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/memsetNonZero2_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:44:04,755 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:44:04,758 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:44:04,770 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:44:04,770 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:44:04,771 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:44:04,772 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:44:04,773 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:44:04,775 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:44:04,776 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:44:04,777 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:44:04,777 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:44:04,778 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:44:04,778 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:44:04,779 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:44:04,782 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:44:04,784 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:44:04,786 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:44:04,788 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:44:04,789 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:44:04,791 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:44:04,792 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:44:04,792 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:44:04,793 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:44:04,794 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:44:04,795 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:44:04,796 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:44:04,796 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:44:04,797 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:44:04,797 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:44:04,798 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:44:04,798 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:44:04,808 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:44:04,808 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:44:04,809 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:44:04,809 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:44:04,809 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:44:04,810 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:44:04,810 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:44:04,811 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:44:04,811 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:44:04,811 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:44:04,811 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:44:04,811 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:44:04,811 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:44:04,812 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:44:04,812 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:44:04,812 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:44:04,812 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:44:04,812 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:44:04,813 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:44:04,813 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:44:04,813 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:44:04,813 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:44:04,813 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:44:04,814 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:44:04,814 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:44:04,814 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:44:04,814 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:44:04,815 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:44:04,815 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:44:04,815 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:44:04,815 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:44:04,815 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:44:04,815 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:44:04,816 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:44:04,816 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:44:04,817 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:44:04,817 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:44:04,851 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:44:04,864 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:44:04,868 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:44:04,870 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:44:04,870 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:44:04,871 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memsetNonZero2_true-valid-memsafety_true-termination.c [2018-01-23 14:44:04,996 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:44:05,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:44:05,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:44:05,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:44:05,008 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:44:05,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:05,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4642b9e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05, skipping insertion in model container [2018-01-23 14:44:05,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:05,030 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:44:05,049 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:44:05,158 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:44:05,173 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:44:05,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05 WrapperNode [2018-01-23 14:44:05,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:44:05,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:44:05,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:44:05,181 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:44:05,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05" (1/1) ... [2018-01-23 14:44:05,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05" (1/1) ... [2018-01-23 14:44:05,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05" (1/1) ... [2018-01-23 14:44:05,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05" (1/1) ... [2018-01-23 14:44:05,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05" (1/1) ... [2018-01-23 14:44:05,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05" (1/1) ... [2018-01-23 14:44:05,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05" (1/1) ... [2018-01-23 14:44:05,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:44:05,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:44:05,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:44:05,216 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:44:05,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:44:05,264 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:44:05,264 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:44:05,264 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:44:05,264 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:44:05,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:44:05,265 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:44:05,265 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-23 14:44:05,265 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-23 14:44:05,265 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-23 14:44:05,265 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:44:05,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:44:05,266 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:44:05,389 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:44:05,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:44:05 BoogieIcfgContainer [2018-01-23 14:44:05,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:44:05,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:44:05,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:44:05,393 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:44:05,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:44:04" (1/3) ... [2018-01-23 14:44:05,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff36d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:44:05, skipping insertion in model container [2018-01-23 14:44:05,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:05" (2/3) ... [2018-01-23 14:44:05,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff36d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:44:05, skipping insertion in model container [2018-01-23 14:44:05,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:44:05" (3/3) ... [2018-01-23 14:44:05,396 INFO L105 eAbstractionObserver]: Analyzing ICFG memsetNonZero2_true-valid-memsafety_true-termination.c [2018-01-23 14:44:05,404 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:44:05,410 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-23 14:44:05,447 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:44:05,447 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:44:05,447 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:44:05,447 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:44:05,447 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:44:05,448 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:44:05,448 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:44:05,448 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:44:05,449 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:44:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-23 14:44:05,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:44:05,478 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:05,479 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:44:05,480 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:44:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash 50935, now seen corresponding path program 1 times [2018-01-23 14:44:05,487 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:05,488 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:05,542 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,542 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:05,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:05,601 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:44:05,607 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:44:05,613 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:44:05,613 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:44:05,614 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:44:05,614 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:44:05,614 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:44:05,614 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:44:05,614 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:44:05,614 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:44:05,615 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:44:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-23 14:44:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:44:05,617 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:05,617 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:05,617 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:05,618 INFO L82 PathProgramCache]: Analyzing trace with hash 457189328, now seen corresponding path program 1 times [2018-01-23 14:44:05,618 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:05,618 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:05,620 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,620 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:05,620 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:05,654 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:05,753 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:44:05,754 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:44:05,755 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:44:05,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:44:05,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:44:05,773 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2018-01-23 14:44:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:05,825 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:44:05,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:44:05,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-23 14:44:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:05,838 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:44:05,839 INFO L226 Difference]: Without dead ends: 19 [2018-01-23 14:44:05,906 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:44:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-23 14:44:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-23 14:44:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-23 14:44:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-23 14:44:05,935 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-01-23 14:44:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:05,936 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-23 14:44:05,936 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:44:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-23 14:44:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-23 14:44:05,936 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:05,937 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:05,937 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash -114007861, now seen corresponding path program 1 times [2018-01-23 14:44:05,937 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:05,937 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:05,938 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,938 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:05,938 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:05,954 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,034 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:06,034 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:06,045 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:06,072 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,186 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:06,187 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-01-23 14:44:06,187 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:44:06,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:44:06,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:44:06,188 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2018-01-23 14:44:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:06,230 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-01-23 14:44:06,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:44:06,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-01-23 14:44:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:06,232 INFO L225 Difference]: With dead ends: 29 [2018-01-23 14:44:06,232 INFO L226 Difference]: Without dead ends: 20 [2018-01-23 14:44:06,234 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:44:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-01-23 14:44:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-01-23 14:44:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-01-23 14:44:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-01-23 14:44:06,238 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-01-23 14:44:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:06,239 INFO L432 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-01-23 14:44:06,239 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:44:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-01-23 14:44:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:44:06,240 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:06,240 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:06,240 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash -641251536, now seen corresponding path program 2 times [2018-01-23 14:44:06,240 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:06,241 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:06,242 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,242 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:06,242 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:06,259 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,320 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:06,321 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:06,331 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:06,345 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:06,349 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:06,349 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:06,351 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,427 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:06,427 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-01-23 14:44:06,428 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:44:06,428 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:44:06,428 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:44:06,428 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 10 states. [2018-01-23 14:44:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:06,462 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-01-23 14:44:06,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:44:06,462 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-01-23 14:44:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:06,463 INFO L225 Difference]: With dead ends: 30 [2018-01-23 14:44:06,463 INFO L226 Difference]: Without dead ends: 21 [2018-01-23 14:44:06,464 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:44:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-01-23 14:44:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-01-23 14:44:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-01-23 14:44:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-01-23 14:44:06,468 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-01-23 