,567 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 22:13:01,568 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 22:13:01,568 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 22:13:01,568 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 22:13:01,568 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 22:13:01,568 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 22:13:01,569 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 22:13:01,569 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 22:13:01,569 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 22:13:01,569 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 22:13:01,569 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 22:13:01,570 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 22:13:01,570 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 22:13:01,570 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 22:13:01,570 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:13:01,570 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 22:13:01,570 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 22:13:01,571 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 22:13:01,571 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 22:13:01,571 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 22:13:01,571 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 22:13:01,571 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 22:13:01,571 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 22:13:01,571 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 22:13:01,572 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 22:13:01,572 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 22:13:01,605 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 22:13:01,616 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 22:13:01,619 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 22:13:01,620 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 22:13:01,621 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 22:13:01,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_false-valid-deref-write.c [2018-01-20 22:13:01,743 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 22:13:01,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 22:13:01,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 22:13:01,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 22:13:01,756 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 22:13:01,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:13:01" (1/1) ... [2018-01-20 22:13:01,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60aa16d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01, skipping insertion in model container [2018-01-20 22:13:01,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:13:01" (1/1) ... [2018-01-20 22:13:01,781 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:13:01,800 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:13:01,905 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:13:01,920 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:13:01,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01 WrapperNode [2018-01-20 22:13:01,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 22:13:01,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 22:13:01,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 22:13:01,927 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 22:13:01,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01" (1/1) ... [2018-01-20 22:13:01,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01" (1/1) ... [2018-01-20 22:13:01,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01" (1/1) ... [2018-01-20 22:13:01,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01" (1/1) ... [2018-01-20 22:13:01,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01" (1/1) ... [2018-01-20 22:13:01,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01" (1/1) ... [2018-01-20 22:13:01,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01" (1/1) ... [2018-01-20 22:13:01,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 22:13:01,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 22:13:01,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 22:13:01,961 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 22:13:01,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:13:02,007 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 22:13:02,007 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 22:13:02,007 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-20 22:13:02,007 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 22:13:02,007 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 22:13:02,007 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 22:13:02,007 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 22:13:02,007 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 22:13:02,008 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 22:13:02,008 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-20 22:13:02,008 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 22:13:02,008 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 22:13:02,008 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 22:13:02,154 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 22:13:02,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:13:02 BoogieIcfgContainer [2018-01-20 22:13:02,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 22:13:02,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 22:13:02,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 22:13:02,157 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 22:13:02,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 10:13:01" (1/3) ... [2018-01-20 22:13:02,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b65508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:13:02, skipping insertion in model container [2018-01-20 22:13:02,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:01" (2/3) ... [2018-01-20 22:13:02,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b65508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:13:02, skipping insertion in model container [2018-01-20 22:13:02,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:13:02" (3/3) ... [2018-01-20 22:13:02,160 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_false-valid-deref-write.c [2018-01-20 22:13:02,166 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 22:13:02,172 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 22:13:02,219 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:13:02,219 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:13:02,219 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:13:02,220 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:13:02,220 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:13:02,220 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:13:02,220 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:13:02,220 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 22:13:02,221 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:13:02,242 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 22:13:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 22:13:02,248 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:02,249 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 22:13:02,249 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 22:13:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-20 22:13:02,257 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:02,258 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:02,315 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,315 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:02,315 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:13:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:13:02,379 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 22:13:02,387 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:13:02,394 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:13:02,395 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:13:02,395 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:13:02,395 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:13:02,395 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:13:02,395 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:13:02,395 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:13:02,395 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-20 22:13:02,396 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:13:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 22:13:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-20 22:13:02,399 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:02,399 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:02,399 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-20 22:13:02,400 INFO L82 PathProgramCache]: Analyzing trace with hash 352444009, now seen corresponding path program 1 times [2018-01-20 22:13:02,400 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:02,400 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:02,401 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,402 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:02,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:02,433 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:02,472 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:13:02,473 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:13:02,474 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:13:02,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:13:02,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:13:02,493 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-20 22:13:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:02,520 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-20 22:13:02,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:13:02,522 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-20 22:13:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:02,530 INFO L225 Difference]: With dead ends: 72 [2018-01-20 22:13:02,530 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 22:13:02,534 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:13:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 22:13:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 22:13:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 22:13:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 22:13:02,640 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-20 22:13:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:02,640 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 22:13:02,641 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:13:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 22:13:02,641 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 22:13:02,644 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:13:02,644 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:13:02,644 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:13:02,645 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:13:02,645 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:13:02,645 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:13:02,645 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:13:02,645 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 22:13:02,645 