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/memset2_false-valid-deref-write.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 22:13:17,532 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 22:13:17,534 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 22:13:17,553 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 22:13:17,553 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 22:13:17,555 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 22:13:17,556 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 22:13:17,558 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 22:13:17,560 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 22:13:17,561 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 22:13:17,562 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 22:13:17,563 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 22:13:17,564 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 22:13:17,566 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 22:13:17,567 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 22:13:17,570 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 22:13:17,572 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 22:13:17,574 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 22:13:17,576 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 22:13:17,577 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 22:13:17,580 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-20 22:13:17,580 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-20 22:13:17,580 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-20 22:13:17,582 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-20 22:13:17,583 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-20 22:13:17,584 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-20 22:13:17,585 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-20 22:13:17,585 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-20 22:13:17,586 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-20 22:13:17,586 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 22:13:17,588 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 22:13:17,588 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-20 22:13:17,599 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 22:13:17,600 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 22:13:17,600 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 22:13:17,601 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 22:13:17,601 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 22:13:17,601 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 22:13:17,601 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 22:13:17,602 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 22:13:17,602 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 22:13:17,603 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 22:13:17,603 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 22:13:17,603 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 22:13:17,603 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 22:13:17,603 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 22:13:17,604 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 22:13:17,604 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 22:13:17,604 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 22:13:17,604 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 22:13:17,604 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 22:13:17,605 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 22:13:17,605 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 22:13:17,605 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 22:13:17,605 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 22:13:17,605 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 22:13:17,606 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 22:13:17,606 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:13:17,606 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 22:13:17,606 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 22:13:17,607 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 22:13:17,607 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 22:13:17,607 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 22:13:17,607 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 22:13:17,607 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 22:13:17,607 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 22:13:17,608 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 22:13:17,609 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 22:13:17,609 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 22:13:17,649 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 22:13:17,663 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 22:13:17,668 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 22:13:17,669 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 22:13:17,670 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 22:13:17,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memset2_false-valid-deref-write.c [2018-01-20 22:13:17,806 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 22:13:17,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 22:13:17,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 22:13:17,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 22:13:17,817 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 22:13:17,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:13:17" (1/1) ... [2018-01-20 22:13:17,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29127b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17, skipping insertion in model container [2018-01-20 22:13:17,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:13:17" (1/1) ... [2018-01-20 22:13:17,836 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:13:17,854 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:13:17,964 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:13:17,978 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:13:17,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17 WrapperNode [2018-01-20 22:13:17,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 22:13:17,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 22:13:17,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 22:13:17,984 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 22:13:17,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17" (1/1) ... [2018-01-20 22:13:17,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17" (1/1) ... [2018-01-20 22:13:18,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17" (1/1) ... [2018-01-20 22:13:18,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17" (1/1) ... [2018-01-20 22:13:18,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17" (1/1) ... [2018-01-20 22:13:18,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17" (1/1) ... [2018-01-20 22:13:18,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17" (1/1) ... [2018-01-20 22:13:18,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 22:13:18,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 22:13:18,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 22:13:18,013 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 22:13:18,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:13:18,059 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 22:13:18,060 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 22:13:18,060 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 22:13:18,060 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 22:13:18,060 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 22:13:18,060 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 22:13:18,061 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-20 22:13:18,061 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-20 22:13:18,061 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-20 22:13:18,061 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 22:13:18,061 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 22:13:18,061 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 22:13:18,197 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 22:13:18,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:13:18 BoogieIcfgContainer [2018-01-20 22:13:18,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 22:13:18,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 22:13:18,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 22:13:18,200 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 22:13:18,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 10:13:17" (1/3) ... [2018-01-20 22:13:18,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff358ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:13:18, skipping insertion in model container [2018-01-20 22:13:18,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:17" (2/3) ... [2018-01-20 22:13:18,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff358ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:13:18, skipping insertion in model container [2018-01-20 22:13:18,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:13:18" (3/3) ... [2018-01-20 22:13:18,204 INFO L105 eAbstractionObserver]: Analyzing ICFG memset2_false-valid-deref-write.c [2018-01-20 22:13:18,210 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 22:13:18,216 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-20 22:13:18,259 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:13:18,259 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:13:18,259 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:13:18,260 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:13:18,260 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:13:18,260 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:13:18,260 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:13:18,260 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 22:13:18,261 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:13:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-20 22:13:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 22:13:18,281 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:18,282 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 22:13:18,282 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 22:13:18,288 INFO L82 PathProgramCache]: Analyzing trace with hash 50935, now seen corresponding path program 1 times [2018-01-20 22:13:18,290 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:18,290 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:18,331 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:18,331 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:18,332 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:13:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:13:18,388 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 22:13:18,393 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:13:18,400 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:13:18,400 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:13:18,400 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:13:18,400 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:13:18,400 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:13:18,401 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:13:18,401 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:13:18,401 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 22:13:18,401 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:13:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-20 22:13:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 22:13:18,403 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:18,403 