14:44:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:06,468 INFO L432 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-01-23 14:44:06,469 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:44:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-01-23 14:44:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-23 14:44:06,469 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:06,470 INFO L322 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:06,470 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash 194063723, now seen corresponding path program 3 times [2018-01-23 14:44:06,470 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:06,470 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:06,471 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,472 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:06,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:06,486 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,570 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:06,570 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:06,575 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:06,586 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:06,589 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:06,590 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:06,591 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:06,593 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,690 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:06,690 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-01-23 14:44:06,691 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-23 14:44:06,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-23 14:44:06,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:44:06,692 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2018-01-23 14:44:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:06,759 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-01-23 14:44:06,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-23 14:44:06,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2018-01-23 14:44:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:06,761 INFO L225 Difference]: With dead ends: 31 [2018-01-23 14:44:06,761 INFO L226 Difference]: Without dead ends: 22 [2018-01-23 14:44:06,761 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:44:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-01-23 14:44:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-01-23 14:44:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-01-23 14:44:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-01-23 14:44:06,766 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-01-23 14:44:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:06,766 INFO L432 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-01-23 14:44:06,766 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-23 14:44:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-01-23 14:44:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-23 14:44:06,767 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:06,767 INFO L322 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:06,767 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:06,767 INFO L82 PathProgramCache]: Analyzing trace with hash 319032976, now seen corresponding path program 4 times [2018-01-23 14:44:06,768 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:06,768 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:06,769 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,769 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:06,769 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:06,784 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,889 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:06,889 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:06,897 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:06,924 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:06,927 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,037 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:07,037 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-01-23 14:44:07,037 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:44:07,038 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:44:07,038 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:44:07,038 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2018-01-23 14:44:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:07,100 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-01-23 14:44:07,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:44:07,102 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2018-01-23 14:44:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:07,103 INFO L225 Difference]: With dead ends: 32 [2018-01-23 14:44:07,103 INFO L226 Difference]: Without dead ends: 23 [2018-01-23 14:44:07,104 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:44:07,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-23 14:44:07,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-23 14:44:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-23 14:44:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-01-23 14:44:07,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-01-23 14:44:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:07,108 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-01-23 14:44:07,108 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:44:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-01-23 14:44:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-23 14:44:07,109 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:07,109 INFO L322 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:07,109 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:07,110 INFO L82 PathProgramCache]: Analyzing trace with hash -101887477, now seen corresponding path program 5 times [2018-01-23 14:44:07,110 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:07,110 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:07,111 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,111 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:07,111 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:07,124 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,194 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:07,194 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:07,203 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:07,208 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:07,210 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:07,211 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:07,216 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:07,217 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:07,219 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,319 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:07,319 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-01-23 14:44:07,319 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:44:07,319 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:44:07,320 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:44:07,320 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 16 states. [2018-01-23 14:44:07,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:07,354 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:44:07,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:44:07,355 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2018-01-23 14:44:07,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:07,355 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:44:07,356 INFO L226 Difference]: Without dead ends: 24 [2018-01-23 14:44:07,356 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:44:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-23 14:44:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-23 14:44:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-23 14:44:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-01-23 14:44:07,360 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-01-23 14:44:07,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:07,360 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-01-23 14:44:07,360 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:44:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-01-23 14:44:07,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-23 14:44:07,361 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:07,361 INFO L322 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:07,361 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:07,361 INFO L82 PathProgramCache]: Analyzing trace with hash -265519632, now seen corresponding path program 6 times [2018-01-23 14:44:07,361 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:07,362 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:07,363 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,363 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:07,363 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:07,377 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,480 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:07,481 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:07,490 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:07,498 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:07,500 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:07,501 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:07,502 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:07,503 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:07,504 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,576 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:07,576 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-01-23 14:44:07,576 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-23 14:44:07,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-23 14:44:07,577 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:44:07,577 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 18 states. [2018-01-23 14:44:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:07,618 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-23 14:44:07,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:44:07,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2018-01-23 14:44:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:07,620 INFO L225 Difference]: With dead ends: 34 [2018-01-23 14:44:07,620 INFO L226 Difference]: Without dead ends: 25 [2018-01-23 14:44:07,620 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:44:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-23 14:44:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-23 14:44:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-23 14:44:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-01-23 14:44:07,625 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-01-23 14:44:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:07,625 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-01-23 14:44:07,625 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-23 14:44:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-01-23 14:44:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-23 14:44:07,626 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:07,626 INFO L322 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:07,626 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1043149141, now seen corresponding path program 7 times [2018-01-23 14:44:07,627 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:07,628 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:07,628 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,629 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:07,629 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:07,641 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,784 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:07,784 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:07,794 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:07,808 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,892 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:07,892 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-01-23 14:44:07,892 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:44:07,893 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:44:07,893 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:44:07,893 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 20 states. [2018-01-23 14:44:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:07,967 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-01-23 14:44:07,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:44:07,968 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2018-01-23 14:44:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:07,969 INFO L225 Difference]: With dead ends: 35 [2018-01-23 14:44:07,969 INFO L226 Difference]: Without dead ends: 26 [2018-01-23 14:44:07,969 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:44:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-23 14:44:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-01-23 14:44:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-23 14:44:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-01-23 14:44:07,974 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-01-23 14:44:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:07,974 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-01-23 14:44:07,974 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:44:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-01-23 14:44:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-23 14:44:07,975 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:07,975 INFO L322 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:07,976 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:07,976 INFO L82 PathProgramCache]: Analyzing trace with hash 620139856, now seen corresponding path program 8 times [2018-01-23 14:44:07,976 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:07,976 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:07,977 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,977 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:07,977 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:07,989 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,146 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:08,146 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:08,155 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:08,164 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:08,168 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:08,168 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:08,170 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,264 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:08,278 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-01-23 14:44:08,279 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:44:08,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:44:08,279 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:44:08,279 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2018-01-23 14:44:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:08,312 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-01-23 14:44:08,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:44:08,312 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2018-01-23 14:44:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:08,313 INFO L225 Difference]: With dead ends: 36 [2018-01-23 14:44:08,313 INFO L226 Difference]: Without dead ends: 27 [2018-01-23 14:44:08,314 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:44:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-23 14:44:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-01-23 14:44:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-23 14:44:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-01-23 14:44:08,318 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-01-23 14:44:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:08,318 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-01-23 14:44:08,318 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:44:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-01-23 14:44:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-23 14:44:08,319 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:08,319 INFO L322 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:08,319 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:08,320 INFO L82 PathProgramCache]: Analyzing trace with hash 642491211, now seen corresponding path program 9 times [2018-01-23 14:44:08,320 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:08,320 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:08,321 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,321 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:08,321 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:08,331 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,484 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:08,485 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:08,492 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:08,502 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,504 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,505 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,513 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,514 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,516 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,516 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:08,519 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,623 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:08,623 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-01-23 14:44:08,623 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:44:08,624 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:44:08,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:44:08,624 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2018-01-23 14:44:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:08,671 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-01-23 