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:13:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 22:13:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 22:13:02,649 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:02,649 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:02,649 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1481761889, now seen corresponding path program 1 times [2018-01-20 22:13:02,649 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:02,649 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:02,651 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,651 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:02,651 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:02,661 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:02,676 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:13:02,676 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:13:02,676 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:13:02,676 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:13:02,677 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:13:02,677 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-20 22:13:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:02,684 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-20 22:13:02,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:13:02,684 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-20 22:13:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:02,687 INFO L225 Difference]: With dead ends: 72 [2018-01-20 22:13:02,687 INFO L226 Difference]: Without dead ends: 37 [2018-01-20 22:13:02,688 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:13:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-20 22:13:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-20 22:13:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-20 22:13:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-20 22:13:02,700 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2018-01-20 22:13:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:02,701 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-20 22:13:02,701 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:13:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-20 22:13:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 22:13:02,702 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:02,702 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:02,702 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:02,702 INFO L82 PathProgramCache]: Analyzing trace with hash 499012364, now seen corresponding path program 1 times [2018-01-20 22:13:02,702 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:02,702 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:02,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,704 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:02,704 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:02,717 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:02,755 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:13:02,755 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 22:13:02,757 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 22:13:02,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 22:13:02,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 22:13:02,758 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2018-01-20 22:13:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:02,820 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-20 22:13:02,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 22:13:02,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-20 22:13:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:02,824 INFO L225 Difference]: With dead ends: 66 [2018-01-20 22:13:02,824 INFO L226 Difference]: Without dead ends: 51 [2018-01-20 22:13:02,825 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 22:13:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-20 22:13:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-01-20 22:13:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-20 22:13:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-20 22:13:02,838 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 19 [2018-01-20 22:13:02,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:02,838 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-20 22:13:02,838 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 22:13:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-20 22:13:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-20 22:13:02,839 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:02,840 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:02,840 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:02,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1504830404, now seen corresponding path program 1 times [2018-01-20 22:13:02,840 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:02,841 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:02,842 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,842 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:02,842 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:02,864 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:02,921 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:02,921 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:02,935 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:02,966 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:03,059 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-20 22:13:03,059 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2018-01-20 22:13:03,059 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-20 22:13:03,060 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-20 22:13:03,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:13:03,060 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 7 states. [2018-01-20 22:13:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:03,245 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2018-01-20 22:13:03,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 22:13:03,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2018-01-20 22:13:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:03,247 INFO L225 Difference]: With dead ends: 104 [2018-01-20 22:13:03,247 INFO L226 Difference]: Without dead ends: 70 [2018-01-20 22:13:03,248 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:13:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-20 22:13:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2018-01-20 22:13:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-20 22:13:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-20 22:13:03,257 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 31 [2018-01-20 22:13:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:03,258 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-20 22:13:03,258 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-20 22:13:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-20 22:13:03,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-20 22:13:03,262 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:03,262 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:03,262 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:03,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1862415341, now seen corresponding path program 1 times [2018-01-20 22:13:03,262 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:03,263 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:03,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:03,264 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:03,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:03,290 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-01-20 22:13:03,361 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:03,361 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:03,372 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:03,408 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-01-20 22:13:03,520 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:03,523 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2018-01-20 22:13:03,524 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 22:13:03,524 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 22:13:03,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:13:03,525 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 9 states. [2018-01-20 22:13:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:03,761 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2018-01-20 22:13:03,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-20 22:13:03,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2018-01-20 22:13:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:03,763 INFO L225 Difference]: With dead ends: 133 [2018-01-20 22:13:03,763 INFO L226 Difference]: Without dead ends: 89 [2018-01-20 22:13:03,764 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:13:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-01-20 22:13:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2018-01-20 22:13:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-20 22:13:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2018-01-20 22:13:03,774 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 52 [2018-01-20 22:13:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:03,774 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2018-01-20 22:13:03,774 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 22:13:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2018-01-20 22:13:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-20 22:13:03,776 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:03,777 INFO L322 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:03,777 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1345357476, now seen corresponding path program 2 times [2018-01-20 22:13:03,777 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:03,777 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:03,778 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:03,779 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:03,779 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:03,807 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-01-20 22:13:03,922 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:03,923 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:03,934 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:03,953 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:03,986 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:03,990 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:03,995 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 118 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-01-20 22:13:04,092 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:04,092 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2018-01-20 22:13:04,093 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-20 22:13:04,093 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-20 22:13:04,093 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:13:04,094 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 12 states. [2018-01-20 22:13:04,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:04,400 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2018-01-20 22:13:04,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 22:13:04,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2018-01-20 