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:18,403 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:18,403 INFO L82 PathProgramCache]: Analyzing trace with hash 457189328, now seen corresponding path program 1 times [2018-01-20 22:13:18,403 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:18,403 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:18,404 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:18,404 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:18,404 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:18,432 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:18,514 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:13:18,514 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-20 22:13:18,515 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 22:13:18,530 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 22:13:18,530 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 22:13:18,533 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2018-01-20 22:13:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:18,594 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-20 22:13:18,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 22:13:18,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-20 22:13:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:18,608 INFO L225 Difference]: With dead ends: 33 [2018-01-20 22:13:18,609 INFO L226 Difference]: Without dead ends: 19 [2018-01-20 22:13:18,678 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 [2018-01-20 22:13:18,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-20 22:13:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-20 22:13:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-20 22:13:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-20 22:13:18,710 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-01-20 22:13:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:18,710 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-20 22:13:18,710 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 22:13:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-20 22:13:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-20 22:13:18,711 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:18,711 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:18,711 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:18,711 INFO L82 PathProgramCache]: Analyzing trace with hash -114007861, now seen corresponding path program 1 times [2018-01-20 22:13:18,711 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:18,711 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:18,712 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:18,713 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:18,713 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:18,731 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:18,784 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:18,784 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:18,801 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:18,830 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:18,886 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:18,887 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-20 22:13:18,887 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 22:13:18,888 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 22:13:18,888 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-20 22:13:18,888 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-01-20 22:13:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:18,914 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-01-20 22:13:18,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 22:13:18,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-20 22:13:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:18,916 INFO L225 Difference]: With dead ends: 29 [2018-01-20 22:13:18,916 INFO L226 Difference]: Without dead ends: 20 [2018-01-20 22:13:18,917 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:13:18,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-01-20 22:13:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-01-20 22:13:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-01-20 22:13:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-01-20 22:13:18,922 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-01-20 22:13:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:18,923 INFO L432 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-01-20 22:13:18,923 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 22:13:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-01-20 22:13:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 22:13:18,924 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:18,924 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:18,924 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:18,924 INFO L82 PathProgramCache]: Analyzing trace with hash -641251536, now seen corresponding path program 2 times [2018-01-20 22:13:18,924 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:18,925 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:18,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:18,926 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:18,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:18,941 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,013 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:19,013 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:19,025 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:19,040 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:19,046 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:19,051 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:19,054 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,116 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:19,116 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-01-20 22:13:19,117 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-20 22:13:19,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-20 22:13:19,117 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:13:19,117 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-01-20 22:13:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:19,136 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-01-20 22:13:19,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-20 22:13:19,136 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-01-20 22:13:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:19,137 INFO L225 Difference]: With dead ends: 30 [2018-01-20 22:13:19,137 INFO L226 Difference]: Without dead ends: 21 [2018-01-20 22:13:19,137 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-20 22:13:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-01-20 22:13:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-01-20 22:13:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-01-20 22:13:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-01-20 22:13:19,140 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-01-20 22:13:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:19,140 INFO L432 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-01-20 22:13:19,140 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-20 22:13:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-01-20 22:13:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-20 22:13:19,141 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:19,141 INFO L322 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:19,141 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:19,141 INFO L82 PathProgramCache]: Analyzing trace with hash 194063723, now seen corresponding path program 3 times [2018-01-20 22:13:19,141 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:19,141 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:19,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,142 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:19,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:19,152 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,243 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:19,243 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:19,252 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:19,265 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:19,267 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:19,269 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:19,269 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:19,271 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,318 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:19,318 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-01-20 22:13:19,318 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-20 22:13:19,319 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-20 22:13:19,319 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-01-20 22:13:19,319 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2018-01-20 22:13:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:19,351 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-01-20 22:13:19,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 22:13:19,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-01-20 22:13:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:19,352 INFO L225 Difference]: With dead ends: 31 [2018-01-20 22:13:19,352 INFO L226 Difference]: Without dead ends: 22 [2018-01-20 22:13:19,353 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:13:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-01-20 22:13:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-01-20 22:13:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-01-20 22:13:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-01-20 22:13:19,357 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-01-20 22:13:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:19,357 INFO L432 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-01-20 22:13:19,358 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-20 22:13:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-01-20 22:13:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-20 22:13:19,358 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:19,359 INFO L322 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:19,359 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash 319032976, now seen corresponding path program 4 times [2018-01-20 22:13:19,359 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:19,359 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:19,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,361 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:19,361 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:19,374 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,461 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:19,462 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:19,468 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:19,491 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:19,494 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,539 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:19,539 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-01-20 22:13:19,540 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 22:13:19,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 22:13:19,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:13:19,540 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2018-01-20 22:13:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:19,584 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-01-20 22:13:19,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 22:13:19,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-01-20 22:13:19,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:19,585 