14:44:08,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:44:08,671 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2018-01-23 14:44:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:08,672 INFO L225 Difference]: With dead ends: 37 [2018-01-23 14:44:08,672 INFO L226 Difference]: Without dead ends: 28 [2018-01-23 14:44:08,672 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=368, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:44:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-01-23 14:44:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-01-23 14:44:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-23 14:44:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-01-23 14:44:08,675 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-01-23 14:44:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:08,675 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-01-23 14:44:08,675 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:44:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-01-23 14:44:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-23 14:44:08,676 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:08,676 INFO L322 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:08,676 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:08,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1335383216, now seen corresponding path program 10 times [2018-01-23 14:44:08,676 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:08,677 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:08,677 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,677 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:08,677 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:08,688 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,859 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:08,859 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:08,864 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:08,874 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:08,876 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,976 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:08,976 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-01-23 14:44:08,977 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-23 14:44:08,977 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-23 14:44:08,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=394, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:44:08,977 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 26 states. [2018-01-23 14:44:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:09,013 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-01-23 14:44:09,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:44:09,013 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 27 [2018-01-23 14:44:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:09,014 INFO L225 Difference]: With dead ends: 38 [2018-01-23 14:44:09,014 INFO L226 Difference]: Without dead ends: 29 [2018-01-23 14:44:09,014 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:44:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-23 14:44:09,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-23 14:44:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-23 14:44:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-01-23 14:44:09,018 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-01-23 14:44:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:09,019 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-01-23 14:44:09,019 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-23 14:44:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-01-23 14:44:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:44:09,020 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:09,020 INFO L322 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:09,020 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:09,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1340198891, now seen corresponding path program 11 times [2018-01-23 14:44:09,021 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:09,021 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:09,021 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,022 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:09,022 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:09,034 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,146 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:09,146 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:09,151 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:09,155 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:09,156 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:09,157 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:09,158 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:09,159 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:09,160 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:09,164 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:09,165 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:09,167 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,282 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:09,282 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-23 14:44:09,283 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:44:09,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:44:09,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=459, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:44:09,283 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-01-23 14:44:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:09,324 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-01-23 14:44:09,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:44:09,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-01-23 14:44:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:09,326 INFO L225 Difference]: With dead ends: 39 [2018-01-23 14:44:09,326 INFO L226 Difference]: Without dead ends: 30 [2018-01-23 14:44:09,326 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:44:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-23 14:44:09,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-23 14:44:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-23 14:44:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-01-23 14:44:09,330 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-01-23 14:44:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:09,331 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-01-23 14:44:09,331 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:44:09,331 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-01-23 14:44:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-23 14:44:09,332 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:09,332 INFO L322 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:09,332 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1489484816, now seen corresponding path program 12 times [2018-01-23 14:44:09,332 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:09,332 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:09,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,333 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:09,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:09,343 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,600 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:09,600 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:09,607 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:09,615 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,618 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,619 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,620 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,621 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,623 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,624 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,624 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:09,627 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,770 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:09,770 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2018-01-23 14:44:09,770 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-23 14:44:09,771 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-23 14:44:09,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=529, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:44:09,771 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-01-23 14:44:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:09,815 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-01-23 14:44:09,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:44:09,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-01-23 14:44:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:09,816 INFO L225 Difference]: With dead ends: 40 [2018-01-23 14:44:09,816 INFO L226 Difference]: Without dead ends: 31 [2018-01-23 14:44:09,817 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=572, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:44:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-23 14:44:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-23 14:44:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-23 14:44:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-01-23 14:44:09,821 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-01-23 14:44:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:09,821 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-01-23 14:44:09,822 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-23 14:44:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-01-23 14:44:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-23 14:44:09,822 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:09,822 INFO L322 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:09,822 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:09,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1822381195, now seen corresponding path program 13 times [2018-01-23 14:44:09,823 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:09,823 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:09,823 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,823 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:09,823 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:09,832 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,979 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:09,979 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:09,984 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:10,009 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:10,164 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:10,165 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-01-23 14:44:10,165 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-23 14:44:10,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-23 14:44:10,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=604, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:44:10,165 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 32 states. [2018-01-23 14:44:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:10,204 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-01-23 14:44:10,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:44:10,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 30 [2018-01-23 14:44:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:10,205 INFO L225 Difference]: With dead ends: 41 [2018-01-23 14:44:10,205 INFO L226 Difference]: Without dead ends: 32 [2018-01-23 14:44:10,206 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=650, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:44:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-23 14:44:10,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-23 14:44:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-23 14:44:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-01-23 14:44:10,209 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-01-23 14:44:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:10,209 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-01-23 14:44:10,209 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-23 14:44:10,209 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-01-23 14:44:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:44:10,210 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:10,210 INFO L322 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:10,210 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:10,210 INFO L82 PathProgramCache]: Analyzing trace with hash -742732944, now seen corresponding path program 14 times [2018-01-23 14:44:10,210 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:10,210 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:10,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:10,211 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:10,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:10,220 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:10,519 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:10,519 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:10,526 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:10,537 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:10,541 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:10,542 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:10,544 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:10,733 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:10,733 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-01-23 14:44:10,734 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:44:10,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:44:10,734 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=684, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:44:10,734 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 34 states. [2018-01-23 14:44:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:10,816 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-01-23 14:44:10,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-23 14:44:10,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 31 [2018-01-23 14:44:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:10,818 INFO L225 Difference]: With dead ends: 42 [2018-01-23 14:44:10,818 INFO L226 Difference]: Without dead ends: 33 [2018-01-23 14:44:10,819 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=457, Invalid=733, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:44:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-23 14:44:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-23 14:44:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-23 14:44:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-01-23 14:44:10,823 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-01-23 14:44:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:10,823 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-01-23 14:44:10,823 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:44:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-01-23 14:44:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-23 14:44:10,824 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:10,824 INFO L322 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:10,825 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1343107371, now seen corresponding path program 15 times [2018-01-23 14:44:10,825 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:10,825 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:10,826 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:10,826 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:10,826 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:10,835 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:11,011 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:11,011 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:11,018 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:11,026 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:11,028 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:11,029 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:11,030 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:11,031 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:11,032 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:11,034 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:11,035 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:11,036 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:11,036 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:11,038 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:11,195 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:11,195 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-01-23 14:44:11,195 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:44:11,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:44:11,196 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:44:11,196 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 36 states. [2018-01-23 14:44:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:11,247 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-01-23 14:44:11,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-23 14:44:11,247 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2018-01-23 14:44:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:11,248 INFO L225 Difference]: With dead ends: 43 [2018-01-23 14:44:11,248 INFO L226 Difference]: Without dead ends: 34 [2018-01-23 14:44:11,248 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=511, Invalid=821, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:44:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-23 14:44:11,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-23 14:44:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-23 14:44:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-01-23 14:44:11,251 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-01-23 14:44:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:11,251 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-01-23 