22:13:04,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:04,402 INFO L225 Difference]: With dead ends: 185 [2018-01-20 22:13:04,402 INFO L226 Difference]: Without dead ends: 135 [2018-01-20 22:13:04,403 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:13:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-01-20 22:13:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2018-01-20 22:13:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-20 22:13:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2018-01-20 22:13:04,413 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 83 [2018-01-20 22:13:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:04,414 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2018-01-20 22:13:04,414 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-20 22:13:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2018-01-20 22:13:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-01-20 22:13:04,416 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:04,416 INFO L322 BasicCegarLoop]: trace histogram [15, 11, 11, 11, 11, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:04,416 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash -389182277, now seen corresponding path program 3 times [2018-01-20 22:13:04,416 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:04,416 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:04,417 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:04,418 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:04,418 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:04,452 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2018-01-20 22:13:04,615 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:04,615 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:04,623 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:04,642 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:04,649 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:04,655 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:04,662 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:04,670 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:04,671 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:04,677 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 183 proven. 21 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-01-20 22:13:04,788 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:04,788 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2018-01-20 22:13:04,788 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-20 22:13:04,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-20 22:13:04,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:13:04,789 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 12 states. [2018-01-20 22:13:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:05,136 INFO L93 Difference]: Finished difference Result 236 states and 269 transitions. [2018-01-20 22:13:05,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-20 22:13:05,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 119 [2018-01-20 22:13:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:05,138 INFO L225 Difference]: With dead ends: 236 [2018-01-20 22:13:05,139 INFO L226 Difference]: Without dead ends: 207 [2018-01-20 22:13:05,139 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-01-20 22:13:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-01-20 22:13:05,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 139. [2018-01-20 22:13:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-01-20 22:13:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2018-01-20 22:13:05,155 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 119 [2018-01-20 22:13:05,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:05,156 INFO L432 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2018-01-20 22:13:05,156 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-20 22:13:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2018-01-20 22:13:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-01-20 22:13:05,158 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:05,158 INFO L322 BasicCegarLoop]: trace histogram [22, 17, 17, 17, 17, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:05,158 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:05,158 INFO L82 PathProgramCache]: Analyzing trace with hash 349526166, now seen corresponding path program 4 times [2018-01-20 22:13:05,158 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:05,158 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:05,159 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:05,159 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:05,159 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:05,196 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-20 22:13:05,359 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:05,359 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:05,375 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:05,410 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:05,417 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 635 proven. 38 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-01-20 22:13:05,608 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:05,608 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2018-01-20 22:13:05,608 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-20 22:13:05,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-20 22:13:05,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:13:05,609 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand 18 states. [2018-01-20 22:13:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:05,943 INFO L93 Difference]: Finished difference Result 364 states and 420 transitions. [2018-01-20 22:13:05,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-20 22:13:05,943 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 160 [2018-01-20 22:13:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:05,946 INFO L225 Difference]: With dead ends: 364 [2018-01-20 22:13:05,946 INFO L226 Difference]: Without dead ends: 280 [2018-01-20 22:13:05,947 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2018-01-20 22:13:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-01-20 22:13:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 179. [2018-01-20 22:13:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-01-20 22:13:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 200 transitions. [2018-01-20 22:13:05,967 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 200 transitions. Word has length 160 [2018-01-20 22:13:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:05,968 INFO L432 AbstractCegarLoop]: Abstraction has 179 states and 200 transitions. [2018-01-20 22:13:05,968 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-20 22:13:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 200 transitions. [2018-01-20 22:13:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-01-20 22:13:05,972 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:05,972 INFO L322 BasicCegarLoop]: trace histogram [29, 23, 23, 23, 23, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:05,973 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2057287179, now seen corresponding path program 5 times [2018-01-20 22:13:05,973 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:05,973 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:05,974 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:05,974 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:05,974 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:06,009 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1631 trivial. 0 not checked. [2018-01-20 22:13:06,145 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:06,145 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:06,150 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:06,163 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,165 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,175 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,183 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,187 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,192 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,196 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,200 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,204 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,210 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:06,212 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:06,220 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 948 proven. 95 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2018-01-20 22:13:06,450 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:06,450 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2018-01-20 22:13:06,450 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-20 22:13:06,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-20 22:13:06,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2018-01-20 22:13:06,451 INFO L87 Difference]: Start difference. First operand 179 states and 200 transitions. Second operand 20 states. [2018-01-20 22:13:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:06,970 INFO L93 Difference]: Finished difference Result 394 states and 441 transitions. [2018-01-20 22:13:06,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-20 22:13:06,970 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2018-01-20 22:13:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:06,972 INFO L225 Difference]: With dead ends: 394 [2018-01-20 22:13:06,972 INFO L226 Difference]: Without dead ends: 231 [2018-01-20 22:13:06,973 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=1242, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:13:06,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-01-20 22:13:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 180. [2018-01-20 22:13:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-01-20 22:13:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 197 transitions. [2018-01-20 22:13:06,989 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 197 transitions. Word has length 201 [2018-01-20 22:13:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:06,989 INFO L432 AbstractCegarLoop]: Abstraction has 180 states and 197 transitions. [2018-01-20 22:13:06,989 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-20 22:13:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 197 transitions. [2018-01-20 22:13:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-01-20 22:13:06,992 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:06,992 INFO L322 BasicCegarLoop]: trace histogram [36, 29, 29, 29, 29, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:06,992 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:06,992 INFO L82 PathProgramCache]: Analyzing trace with hash 927615722, now seen corresponding path program 6 times [2018-01-20 22:13:06,992 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:06,992 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:06,993 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:06,993 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:06,993 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:07,023 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 2562 trivial. 0 not checked. [2018-01-20 22:13:07,194 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:07,194 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:07,202 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:07,222 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,224 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,227 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,229 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,233 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,235 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,240 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,245 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,253 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,259 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,265 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,269 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,275 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:07,277 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:07,284 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 764 proven. 60 refuted. 0 times theorem prover too weak. 1857 trivial. 0 not checked. [2018-01-20 22:13:07,497 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:07,497 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2018-01-20 22:13:07,497 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-20 22:13:07,498 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-20 22:13:07,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-01-20 22:13:07,498 INFO L87 Difference]: Start difference. First operand 180 states and 197 transitions. Second operand 17 states. [2018-01-20 22:13:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:07,834 INFO L93 Difference]: Finished difference Result 398 states and 451 transitions. [2018-01-20 22:13:07,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-20 22:13:07,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 242 [2018-01-20 22:13:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:07,836 INFO L225 Difference]: With dead ends: 398 [2018-01-20 22:13:07,837 INFO L226 Difference]: Without dead ends: 357 [2018-01-20 22:13:07,837 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2018-01-20 22:13:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-01-20 22:13:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 233. [2018-01-20 22:13:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-01-20 22:13:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 260 transitions. [2018-01-20 22:13:07,857 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 260 transitions. Word has length 242 [2018-01-20 22:13:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:07,858 INFO L432 AbstractCegarLoop]: Abstraction has 233 states and 260 transitions. [2018-01-20 22:13:07,858 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-20 22:13:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 260 transitions. [2018-01-20 22:13:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-01-20 22:13:07,861 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:07,861 INFO L322 BasicCegarLoop]: trace histogram [46, 38, 38, 38, 38, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:07,861 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:07,861 INFO L82 PathProgramCache]: Analyzing trace with hash -965692109, now seen corresponding path program 7 times [2018-01-20 22:13:07,861 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:07,862 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:07,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:07,863 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:07,863 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:07,904 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2018-01-20 22:13:08,190 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:08,190 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:08,197 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:08,268 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 2748 proven. 87 refuted. 0 times theorem prover too weak. 1612 trivial. 0 not checked. [2018-01-20 22:13:08,575 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:08,592 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2018-01-20 22:13:08,592 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-20 22:13:08,592 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-20 22:13:08,593 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:13:08,593 INFO L87 Difference]: Start difference. First operand 233 states and 260 transitions. Second operand 25 states. [2018-01-20 22:13:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:09,178 INFO L93 Difference]: Finished difference Result 553 states and 632 transitions. [2018-01-20 22:13:09,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-20 22:13:09,179 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 298 [2018-01-20 22:13:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:09,182 INFO L225 Difference]: With dead ends: 553 [2018-01-20 22:13:09,182 INFO L226 Difference]: Without dead ends: 439 [2018-01-20 22:13:09,184 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 22:13:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2018-01-20 22:13:09,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 283. [2018-01-20 22:13:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-01-20 22:13:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 313 transitions. [2018-01-20 22:13:09,209 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 313 transitions. Word has length 298 [2018-01-20 22:13:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:09,209 INFO L432 AbstractCegarLoop]: Abstraction has 283 states and 313 transitions. [2018-01-20 22:13:09,209 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-20 22:13:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 313 transitions. [2018-01-20 22:13:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-01-20 22:13:09,212 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:09,212 INFO L322 BasicCegarLoop]: trace histogram [56, 47, 47, 47, 47, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:09,212 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash -822628892, now seen corresponding path program 8 times [2018-01-20 22:13:09,213 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:09,213 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:09,214 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:09,214 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:09,214 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:09,255 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6665 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 6467 trivial. 0 not checked. [2018-01-20 22:13:09,609 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:09,610 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:09,616 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:09,636 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:09,670 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:09,676 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:09,683 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6665 backedges. 3802 proven. 60 refuted. 0 times theorem prover too weak. 2803 trivial. 0 not checked. [2018-01-20 22:13:09,879 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:09,879 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2018-01-20 22:13:09,880 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-20 22:13:09,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-20 22:13:09,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:13:09,880 INFO L87 Difference]: Start difference. First operand 283 states and 313 transitions. Second operand 24 states. [2018-01-20 22:13:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:10,360 INFO L93 Difference]: Finished difference Result 525 states and 580 transitions. [2018-01-20 22:13:10,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-20 22:13:10,361 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 354 [2018-01-20 22:13:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:10,364 INFO L225 Difference]: With dead ends: 525 [2018-01-20 22:13:10,364 INFO L226 Difference]: Without dead ends: 399 [2018-01-20 22:13:10,365 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:13:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-01-20 22:13:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 284. [2018-01-20 22:13:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-01-20 22:13:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 314 transitions. [2018-01-20 22:13:10,384 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 314 transitions. Word has length 354 [2018-01-20 22:13:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:10,385 INFO L432 AbstractCegarLoop]: Abstraction has 284 states and 314 transitions. [2018-01-20 22:13:10,385 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-20 22:13:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 314 transitions. [2018-01-20 22:13:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-01-20 22:13:10,387 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:10,387 INFO L322 BasicCegarLoop]: trace histogram [65, 55, 55, 55, 55, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:10,387 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:10,387 INFO L82 PathProgramCache]: Analyzing trace with hash -370507531, now seen corresponding path program 9 times [2018-01-20 22:13:10,387 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:10,387 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:10,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:10,388 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:10,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:10,437 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 8795 trivial. 0 not checked. [2018-01-20 22:13:10,790 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:10,790 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:10,803 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:10,827 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:10,830 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:10,834 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:10,838 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:10,843 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:10,848 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:10,854 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:10,861 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:10,868 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:10,869 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:10,875 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 1985 proven. 119 refuted. 0 times theorem prover too weak. 6936 trivial. 