14:44:11,252 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:44:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-01-23 14:44:11,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:44:11,252 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:11,252 INFO L322 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:11,252 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:11,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1579647696, now seen corresponding path program 16 times [2018-01-23 14:44:11,252 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:11,253 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:11,253 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:11,254 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:11,254 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:11,264 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:11,439 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:11,439 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:11,450 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:11,463 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:11,465 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:11,655 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:11,655 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2018-01-23 14:44:11,655 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:44:11,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:44:11,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=859, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:44:11,656 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 38 states. [2018-01-23 14:44:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:11,705 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-01-23 14:44:11,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:44:11,705 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 33 [2018-01-23 14:44:11,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:11,706 INFO L225 Difference]: With dead ends: 44 [2018-01-23 14:44:11,706 INFO L226 Difference]: Without dead ends: 35 [2018-01-23 14:44:11,707 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=568, Invalid=914, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:44:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-23 14:44:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-23 14:44:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-23 14:44:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-01-23 14:44:11,711 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-01-23 14:44:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:11,711 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-01-23 14:44:11,711 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:44:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-01-23 14:44:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-23 14:44:11,712 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:11,712 INFO L322 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:11,712 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash 322463179, now seen corresponding path program 17 times [2018-01-23 14:44:11,712 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:11,712 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:11,713 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:11,713 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:11,713 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:11,724 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:12,129 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:12,129 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:12,135 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:12,140 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,146 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,155 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,160 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,163 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,173 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,186 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,187 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,188 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,192 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,194 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:12,196 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:12,778 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:12,778 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-01-23 14:44:12,778 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:44:12,778 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:44:12,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=954, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:44:12,779 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 40 states. [2018-01-23 14:44:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:12,820 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-01-23 14:44:12,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:44:12,821 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 34 [2018-01-23 14:44:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:12,822 INFO L225 Difference]: With dead ends: 45 [2018-01-23 14:44:12,822 INFO L226 Difference]: Without dead ends: 36 [2018-01-23 14:44:12,822 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=628, Invalid=1012, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:44:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-23 14:44:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-23 14:44:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-23 14:44:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-01-23 14:44:12,826 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-01-23 14:44:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:12,827 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-01-23 14:44:12,827 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:44:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-01-23 14:44:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-23 14:44:12,828 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:12,828 INFO L322 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:12,828 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:12,828 INFO L82 PathProgramCache]: Analyzing trace with hash 4448816, now seen corresponding path program 18 times [2018-01-23 14:44:12,828 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:12,828 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:12,829 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:12,829 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:12,829 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:12,838 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:13,058 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:13,058 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:13,065 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:13,073 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,075 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,077 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,080 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,081 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,082 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,083 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,084 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,086 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,087 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:13,088 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:13,090 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:13,459 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:13,459 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2018-01-23 14:44:13,460 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-23 14:44:13,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-23 14:44:13,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=1054, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:44:13,461 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 42 states. [2018-01-23 14:44:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:13,518 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-01-23 14:44:13,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-23 14:44:13,519 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 35 [2018-01-23 14:44:13,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:13,519 INFO L225 Difference]: With dead ends: 46 [2018-01-23 14:44:13,520 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:44:13,520 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=691, Invalid=1115, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:44:13,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:44:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:44:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:44:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-01-23 14:44:13,525 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-01-23 14:44:13,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:13,525 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-01-23 14:44:13,525 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-23 14:44:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-01-23 14:44:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:44:13,526 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:13,526 INFO L322 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:13,526 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1264061845, now seen corresponding path program 19 times [2018-01-23 14:44:13,527 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:13,527 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:13,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:13,528 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:13,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:13,535 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:13,883 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:13,883 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:13,894 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:13,911 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:14,208 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:14,209 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2018-01-23 14:44:14,209 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-23 14:44:14,209 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-23 14:44:14,209 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1159, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:44:14,210 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 44 states. [2018-01-23 14:44:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:14,254 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-01-23 14:44:14,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:44:14,255 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 36 [2018-01-23 14:44:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:14,255 INFO L225 Difference]: With dead ends: 47 [2018-01-23 14:44:14,255 INFO L226 Difference]: Without dead ends: 38 [2018-01-23 14:44:14,256 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=757, Invalid=1223, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:44:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-23 14:44:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-23 14:44:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-23 14:44:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-01-23 14:44:14,259 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-01-23 14:44:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:14,259 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-01-23 14:44:14,259 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-23 14:44:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-01-23 14:44:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-23 14:44:14,260 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:14,260 INFO L322 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:14,260 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:14,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1933186672, now seen corresponding path program 20 times [2018-01-23 14:44:14,260 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:14,261 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:14,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:14,261 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:14,262 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:14,272 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:14,500 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:14,501 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 [2018-01-23 14:44:14,506 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:14,513 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:14,518 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:14,519 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:14,520 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:14,825 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:14,826 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-01-23 14:44:14,826 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-23 14:44:14,826 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-23 14:44:14,827 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=1269, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:44:14,827 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 46 states. [2018-01-23 14:44:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:14,890 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-01-23 14:44:14,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:44:14,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 37 [2018-01-23 14:44:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:14,891 INFO L225 Difference]: With dead ends: 48 [2018-01-23 14:44:14,891 INFO L226 Difference]: Without dead ends: 39 [2018-01-23 14:44:14,892 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=826, Invalid=1336, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:44:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-23 14:44:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-23 14:44:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-23 14:44:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-01-23 14:44:14,896 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-01-23 14:44:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:14,896 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-01-23 14:44:14,896 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-23 14:44:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-01-23 14:44:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-23 14:44:14,897 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:14,897 INFO L322 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:14,897 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1201219829, now seen corresponding path program 21 times [2018-01-23 14:44:14,897 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:14,897 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:14,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:14,898 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:14,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:14,908 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:15,167 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:15,167 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 [2018-01-23 14:44:15,172 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:15,180 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,181 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,182 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,183 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,184 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,185 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,186 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,187 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,188 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,190 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,191 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,192 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:15,192 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:15,194 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:15,404 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:15,405 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2018-01-23 14:44:15,405 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:44:15,405 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:44:15,406 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=1384, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:44:15,406 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 48 states. [2018-01-23 14:44:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:15,463 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-01-23 14:44:15,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:44:15,463 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 38 [2018-01-23 14:44:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:15,463 INFO L225 Difference]: With dead ends: 49 [2018-01-23 14:44:15,463 INFO L226 Difference]: Without dead ends: 40 [2018-01-23 14:44:15,464 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=898, Invalid=1454, Unknown=0, NotChecked=0, Total=2352 [2018-01-23 14:44:15,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-23 14:44:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-23 14:44:15,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-23 14:44:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-01-23 14:44:15,468 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-01-23 14:44:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:15,468 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-01-23 14:44:15,468 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:44:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-01-23 