0 not checked. [2018-01-20 22:13:11,057 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:11,058 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-01-20 22:13:11,058 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-20 22:13:11,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-20 22:13:11,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2018-01-20 22:13:11,059 INFO L87 Difference]: Start difference. First operand 284 states and 314 transitions. Second operand 22 states. [2018-01-20 22:13:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:11,534 INFO L93 Difference]: Finished difference Result 636 states and 724 transitions. [2018-01-20 22:13:11,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-20 22:13:11,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 405 [2018-01-20 22:13:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:11,538 INFO L225 Difference]: With dead ends: 636 [2018-01-20 22:13:11,538 INFO L226 Difference]: Without dead ends: 583 [2018-01-20 22:13:11,539 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:13:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2018-01-20 22:13:11,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 347. [2018-01-20 22:13:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-01-20 22:13:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 390 transitions. [2018-01-20 22:13:11,567 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 390 transitions. Word has length 405 [2018-01-20 22:13:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:11,568 INFO L432 AbstractCegarLoop]: Abstraction has 347 states and 390 transitions. [2018-01-20 22:13:11,568 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-20 22:13:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 390 transitions. [2018-01-20 22:13:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2018-01-20 22:13:11,574 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:11,574 INFO L322 BasicCegarLoop]: trace histogram [78, 67, 67, 67, 67, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:11,574 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash 593814198, now seen corresponding path program 10 times [2018-01-20 22:13:11,575 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:11,575 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:11,576 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:11,576 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:11,576 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:11,630 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 12859 trivial. 0 not checked. [2018-01-20 22:13:12,262 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:12,262 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:12,268 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:12,385 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:12,398 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 7833 proven. 156 refuted. 0 times theorem prover too weak. 5167 trivial. 0 not checked. [2018-01-20 22:13:12,845 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:12,845 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2018-01-20 22:13:12,845 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-20 22:13:12,846 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-20 22:13:12,846 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:13:12,846 INFO L87 Difference]: Start difference. First operand 347 states and 390 transitions. Second operand 32 states. [2018-01-20 22:13:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:13,681 INFO L93 Difference]: Finished difference Result 824 states and 941 transitions. [2018-01-20 22:13:13,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-20 22:13:13,681 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 476 [2018-01-20 22:13:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:13,686 INFO L225 Difference]: With dead ends: 824 [2018-01-20 22:13:13,686 INFO L226 Difference]: Without dead ends: 677 [2018-01-20 22:13:13,688 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=2187, Unknown=0, NotChecked=0, Total=2652 [2018-01-20 22:13:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2018-01-20 22:13:13,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 407. [2018-01-20 22:13:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-01-20 22:13:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 454 transitions. [2018-01-20 22:13:13,724 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 454 transitions. Word has length 476 [2018-01-20 22:13:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:13,725 INFO L432 AbstractCegarLoop]: Abstraction has 407 states and 454 transitions. [2018-01-20 22:13:13,725 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-20 22:13:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 454 transitions. [2018-01-20 22:13:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-01-20 22:13:13,730 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:13,730 INFO L322 BasicCegarLoop]: trace histogram [91, 79, 79, 79, 79, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:13,730 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:13,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1155544977, now seen corresponding path program 11 times [2018-01-20 22:13:13,731 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:13,731 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:13,732 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:13,732 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:13,732 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:13,792 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18051 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 17697 trivial. 0 not checked. [2018-01-20 22:13:14,834 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:14,834 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:14,841 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:14,875 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:14,884 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:14,896 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:14,905 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:14,920 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:14,932 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:14,942 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:14,959 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:14,968 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:14,974 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:14,982 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18051 backedges. 10148 proven. 679 refuted. 0 times theorem prover too weak. 7224 trivial. 0 not checked. [2018-01-20 22:13:15,441 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:15,442 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 34 [2018-01-20 22:13:15,443 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-20 22:13:15,443 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-20 22:13:15,443 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:13:15,444 INFO L87 Difference]: Start difference. First operand 407 states and 454 transitions. Second operand 34 states. [2018-01-20 22:13:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:17,280 INFO L93 Difference]: Finished difference Result 728 states and 809 transitions. [2018-01-20 22:13:17,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-20 22:13:17,281 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 547 [2018-01-20 22:13:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:17,284 INFO L225 Difference]: With dead ends: 728 [2018-01-20 22:13:17,284 INFO L226 Difference]: Without dead ends: 569 [2018-01-20 22:13:17,286 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=661, Invalid=3761, Unknown=0, NotChecked=0, Total=4422 [2018-01-20 22:13:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2018-01-20 22:13:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 408. [2018-01-20 22:13:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2018-01-20 22:13:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 455 transitions. [2018-01-20 22:13:17,309 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 455 transitions. Word has length 547 [2018-01-20 22:13:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:17,310 INFO L432 AbstractCegarLoop]: Abstraction has 408 states and 455 transitions. [2018-01-20 22:13:17,310 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-20 22:13:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 455 transitions. [2018-01-20 22:13:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2018-01-20 22:13:17,313 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:17,313 INFO L322 BasicCegarLoop]: trace histogram [102, 89, 89, 89, 89, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:17,313 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:17,314 INFO L82 PathProgramCache]: Analyzing trace with hash -832911260, now seen corresponding path program 12 times [2018-01-20 22:13:17,314 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:17,314 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:17,314 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:17,314 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:17,314 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:17,355 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 22778 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 22362 trivial. 0 not checked. [2018-01-20 22:13:18,194 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:18,194 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:18,200 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:18,235 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,244 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,254 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,265 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,280 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,291 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,305 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,323 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,334 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,344 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,353 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,362 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,374 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,385 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,412 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,427 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,441 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,456 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,472 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,488 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:18,490 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:18,499 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22778 backedges. 4086 proven. 198 refuted. 0 times theorem prover too weak. 18494 trivial. 