14:44:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-23 14:44:15,469 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:15,469 INFO L322 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:15,469 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:15,469 INFO L82 PathProgramCache]: Analyzing trace with hash 14915824, now seen corresponding path program 22 times [2018-01-23 14:44:15,469 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:15,469 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:15,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:15,470 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:15,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:15,476 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:15,777 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:15,777 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:15,782 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:15,795 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:15,796 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:16,037 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:16,038 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2018-01-23 14:44:16,038 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-23 14:44:16,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-23 14:44:16,039 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=1504, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:44:16,039 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 50 states. [2018-01-23 14:44:16,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:16,126 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-01-23 14:44:16,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-23 14:44:16,126 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 39 [2018-01-23 14:44:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:16,127 INFO L225 Difference]: With dead ends: 50 [2018-01-23 14:44:16,127 INFO L226 Difference]: Without dead ends: 41 [2018-01-23 14:44:16,127 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=973, Invalid=1577, Unknown=0, NotChecked=0, Total=2550 [2018-01-23 14:44:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-23 14:44:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-23 14:44:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:44:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-01-23 14:44:16,131 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-01-23 14:44:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:16,132 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-01-23 14:44:16,132 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-23 14:44:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-01-23 14:44:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-23 14:44:16,132 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:16,133 INFO L322 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:16,133 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:16,133 INFO L82 PathProgramCache]: Analyzing trace with hash -939584597, now seen corresponding path program 23 times [2018-01-23 14:44:16,133 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:16,133 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:16,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:16,134 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:16,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:16,141 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:16,431 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:16,431 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:16,436 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:16,439 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,440 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,441 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,441 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,442 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,443 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,444 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,444 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,445 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,446 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,447 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,448 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,451 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,452 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:16,459 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:16,711 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:16,711 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2018-01-23 14:44:16,711 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-23 14:44:16,712 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-23 14:44:16,712 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=1629, Unknown=0, NotChecked=0, Total=2652 [2018-01-23 14:44:16,712 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 52 states. [2018-01-23 14:44:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:16,783 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-01-23 14:44:16,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:44:16,783 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 40 [2018-01-23 14:44:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:16,784 INFO L225 Difference]: With dead ends: 51 [2018-01-23 14:44:16,784 INFO L226 Difference]: Without dead ends: 42 [2018-01-23 14:44:16,784 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1051, Invalid=1705, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:44:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-23 14:44:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-23 14:44:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-23 14:44:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-01-23 14:44:16,787 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-01-23 14:44:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:16,787 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-01-23 14:44:16,787 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-23 14:44:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-01-23 14:44:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-23 14:44:16,787 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:16,787 INFO L322 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:16,787 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:16,788 INFO L82 PathProgramCache]: Analyzing trace with hash -464326576, now seen corresponding path program 24 times [2018-01-23 14:44:16,788 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:16,788 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:16,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:16,788 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:16,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:16,798 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:17,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:17,100 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:17,106 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:17,114 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,116 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,117 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,118 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,120 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,122 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,124 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,126 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,127 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,128 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,129 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,131 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,132 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,132 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:17,134 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:17,389 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:17,389 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2018-01-23 14:44:17,389 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-01-23 14:44:17,389 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-01-23 14:44:17,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=1759, Unknown=0, NotChecked=0, Total=2862 [2018-01-23 14:44:17,390 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 54 states. [2018-01-23 14:44:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:17,452 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-01-23 14:44:17,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:44:17,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 41 [2018-01-23 14:44:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:17,452 INFO L225 Difference]: With dead ends: 52 [2018-01-23 14:44:17,452 INFO L226 Difference]: Without dead ends: 43 [2018-01-23 14:44:17,453 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1132, Invalid=1838, Unknown=0, NotChecked=0, Total=2970 [2018-01-23 14:44:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-23 14:44:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-23 14:44:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-23 14:44:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-01-23 14:44:17,455 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-01-23 14:44:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:17,456 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-01-23 14:44:17,456 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-01-23 14:44:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-01-23 14:44:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-23 14:44:17,456 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:17,456 INFO L322 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:17,456 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:17,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1383770187, now seen corresponding path program 25 times [2018-01-23 14:44:17,456 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:17,457 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:17,457 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:17,457 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:17,457 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:17,468 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:17,804 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:17,804 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:17,809 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:17,822 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:18,083 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:18,083 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2018-01-23 14:44:18,083 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-23 14:44:18,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-23 14:44:18,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1894, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:44:18,084 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 56 states. [2018-01-23 14:44:18,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:18,177 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-01-23 14:44:18,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-23 14:44:18,177 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 42 [2018-01-23 14:44:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:18,178 INFO L225 Difference]: With dead ends: 53 [2018-01-23 14:44:18,178 INFO L226 Difference]: Without dead ends: 44 [2018-01-23 14:44:18,179 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1216, Invalid=1976, Unknown=0, NotChecked=0, Total=3192 [2018-01-23 14:44:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-23 14:44:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-23 14:44:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-23 14:44:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-01-23 14:44:18,183 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-01-23 14:44:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:18,183 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-01-23 14:44:18,183 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-23 14:44:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-01-23 14:44:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-23 14:44:18,184 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:18,184 INFO L322 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:18,184 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1454772304, now seen corresponding path program 26 times [2018-01-23 14:44:18,185 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:18,185 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:18,185 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:18,186 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:18,186 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:18,196 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:18,632 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:18,632 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:18,640 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:18,647 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:18,654 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:18,655 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:18,657 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:19,022 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:19,023 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2018-01-23 14:44:19,023 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-23 14:44:19,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-23 14:44:19,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1272, Invalid=2034, Unknown=0, NotChecked=0, Total=3306 [2018-01-23 14:44:19,024 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 58 states. [2018-01-23 14:44:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:19,079 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-01-23 14:44:19,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-23 14:44:19,080 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 43 [2018-01-23 14:44:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:19,080 INFO L225 Difference]: With dead ends: 54 [2018-01-23 14:44:19,080 INFO L226 Difference]: Without dead ends: 45 [2018-01-23 14:44:19,081 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1303, Invalid=2119, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:44:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-23 14:44:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-23 14:44:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-23 14:44:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-01-23 14:44:19,083 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-01-23 14:44:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:19,084 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-01-23 14:44:19,084 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-23 14:44:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-01-23 14:44:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-23 14:44:19,084 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:19,084 INFO L322 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:19,084 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash 744723691, now seen corresponding path program 27 times [2018-01-23 14:44:19,084 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:19,085 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:19,085 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:19,085 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:19,085 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:19,096 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:19,474 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:19,474 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:19,479 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:19,485 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,487 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,488 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,489 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,490 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,491 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,492 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,493 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,494 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,495 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,496 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,497 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,498 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,499 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,500 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,501 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:19,502 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:19,797 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:19,797 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2018-01-23 14:44:19,797 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-01-23 14:44:19,798 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-01-23 14:44:19,798 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=2179, Unknown=0, NotChecked=0, Total=3540 [2018-01-23 14:44:19,798 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 60 states. [2018-01-23 14:44:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:19,841 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-01-23 14:44:19,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-23 14:44:19,842 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 44 [2018-01-23 14:44:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:19,842 INFO L225 Difference]: With dead ends: 55 [2018-01-23 14:44:19,842 INFO L226 Difference]: Without dead ends: 46 [2018-01-23 14:44:19,843 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1393, Invalid=2267, Unknown=0, NotChecked=0, Total=3660 [2018-01-23 14:44:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-23 