0 not checked. [2018-01-20 22:13:18,880 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:18,881 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2018-01-20 22:13:18,882 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-20 22:13:18,882 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-20 22:13:18,883 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:13:18,883 INFO L87 Difference]: Start difference. First operand 408 states and 455 transitions. Second operand 27 states. [2018-01-20 22:13:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:19,445 INFO L93 Difference]: Finished difference Result 931 states and 1064 transitions. [2018-01-20 22:13:19,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-20 22:13:19,446 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 608 [2018-01-20 22:13:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:19,453 INFO L225 Difference]: With dead ends: 931 [2018-01-20 22:13:19,453 INFO L226 Difference]: Without dead ends: 866 [2018-01-20 22:13:19,455 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:13:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2018-01-20 22:13:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 481. [2018-01-20 22:13:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2018-01-20 22:13:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 544 transitions. [2018-01-20 22:13:19,496 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 544 transitions. Word has length 608 [2018-01-20 22:13:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:19,498 INFO L432 AbstractCegarLoop]: Abstraction has 481 states and 544 transitions. [2018-01-20 22:13:19,498 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-20 22:13:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 544 transitions. [2018-01-20 22:13:19,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2018-01-20 22:13:19,504 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:19,505 INFO L322 BasicCegarLoop]: trace histogram [118, 104, 104, 104, 104, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:19,505 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash -658584109, now seen corresponding path program 13 times [2018-01-20 22:13:19,505 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:19,505 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:19,506 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,506 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:19,506 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:19,565 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30721 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 30238 trivial. 0 not checked. [2018-01-20 22:13:20,382 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:20,382 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:20,387 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:20,502 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30721 backedges. 17822 proven. 245 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2018-01-20 22:13:21,187 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:21,188 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24] total 39 [2018-01-20 22:13:21,189 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-20 22:13:21,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-20 22:13:21,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:13:21,189 INFO L87 Difference]: Start difference. First operand 481 states and 544 transitions. Second operand 39 states. [2018-01-20 22:13:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:22,055 INFO L93 Difference]: Finished difference Result 1147 states and 1310 transitions. [2018-01-20 22:13:22,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-20 22:13:22,056 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 694 [2018-01-20 22:13:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:22,059 INFO L225 Difference]: With dead ends: 1147 [2018-01-20 22:13:22,059 INFO L226 Difference]: Without dead ends: 967 [2018-01-20 22:13:22,061 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=687, Invalid=3345, Unknown=0, NotChecked=0, Total=4032 [2018-01-20 22:13:22,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2018-01-20 22:13:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 551. [2018-01-20 22:13:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2018-01-20 22:13:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 619 transitions. [2018-01-20 22:13:22,094 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 619 transitions. Word has length 694 [2018-01-20 22:13:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:22,095 INFO L432 AbstractCegarLoop]: Abstraction has 551 states and 619 transitions. [2018-01-20 22:13:22,095 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-20 22:13:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 619 transitions. [2018-01-20 22:13:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2018-01-20 22:13:22,099 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:22,099 INFO L322 BasicCegarLoop]: trace histogram [134, 119, 119, 119, 119, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:22,099 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -516686818, now seen corresponding path program 14 times [2018-01-20 22:13:22,100 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:22,100 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:22,100 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:22,100 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:22,101 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:22,144 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 39860 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 39305 trivial. 0 not checked. [2018-01-20 22:13:23,075 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:23,075 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:23,080 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:23,114 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,183 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,196 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:23,205 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 39860 backedges. 22346 proven. 198 refuted. 0 times theorem prover too weak. 17316 trivial. 0 not checked. [2018-01-20 22:13:23,718 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:23,734 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 38 [2018-01-20 22:13:23,735 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-20 22:13:23,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-20 22:13:23,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:13:23,736 INFO L87 Difference]: Start difference. First operand 551 states and 619 transitions. Second operand 38 states. [2018-01-20 22:13:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:24,547 INFO L93 Difference]: Finished difference Result 1077 states and 1200 transitions. [2018-01-20 22:13:24,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-20 22:13:24,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 780 [2018-01-20 22:13:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:24,550 INFO L225 Difference]: With dead ends: 1077 [2018-01-20 22:13:24,550 INFO L226 Difference]: Without dead ends: 885 [2018-01-20 22:13:24,552 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=690, Invalid=3216, Unknown=0, NotChecked=0, Total=3906 [2018-01-20 22:13:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2018-01-20 22:13:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 552. [2018-01-20 22:13:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2018-01-20 22:13:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 620 transitions. [2018-01-20 22:13:24,602 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 620 transitions. Word has length 780 [2018-01-20 22:13:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:24,603 INFO L432 AbstractCegarLoop]: Abstraction has 552 states and 620 transitions. [2018-01-20 22:13:24,603 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-20 22:13:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 620 transitions. [2018-01-20 22:13:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2018-01-20 22:13:24,611 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:24,611 INFO L322 BasicCegarLoop]: trace histogram [147, 131, 131, 131, 131, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:24,611 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:24,612 INFO L82 PathProgramCache]: Analyzing trace with hash -337943249, now seen corresponding path program 15 times [2018-01-20 22:13:24,612 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:24,612 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:24,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:24,613 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:24,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:24,676 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 48119 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 47487 trivial. 0 not checked. [2018-01-20 22:13:25,748 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:25,748 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:25,753 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:25,789 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,792 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,795 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,799 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,803 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,808 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,812 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,817 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,824 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,830 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,838 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,847 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,855 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:25,857 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:25,868 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 48119 backedges. 7307 proven. 297 refuted. 0 times theorem prover too weak. 40515 trivial. 0 not checked. [2018-01-20 22:13:26,398 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:26,399 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2018-01-20 22:13:26,399 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-20 22:13:26,400 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-20 22:13:26,400 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=729, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:13:26,400 INFO L87 Difference]: Start difference. First operand 552 states and 620 transitions. Second operand 32 states. [2018-01-20 22:13:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:27,041 INFO L93 Difference]: Finished difference Result 1283 states and 1471 transitions. [2018-01-20 22:13:27,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-20 22:13:27,041 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 851 [2018-01-20 22:13:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:27,046 INFO L225 Difference]: With dead ends: 1283 [2018-01-20 22:13:27,046 INFO L226 Difference]: Without dead ends: 1206 [2018-01-20 22:13:27,048 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2018-01-20 22:13:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2018-01-20 22:13:27,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 635. [2018-01-20 22:13:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2018-01-20 22:13:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 722 transitions. [2018-01-20 22:13:27,110 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 722 transitions. Word has length 851 [2018-01-20 22:13:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:27,111 INFO L432 AbstractCegarLoop]: Abstraction has 635 states and 722 transitions. [2018-01-20 22:13:27,111 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-20 22:13:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 722 transitions. [2018-01-20 22:13:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2018-01-20 22:13:27,121 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:27,121 INFO L322 BasicCegarLoop]: trace histogram [166, 149, 149, 149, 149, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:27,122 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:27,122 INFO L82 PathProgramCache]: Analyzing trace with hash -478055978, now seen corresponding path program 16 times [2018-01-20 22:13:27,122 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:27,122 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:27,123 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:27,123 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:27,123 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:27,193 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 61726 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 61012 trivial. 0 not checked. [2018-01-20 22:13:28,482 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:28,482 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:28,487 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:28,639 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:28,651 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 61726 backedges. 35127 proven. 354 refuted. 0 times theorem prover too weak. 26245 trivial. 0 not checked. [2018-01-20 22:13:29,808 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:29,808 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28] total 46 [2018-01-20 22:13:29,809 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-20 22:13:29,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-20 22:13:29,809 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2018-01-20 22:13:29,810 INFO L87 Difference]: Start difference. First operand 635 states and 722 transitions. Second operand 46 states. [2018-01-20 22:13:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:31,025 INFO L93 Difference]: Finished difference Result 1522 states and 1739 transitions. [2018-01-20 22:13:31,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-20 22:13:31,025 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 952 [2018-01-20 22:13:31,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:31,030 INFO L225 Difference]: With dead ends: 1522 [2018-01-20 22:13:31,030 INFO L226 Difference]: Without dead ends: 1309 [2018-01-20 22:13:31,032 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 927 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=952, Invalid=4748, Unknown=0, NotChecked=0, Total=5700 [2018-01-20 22:13:31,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2018-01-20 22:13:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 715. [2018-01-20 22:13:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2018-01-20 22:13:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 808 transitions. [2018-01-20 22:13:31,076 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 808 transitions. Word has length 952 [2018-01-20 22:13:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:31,077 INFO L432 AbstractCegarLoop]: Abstraction has 715 states and 808 transitions. [2018-01-20 22:13:31,077 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-20 22:13:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 808 transitions. [2018-01-20 22:13:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1054 [2018-01-20 22:13:31,085 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:31,086 INFO L322 BasicCegarLoop]: trace histogram [185, 167, 167, 167, 167, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:31,086 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash -216903191, now seen corresponding path program 17 times [2018-01-20 22:13:31,086 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:31,086 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:31,087 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:31,087 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:31,087 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:31,141 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 77036 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 76235 trivial. 0 not checked. [2018-01-20 22:13:32,610 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:32,610 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:32,614 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:32,657 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,659 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,661 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,662 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,665 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,669 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,672 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,674 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,676 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,678 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,685 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,688 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,691 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,694 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,698 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,700 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,705 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,711 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,719 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,727 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,737 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,748 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,761 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,778 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,794 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,813 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,833 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,859 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,885 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:32,888 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:32,898 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 77036 backedges. 42642 proven. 1892 refuted. 0 times theorem prover too weak. 32502 trivial. 0 not checked. [2018-01-20 22:13:33,692 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:33,692 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29] total 48 [2018-01-20 22:13:33,693 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-20 22:13:33,693 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-20 22:13:33,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1884, Unknown=0, NotChecked=0, Total=2256 [2018-01-20 22:13:33,694 INFO L87 Difference]: Start difference. First operand 715 states and 808 transitions. Second operand 48 states. [2018-01-20 22:13:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:35,196 INFO L93 Difference]: Finished difference Result 1782 states and 2008 transitions. [2018-01-20 22:13:35,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-01-20 22:13:35,196 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 1053 [2018-01-20 22:13:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:35,200 INFO L225 Difference]: With dead ends: 1782 [2018-01-20 22:13:35,200 INFO L226 Difference]: Without dead ends: 1053 [2018-01-20 22:13:35,203 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1120 GetRequests, 1027 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1265, Invalid=7665, Unknown=0, NotChecked=0, Total=8930 [2018-01-20 22:13:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2018-01-20 22:13:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 716. [2018-01-20 22:13:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2018-01-20 22:13:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 799 transitions. [2018-01-20 22:13:35,273 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 799 transitions. Word has length 1053 [2018-01-20 22:13:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:35,273 INFO L432 AbstractCegarLoop]: Abstraction has 716 states and 799 transitions. [2018-01-20 22:13:35,274 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-20 22:13:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 799 transitions. [2018-01-20 22:13:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2018-01-20 22:13:35,286 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:35,286 INFO L322 BasicCegarLoop]: trace histogram [200, 181, 181, 181, 181, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:35,287 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2138404130, now seen corresponding path program 18 times [2018-01-20 22:13:35,287 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:35,287 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:35,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,288 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:35,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:35,367 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 90247 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 89354 trivial. 0 not checked. [2018-01-20 22:13:37,160 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:37,160 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:37,165 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:37,210 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,213 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,215 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,218 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,221 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,225 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,229 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,234 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,239 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,245 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,252 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,258 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,265 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,272 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,281 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,290 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,299 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,306 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,314 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,323 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,333 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,341 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,352 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,361 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,372 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,381 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,393 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,407 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,422 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:37,424 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:37,433 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 90247 backedges. 11888 proven. 416 refuted. 0 times theorem prover too weak. 77943 trivial. 