14:44:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-23 14:44:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-23 14:44:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-01-23 14:44:19,846 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-01-23 14:44:19,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:19,846 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-01-23 14:44:19,846 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-01-23 14:44:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-01-23 14:44:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-23 14:44:19,847 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:19,847 INFO L322 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:19,847 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash 209622800, now seen corresponding path program 28 times [2018-01-23 14:44:19,847 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:19,847 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:19,848 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:19,848 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:19,848 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:19,856 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:20,239 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:20,239 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:20,245 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:20,259 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:20,261 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:20,570 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:20,570 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2018-01-23 14:44:20,570 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-01-23 14:44:20,571 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-01-23 14:44:20,571 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1453, Invalid=2329, Unknown=0, NotChecked=0, Total=3782 [2018-01-23 14:44:20,571 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 62 states. [2018-01-23 14:44:20,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:20,639 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-01-23 14:44:20,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-23 14:44:20,639 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 45 [2018-01-23 14:44:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:20,639 INFO L225 Difference]: With dead ends: 56 [2018-01-23 14:44:20,639 INFO L226 Difference]: Without dead ends: 47 [2018-01-23 14:44:20,640 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1486, Invalid=2420, Unknown=0, NotChecked=0, Total=3906 [2018-01-23 14:44:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-23 14:44:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-23 14:44:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-23 14:44:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-01-23 14:44:20,643 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-01-23 14:44:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:20,643 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-01-23 14:44:20,643 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-01-23 14:44:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-01-23 14:44:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-23 14:44:20,644 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:20,644 INFO L322 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:20,644 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:20,644 INFO L82 PathProgramCache]: Analyzing trace with hash 801364363, now seen corresponding path program 29 times [2018-01-23 14:44:20,644 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:20,644 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:20,644 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:20,645 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:20,645 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:20,652 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:21,033 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:21,033 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:21,038 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:21,042 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,043 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,044 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,045 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,046 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,052 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,053 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,053 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,054 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,055 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,056 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,057 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,058 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,059 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,060 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,063 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,064 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:21,066 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:21,389 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:21,389 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-01-23 14:44:21,390 INFO L409 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-01-23 14:44:21,390 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-01-23 14:44:21,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=2484, Unknown=0, NotChecked=0, Total=4032 [2018-01-23 14:44:21,390 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 64 states. [2018-01-23 14:44:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:21,471 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-01-23 14:44:21,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-23 14:44:21,471 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 46 [2018-01-23 14:44:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:21,472 INFO L225 Difference]: With dead ends: 57 [2018-01-23 14:44:21,472 INFO L226 Difference]: Without dead ends: 48 [2018-01-23 14:44:21,472 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1582, Invalid=2578, Unknown=0, NotChecked=0, Total=4160 [2018-01-23 14:44:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-23 14:44:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-23 14:44:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-23 14:44:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-01-23 14:44:21,475 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-01-23 14:44:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:21,476 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-01-23 14:44:21,476 INFO L433 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-01-23 14:44:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-01-23 14:44:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-23 14:44:21,477 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:21,477 INFO L322 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:21,477 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1965483632, now seen corresponding path program 30 times [2018-01-23 14:44:21,477 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:21,477 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:21,478 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:21,478 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:21,478 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:21,491 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:21,889 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:21,889 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:21,893 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:21,901 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,902 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,903 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,904 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,905 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,906 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,907 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,908 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,909 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,910 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,911 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,912 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,913 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,915 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,916 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,917 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,917 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:21,919 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:22,283 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:22,284 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2018-01-23 14:44:22,284 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-01-23 14:44:22,284 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-01-23 14:44:22,284 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1646, Invalid=2644, Unknown=0, NotChecked=0, Total=4290 [2018-01-23 14:44:22,285 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 66 states. [2018-01-23 14:44:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:22,355 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-01-23 14:44:22,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-23 14:44:22,356 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 47 [2018-01-23 14:44:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:22,356 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:44:22,356 INFO L226 Difference]: Without dead ends: 49 [2018-01-23 14:44:22,357 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1681, Invalid=2741, Unknown=0, NotChecked=0, Total=4422 [2018-01-23 14:44:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-23 14:44:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-23 14:44:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-23 14:44:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-01-23 14:44:22,359 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-01-23 14:44:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:22,359 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-01-23 14:44:22,359 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-01-23 14:44:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-01-23 14:44:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-23 14:44:22,360 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:22,360 INFO L322 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:22,360 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash -601524693, now seen corresponding path program 31 times [2018-01-23 14:44:22,360 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:22,360 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:22,361 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:22,361 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:22,361 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:22,369 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:22,766 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:22,766 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:22,772 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:22,787 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:23,154 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:23,154 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2018-01-23 14:44:23,155 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-01-23 14:44:23,155 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-01-23 14:44:23,155 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1747, Invalid=2809, Unknown=0, NotChecked=0, Total=4556 [2018-01-23 14:44:23,155 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 68 states. [2018-01-23 14:44:23,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:23,236 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-01-23 14:44:23,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-23 14:44:23,237 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 48 [2018-01-23 14:44:23,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:23,237 INFO L225 Difference]: With dead ends: 59 [2018-01-23 14:44:23,238 INFO L226 Difference]: Without dead ends: 50 [2018-01-23 14:44:23,238 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1783, Invalid=2909, Unknown=0, NotChecked=0, Total=4692 [2018-01-23 14:44:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-23 14:44:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-23 14:44:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-23 14:44:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-01-23 14:44:23,240 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-01-23 14:44:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:23,241 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-01-23 14:44:23,241 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-01-23 14:44:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-01-23 14:44:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-23 14:44:23,241 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:23,242 INFO L322 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:23,242 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1425595856, now seen corresponding path program 32 times [2018-01-23 14:44:23,242 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:23,242 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:23,242 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:23,243 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:23,243 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:23,251 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:23,695 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:23,695 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:23,700 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:23,707 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:23,713 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:23,715 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:23,716 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:24,099 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:24,099 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2018-01-23 14:44:24,099 INFO L409 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-01-23 14:44:24,100 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-01-23 14:44:24,100 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1851, Invalid=2979, Unknown=0, NotChecked=0, Total=4830 [2018-01-23 14:44:24,100 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 70 states. [2018-01-23 14:44:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:24,195 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-01-23 14:44:24,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-23 14:44:24,195 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 49 [2018-01-23 14:44:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:24,196 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:44:24,196 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:44:24,196 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1888, Invalid=3082, Unknown=0, NotChecked=0, Total=4970 [2018-01-23 14:44:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:44:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-23 14:44:24,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-23 14:44:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-01-23 14:44:24,198 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-01-23 14:44:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:24,198 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-01-23 14:44:24,199 INFO L433 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-01-23 14:44:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-01-23 14:44:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-23 14:44:24,199 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:24,199 INFO L322 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:24,199 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:24,200 INFO L82 PathProgramCache]: Analyzing trace with hash -158176565, now seen corresponding path program 33 times [2018-01-23 14:44:24,200 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:24,200 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:24,200 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:24,201 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:24,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:24,214 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:24,647 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:24,647 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:24,651 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:24,659 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,660 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,661 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,662 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,663 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,664 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,665 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,666 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,667 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,668 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,669 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,671 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,672 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,673 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,674 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,675 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,676 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,677 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,678 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:24,680 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:25,082 