0 not checked. [2018-01-20 22:13:38,090 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:38,091 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2018-01-20 22:13:38,091 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-20 22:13:38,091 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-20 22:13:38,092 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=980, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:13:38,092 INFO L87 Difference]: Start difference. First operand 716 states and 799 transitions. Second operand 37 states. [2018-01-20 22:13:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:38,817 INFO L93 Difference]: Finished difference Result 1601 states and 1832 transitions. [2018-01-20 22:13:38,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-01-20 22:13:38,849 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1134 [2018-01-20 22:13:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:38,858 INFO L225 Difference]: With dead ends: 1601 [2018-01-20 22:13:38,858 INFO L226 Difference]: Without dead ends: 1512 [2018-01-20 22:13:38,861 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1169 GetRequests, 1120 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=590, Invalid=1960, Unknown=0, NotChecked=0, Total=2550 [2018-01-20 22:13:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2018-01-20 22:13:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 809. [2018-01-20 22:13:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2018-01-20 22:13:38,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 913 transitions. [2018-01-20 22:13:38,942 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 913 transitions. Word has length 1134 [2018-01-20 22:13:38,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:38,943 INFO L432 AbstractCegarLoop]: Abstraction has 809 states and 913 transitions. [2018-01-20 22:13:38,944 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-20 22:13:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 913 transitions. [2018-01-20 22:13:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1251 [2018-01-20 22:13:38,958 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:38,959 INFO L322 BasicCegarLoop]: trace histogram [222, 202, 202, 202, 202, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:38,959 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash -168576653, now seen corresponding path program 19 times [2018-01-20 22:13:38,959 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:38,960 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:38,960 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:38,960 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:38,961 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:39,047 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 111715 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 110725 trivial. 0 not checked. [2018-01-20 22:13:41,182 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:41,182 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:41,187 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:41,377 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 111715 backedges. 62640 proven. 483 refuted. 0 times theorem prover too weak. 48592 trivial. 0 not checked. [2018-01-20 22:13:42,349 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:42,349 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 53 [2018-01-20 22:13:42,350 INFO L409 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-01-20 22:13:42,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-01-20 22:13:42,351 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2246, Unknown=0, NotChecked=0, Total=2756 [2018-01-20 22:13:42,351 INFO L87 Difference]: Start difference. First operand 809 states and 913 transitions. Second operand 53 states. [2018-01-20 22:13:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:43,870 INFO L93 Difference]: Finished difference Result 1847 states and 2102 transitions. [2018-01-20 22:13:43,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-01-20 22:13:43,870 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 1250 [2018-01-20 22:13:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:43,875 INFO L225 Difference]: With dead ends: 1847 [2018-01-20 22:13:43,875 INFO L226 Difference]: Without dead ends: 1604 [2018-01-20 22:13:43,877 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1221 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1260, Invalid=6396, Unknown=0, NotChecked=0, Total=7656 [2018-01-20 22:13:43,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-01-20 22:13:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 899. [2018-01-20 22:13:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2018-01-20 22:13:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1009 transitions. [2018-01-20 22:13:43,950 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1009 transitions. Word has length 1250 [2018-01-20 22:13:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:43,951 INFO L432 AbstractCegarLoop]: Abstraction has 899 states and 1009 transitions. [2018-01-20 22:13:43,951 INFO L433 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-01-20 22:13:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1009 transitions. [2018-01-20 22:13:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1367 [2018-01-20 22:13:43,967 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:43,968 INFO L322 BasicCegarLoop]: trace histogram [244, 223, 223, 223, 223, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:43,968 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:43,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1398298024, now seen corresponding path program 20 times [2018-01-20 22:13:43,968 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:43,968 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:43,969 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:43,969 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:43,969 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:44,064 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-01-20 22:13:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 135483 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 134391 trivial. 0 not checked. [2018-01-20 22:13:46,691 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:46,691 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:46,696 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:46,748 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:46,863 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:46,888 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:46,900 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:46,902 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-20 22:13:46,903 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:13:46,904 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:13:46,905 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:13:46,905 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:13:46,905 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:13:46,905 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:13:46,905 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:13:46,905 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:13:46,905 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 22:13:46,905 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:13:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 22:13:46,906 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:13:46,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 10:13:46 BoogieIcfgContainer [2018-01-20 22:13:46,907 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 22:13:46,908 INFO L168 Benchmark]: Toolchain (without parser) took 45164.66 ms. Allocated memory was 306.2 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 265.5 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 434.9 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:46,910 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 306.2 MB. Free memory is still 269.5 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 22:13:46,910 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.98 ms. Allocated memory is still 306.2 MB. Free memory was 263.5 MB in the beginning and 255.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:46,910 INFO L168 Benchmark]: Boogie Preprocessor took 33.29 ms. Allocated memory is still 306.2 MB. Free memory was 255.5 MB in the beginning and 253.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:46,911 INFO L168 Benchmark]: RCFGBuilder took 194.68 ms. Allocated memory is still 306.2 MB. Free memory was 253.5 MB in the beginning and 238.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:46,911 INFO L168 Benchmark]: TraceAbstraction took 44751.69 ms. Allocated memory was 306.2 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 238.9 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 408.4 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:46,913 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 306.2 MB. Free memory is still 269.5 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 176.98 ms. Allocated memory is still 306.2 MB. Free memory was 263.5 MB in the beginning and 255.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 33.29 ms. Allocated memory is still 306.2 MB. Free memory was 255.5 MB in the beginning and 253.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 194.68 ms. Allocated memory is still 306.2 MB. Free memory was 253.5 MB in the beginning and 238.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 44751.69 ms. Allocated memory was 306.2 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 238.9 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 408.4 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: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 14]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 1367 with TraceHistMax 244, 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, 41 locations, 4 error locations. TIMEOUT Result, 44.2s OverallTime, 23 OverallIterations, 244 TraceHistogramMax, 14.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1217 SDtfs, 8622 SDslu, 14343 SDs, 0 SdLazy, 16118 SolverSat, 2073 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10902 GetRequests, 10050 SyntacticMatches, 0 SemanticMatches, 852 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10443 ImplicationChecksByTransitivity, 11.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=899occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 22 MinimizatonAttempts, 5416 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 19.6s InterpolantComputationTime, 20616 NumberOfCodeBlocks, 18158 NumberOfCodeBlocksAsserted, 174 NumberOfCheckSat, 20574 ConstructedInterpolants, 0 QuantifiedInterpolants, 21739974 SizeOfPredicates, 66 NumberOfNonLiveVariables, 13656 ConjunctsInSsa, 337 ConjunctsInUnsatCore, 42 InterpolantComputations, 3 PerfectInterpolantSequences, 1066615/1079094 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 23). Cancelled while IsEmpty was searching accepting run (input had 41 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 41 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=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: 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/ArraysWithLenghtAtDeclaration_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_22-13-46-922.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysWithLenghtAtDeclaration_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_22-13-46-922.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysWithLenghtAtDeclaration_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_22-13-46-922.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysWithLenghtAtDeclaration_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_22-13-46-922.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysWithLenghtAtDeclaration_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_22-13-46-922.csv Completed graceful shutdown