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:25,082 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2018-01-23 14:44:25,082 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-01-23 14:44:25,082 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-01-23 14:44:25,083 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=3154, Unknown=0, NotChecked=0, Total=5112 [2018-01-23 14:44:25,083 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 72 states. [2018-01-23 14:44:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:25,139 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-01-23 14:44:25,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-23 14:44:25,140 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 50 [2018-01-23 14:44:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:25,140 INFO L225 Difference]: With dead ends: 61 [2018-01-23 14:44:25,140 INFO L226 Difference]: Without dead ends: 52 [2018-01-23 14:44:25,140 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1996, Invalid=3260, Unknown=0, NotChecked=0, Total=5256 [2018-01-23 14:44:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-23 14:44:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-23 14:44:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-23 14:44:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-01-23 14:44:25,143 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-01-23 14:44:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:25,144 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-01-23 14:44:25,144 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-01-23 14:44:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-01-23 14:44:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-23 14:44:25,144 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:25,145 INFO L322 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:25,145 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:25,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2010481360, now seen corresponding path program 34 times [2018-01-23 14:44:25,145 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:25,145 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:25,146 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:25,146 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:25,146 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:25,155 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:25,669 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:25,669 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:25,674 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:25,689 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:25,691 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:26,111 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:26,112 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2018-01-23 14:44:26,112 INFO L409 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-01-23 14:44:26,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-01-23 14:44:26,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2068, Invalid=3334, Unknown=0, NotChecked=0, Total=5402 [2018-01-23 14:44:26,113 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 74 states. [2018-01-23 14:44:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:26,204 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-01-23 14:44:26,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-23 14:44:26,205 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 51 [2018-01-23 14:44:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:26,205 INFO L225 Difference]: With dead ends: 62 [2018-01-23 14:44:26,205 INFO L226 Difference]: Without dead ends: 53 [2018-01-23 14:44:26,206 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2107, Invalid=3443, Unknown=0, NotChecked=0, Total=5550 [2018-01-23 14:44:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-23 14:44:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-23 14:44:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-23 14:44:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-01-23 14:44:26,208 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-01-23 14:44:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:26,208 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-01-23 14:44:26,208 INFO L433 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-01-23 14:44:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-01-23 14:44:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-23 14:44:26,208 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:26,209 INFO L322 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:26,209 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash 697612139, now seen corresponding path program 35 times [2018-01-23 14:44:26,209 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:26,209 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:26,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:26,210 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:26,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:26,220 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:26,790 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:26,790 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:26,797 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:26,802 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,803 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,804 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,805 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,806 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,807 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,808 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,809 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,810 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,811 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,812 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,814 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,815 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,816 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,817 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,819 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,820 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,822 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,827 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,829 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:26,831 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:27,572 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:27,572 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2018-01-23 14:44:27,573 INFO L409 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-01-23 14:44:27,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-01-23 14:44:27,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=3519, Unknown=0, NotChecked=0, Total=5700 [2018-01-23 14:44:27,573 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 76 states. [2018-01-23 14:44:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:27,684 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-01-23 14:44:27,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-23 14:44:27,684 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 52 [2018-01-23 14:44:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:27,685 INFO L225 Difference]: With dead ends: 63 [2018-01-23 14:44:27,685 INFO L226 Difference]: Without dead ends: 54 [2018-01-23 14:44:27,685 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2221, Invalid=3631, Unknown=0, NotChecked=0, Total=5852 [2018-01-23 14:44:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-23 14:44:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-23 14:44:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-23 14:44:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-01-23 14:44:27,689 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-01-23 14:44:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:27,689 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-01-23 14:44:27,689 INFO L433 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-01-23 14:44:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-01-23 14:44:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-23 14:44:27,690 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:27,690 INFO L322 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:27,690 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:27,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1250835312, now seen corresponding path program 36 times [2018-01-23 14:44:27,691 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:27,691 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:27,691 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:27,691 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:27,692 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:27,706 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:28,313 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:28,313 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:28,317 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:28,325 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,326 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,327 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,328 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,329 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,330 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,332 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,333 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,334 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,335 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,336 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,337 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,338 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,339 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,340 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,341 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,343 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,344 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,345 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,346 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:28,347 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:28,804 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:28,804 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2018-01-23 14:44:28,805 INFO L409 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-01-23 14:44:28,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-01-23 14:44:28,805 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2297, Invalid=3709, Unknown=0, NotChecked=0, Total=6006 [2018-01-23 14:44:28,805 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 78 states. [2018-01-23 14:44:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:28,865 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-01-23 14:44:28,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-23 14:44:28,865 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 53 [2018-01-23 14:44:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:28,866 INFO L225 Difference]: With dead ends: 64 [2018-01-23 14:44:28,866 INFO L226 Difference]: Without dead ends: 55 [2018-01-23 14:44:28,867 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2338, Invalid=3824, Unknown=0, NotChecked=0, Total=6162 [2018-01-23 14:44:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-23 14:44:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-23 14:44:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-23 14:44:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-01-23 14:44:28,869 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-01-23 14:44:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:28,869 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-01-23 14:44:28,869 INFO L433 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-01-23 14:44:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-01-23 14:44:28,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-23 14:44:28,870 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:28,870 INFO L322 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:28,870 INFO L371 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:28,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1523164149, now seen corresponding path program 37 times [2018-01-23 14:44:28,870 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:28,870 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:28,870 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:28,871 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:28,871 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:28,884 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:29,441 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:29,441 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:29,446 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:29,462 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:29,946 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:29,947 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2018-01-23 14:44:29,947 INFO L409 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-01-23 14:44:29,947 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-01-23 14:44:29,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2416, Invalid=3904, Unknown=0, NotChecked=0, Total=6320 [2018-01-23 14:44:29,948 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 80 states. [2018-01-23 14:44:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:30,026 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-01-23 14:44:30,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-23 14:44:30,026 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 54 [2018-01-23 14:44:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:30,027 INFO L225 Difference]: With dead ends: 65 [2018-01-23 14:44:30,027 INFO L226 Difference]: Without dead ends: 56 [2018-01-23 14:44:30,027 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2458, Invalid=4022, Unknown=0, NotChecked=0, Total=6480 [2018-01-23 14:44:30,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-23 14:44:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-23 14:44:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-23 14:44:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-01-23 14:44:30,031 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-01-23 14:44:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:30,031 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-01-23 14:44:30,031 INFO L433 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-01-23 14:44:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-01-23 14:44:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-23 14:44:30,032 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:30,032 INFO L322 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:30,032 INFO L371 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1375423504, now seen corresponding path program 38 times [2018-01-23 14:44:30,032 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:30,033 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:30,033 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:30,033 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:30,034 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:30,048 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:30,640 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:30,640 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:30,646 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:30,654 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:30,664 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:30,666 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:30,669 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:31,217 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:31,217 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2018-01-23 14:44:31,217 INFO L409 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-01-23 14:44:31,218 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-01-23 14:44:31,218 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2538, Invalid=4104, Unknown=0, NotChecked=0, Total=6642 [2018-01-23 14:44:31,219 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 82 states. [2018-01-23 14:44:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:31,292 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-01-23 14:44:31,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-23 14:44:31,292 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 55 [2018-01-23 14:44:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:31,292 INFO L225 Difference]: With dead ends: 66 [2018-01-23 14:44:31,292 INFO L226 Difference]: Without dead ends: 57 [2018-01-23 14:44:31,293 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2581, Invalid=4225, Unknown=0, NotChecked=0, Total=6806 [2018-01-23 14:44:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-23 14:44:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-23 14:44:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-23 14:44:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-01-23 14:44:31,295 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-01-23 14:44:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:31,295 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-01-23 14:44:31,295 INFO L433 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-01-23 14:44:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-01-23 14:44:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-23 14:44:31,296 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:31,296 INFO L322 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:31,296 INFO L371 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:31,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1090430805, now seen corresponding path program 39 times [2018-01-23 14:44:31,296 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:31,296 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:31,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:31,297 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:31,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:31,306 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:31,895 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:31,895 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:31,900 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:31,907 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,909 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,910 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,911 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,912 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,913 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,914 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,915 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,916 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,917 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,918 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,919 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,920 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,921 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,922 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,923 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,925 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,926 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,927 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,928 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,930 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:31,930 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:31,932 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:32,453 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:32,453 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2018-01-23 14:44:32,453 INFO L409 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-01-23 14:44:32,454 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-01-23 14:44:32,454 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=4309, Unknown=0, NotChecked=0, Total=6972 [2018-01-23 14:44:32,454 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 84 states. [2018-01-23 14:44:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:32,534 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-01-23 14:44:32,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-23 14:44:32,534 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 56 [2018-01-23 14:44:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:32,535 INFO L225 Difference]: With dead ends: 67 [2018-01-23 14:44:32,535 INFO L226 Difference]: Without dead ends: 58 [2018-01-23 14:44:32,535 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2707, Invalid=4433, Unknown=0, NotChecked=0, Total=7140 [2018-01-23 14:44:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-23 14:44:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-23 14:44:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-23 14:44:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-01-23 14:44:32,543 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-01-23 14:44:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:32,544 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-01-23 14:44:32,544 INFO L433 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-01-23 14:44:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-01-23 14:44:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-23 14:44:32,544 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:32,544 INFO L322 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:32,544 INFO L371 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:32,544 INFO L82 PathProgramCache]: Analyzing trace with hash -845591728, now seen corresponding path program 40 times [2018-01-23 14:44:32,544 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:32,544 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:32,545 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,545 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:32,545 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:32,587 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:44:32,593 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:44:32,599 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2018-01-23 14:44:32,600 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:44:32,600 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:44:32,608 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:44:32,608 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:44:32,608 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:44:32,608 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:44:32,608 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:44:32,609 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:44:32,609 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:44:32,609 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:44:32,609 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:44:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-23 14:44:32,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-23 14:44:32,610 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:32,610 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:32,610 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-23 14:44:32,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1259858052, now seen corresponding path program 1 times [2018-01-23 14:44:32,611 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:32,611 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:32,611 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,612 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:32,612 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:32,615 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:32,652 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:44:32,652 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:44:32,652 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:44:32,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:44:32,653 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:44:32,653 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2018-01-23 14:44:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:32,660 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:44:32,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:44:32,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-23 14:44:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:32,660 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:44:32,661 INFO L226 Difference]: Without dead ends: 17 [2018-01-23 14:44:32,661 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:44:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-01-23 14:44:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-01-23 14:44:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-01-23 14:44:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-01-23 14:44:32,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-01-23 14:44:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:32,663 INFO L432 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-01-23 14:44:32,663 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:44:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-01-23 14:44:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-23 14:44:32,663 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:32,663 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:32,664 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-23 14:44:32,664 INFO L82 PathProgramCache]: Analyzing trace with hash -956542153, now seen corresponding path program 1 times [2018-01-23 14:44:32,664 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:32,664 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:32,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,665 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:32,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:32,669 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:32,705 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:32,705 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:32,710 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:32,717 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:32,747 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:32,747 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-01-23 14:44:32,747 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:44:32,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:44:32,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:44:32,748 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2018-01-23 14:44:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:32,763 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-01-23 14:44:32,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:44:32,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-01-23 14:44:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:32,763 INFO L225 Difference]: With dead ends: 25 [2018-01-23 14:44:32,763 INFO L226 Difference]: Without dead ends: 18 [2018-01-23 14:44:32,764 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:44:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-23 14:44:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-23 14:44:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-23 14:44:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-23 14:44:32,765 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-01-23 14:44:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:32,765 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-23 14:44:32,765 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:44:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-23 14:44:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:44:32,765 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:32,766 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:32,766 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-23 14:44:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash -143683876, now seen corresponding path program 2 times [2018-01-23 14:44:32,766 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:32,766 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:32,766 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,766 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:32,767 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:32,769 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:32,789 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:32,789 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:32,795 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:32,801 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:32,802 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:32,804 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:32,850 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:44:32,858 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-01-23 14:44:32,859 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-23 14:44:32,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-23 14:44:32,861 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-01-23 14:44:32,931 WARN L1029 $PredicateComparison]: unable to prove that (exists ((|main_~#cstats~2.base| Int)) (and (= (select |c_old(#valid)| |main_~#cstats~2.base|) 0) (= |c_#valid| (store |c_old(#valid)| |main_~#cstats~2.base| 0)))) is different from true [2018-01-23 14:44:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-23 14:44:32,968 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-23 14:44:32,968 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2018-01-23 14:44:32,969 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:44:32,969 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:44:32,969 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2018-01-23 14:44:32,969 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2018-01-23 14:44:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:33,181 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-01-23 14:44:33,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:44:33,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-01-23 14:44:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:33,182 INFO L225 Difference]: With dead ends: 25 [2018-01-23 14:44:33,182 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:44:33,182 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=149, Unknown=1, NotChecked=26, Total=240 [2018-01-23 14:44:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:44:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:44:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:44:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:44:33,183 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-01-23 14:44:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:33,183 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:44:33,183 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:44:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:44:33,184 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:44:33,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:44:33 BoogieIcfgContainer [2018-01-23 14:44:33,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:44:33,187 INFO L168 Benchmark]: Toolchain (without parser) took 28191.11 ms. Allocated memory was 307.8 MB in the beginning and 715.7 MB in the end (delta: 407.9 MB). Free memory was 267.1 MB in the beginning and 573.1 MB in the end (delta: -306.0 MB). Peak memory consumption was 101.9 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:33,189 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 307.8 MB. Free memory is still 272.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:44:33,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.60 ms. Allocated memory is still 307.8 MB. Free memory was 266.1 MB in the beginning and 259.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:33,189 INFO L168 Benchmark]: Boogie Preprocessor took 34.56 ms. Allocated memory is still 307.8 MB. Free memory was 259.1 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:33,189 INFO L168 Benchmark]: RCFGBuilder took 174.52 ms. Allocated memory is still 307.8 MB. Free memory was 257.1 MB in the beginning and 245.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:33,190 INFO L168 Benchmark]: TraceAbstraction took 27795.97 ms. Allocated memory was 307.8 MB in the beginning and 715.7 MB in the end (delta: 407.9 MB). Free memory was 245.4 MB in the beginning and 573.1 MB in the end (delta: -327.7 MB). Peak memory consumption was 80.2 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:33,191 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 307.8 MB. Free memory is still 272.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 177.60 ms. Allocated memory is still 307.8 MB. Free memory was 266.1 MB in the beginning and 259.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 34.56 ms. Allocated memory is still 307.8 MB. Free memory was 259.1 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 174.52 ms. Allocated memory is still 307.8 MB. Free memory was 257.1 MB in the beginning and 245.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 5.3 GB. * TraceAbstraction took 27795.97 ms. Allocated memory was 307.8 MB in the beginning and 715.7 MB in the end (delta: 407.9 MB). Free memory was 245.4 MB in the beginning and 573.1 MB in the end (delta: -327.7 MB). Peak memory consumption was 80.2 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) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - 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, 21 locations, 3 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=21occurred 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 - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L21] FCALL struct compstat cstats ; VAL [cstats={42:0}] [L22] FCALL memset((void *)(& cstats), 10, 40UL) VAL [cstats={42:0}, memset((void *)(& cstats), 10, 40UL)={42:0}] [L23] return 0; VAL [\result=0, cstats={42:0}] [L23] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 21 locations, 3 error locations. UNSAFE Result, 26.9s OverallTime, 41 OverallIterations, 40 TraceHistogramMax, 2.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 643 SDtfs, 128 SDslu, 13725 SDs, 0 SdLazy, 3244 SolverSat, 143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2384 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 1758 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46345 ImplicationChecksByTransitivity, 20.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 40 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 21.6s InterpolantComputationTime, 2960 NumberOfCodeBlocks, 2960 NumberOfCodeBlocksAsserted, 296 NumberOfCheckSat, 2824 ConstructedInterpolants, 0 QuantifiedInterpolants, 428188 SizeOfPredicates, 39 NumberOfNonLiveVariables, 4719 ConjunctsInSsa, 897 ConjunctsInUnsatCore, 79 InterpolantComputations, 1 PerfectInterpolantSequences, 0/21320 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 20]: 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: mainErr0EnsuresViolation CFG has 4 procedures, 21 locations, 3 error locations. SAFE Result, 0.5s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 13 SDslu, 91 SDs, 0 SdLazy, 64 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 81 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 76 ConstructedInterpolants, 8 QuantifiedInterpolants, 3391 SizeOfPredicates, 4 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: 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/memsetNonZero2_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-44-33-200.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero2_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-44-33-200.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero2_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-44-33-200.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero2_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-44-33-200.csv Received shutdown request...