INFO L225 Difference]: With dead ends: 32 [2018-01-20 22:13:19,585 INFO L226 Difference]: Without dead ends: 23 [2018-01-20 22:13:19,586 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:13:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-20 22:13:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-20 22:13:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-20 22:13:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-01-20 22:13:19,590 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-01-20 22:13:19,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:19,591 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-01-20 22:13:19,591 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 22:13:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-01-20 22:13:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-20 22:13:19,592 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:19,592 INFO L322 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:19,592 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash -101887477, now seen corresponding path program 5 times [2018-01-20 22:13:19,593 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:19,593 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:19,594 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,594 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:19,594 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:19,609 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,690 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:19,690 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:19,695 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:19,700 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:19,702 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:19,703 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:19,708 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:19,709 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:19,711 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,747 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:19,748 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-20 22:13:19,748 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:13:19,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:13:19,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:13:19,748 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 10 states. [2018-01-20 22:13:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:19,771 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-20 22:13:19,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-20 22:13:19,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-01-20 22:13:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:19,772 INFO L225 Difference]: With dead ends: 33 [2018-01-20 22:13:19,772 INFO L226 Difference]: Without dead ends: 24 [2018-01-20 22:13:19,772 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-01-20 22:13:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-20 22:13:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-20 22:13:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-20 22:13:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-01-20 22:13:19,776 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-01-20 22:13:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:19,776 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-01-20 22:13:19,776 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:13:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-01-20 22:13:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-20 22:13:19,776 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:19,777 INFO L322 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:19,777 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash -265519632, now seen corresponding path program 6 times [2018-01-20 22:13:19,777 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:19,777 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:19,778 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,778 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:19,778 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:19,790 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,896 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:19,896 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:19,908 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:19,920 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:19,923 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:19,924 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:19,926 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:19,927 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:19,929 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:19,973 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:19,974 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-20 22:13:19,974 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-20 22:13:19,974 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-20 22:13:19,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-01-20 22:13:19,975 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2018-01-20 22:13:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:20,032 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-20 22:13:20,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 22:13:20,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-01-20 22:13:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:20,034 INFO L225 Difference]: With dead ends: 34 [2018-01-20 22:13:20,034 INFO L226 Difference]: Without dead ends: 25 [2018-01-20 22:13:20,035 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:13:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-20 22:13:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-20 22:13:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-20 22:13:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-01-20 22:13:20,039 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-01-20 22:13:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:20,039 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-01-20 22:13:20,039 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-20 22:13:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-01-20 22:13:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-20 22:13:20,040 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:20,040 INFO L322 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:20,041 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1043149141, now seen corresponding path program 7 times [2018-01-20 22:13:20,041 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:20,041 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:20,042 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:20,042 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:20,042 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:20,053 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:20,140 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:20,140 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:20,145 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:20,159 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:20,191 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:20,191 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-20 22:13:20,191 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-20 22:13:20,192 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-20 22:13:20,192 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:13:20,192 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 12 states. [2018-01-20 22:13:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:20,227 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-01-20 22:13:20,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-20 22:13:20,228 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-01-20 22:13:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:20,229 INFO L225 Difference]: With dead ends: 35 [2018-01-20 22:13:20,229 INFO L226 Difference]: Without dead ends: 26 [2018-01-20 22:13:20,230 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-01-20 22:13:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-20 22:13:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-01-20 22:13:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-20 22:13:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-01-20 22:13:20,234 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-01-20 22:13:20,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:20,235 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-01-20 22:13:20,235 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-20 22:13:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-01-20 22:13:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-20 22:13:20,236 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:20,236 INFO L322 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:20,236 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash 620139856, now seen corresponding path program 8 times [2018-01-20 22:13:20,237 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:20,237 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:20,238 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:20,238 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:20,238 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:20,248 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:20,360 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:20,360 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:20,368 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:20,377 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:20,382 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:20,383 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:20,385 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:20,421 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:20,421 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-01-20 22:13:20,421 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-20 22:13:20,421 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-20 22:13:20,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-01-20 22:13:20,422 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 13 states. [2018-01-20 22:13:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:20,462 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-01-20 22:13:20,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-20 22:13:20,462 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-01-20 22:13:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:20,463 INFO L225 Difference]: With dead ends: 36 [2018-01-20 22:13:20,463 INFO L226 Difference]: Without dead ends: 27 [2018-01-20 22:13:20,463 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-01-20 22:13:20,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-20 22:13:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-01-20 22:13:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-20 22:13:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-01-20 22:13:20,467 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-01-20 22:13:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:20,468 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-01-20 22:13:20,468 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-20 22:13:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-01-20 22:13:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-20 22:13:20,468 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:20,469 INFO L322 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:20,469 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 642491211, now seen corresponding path program 9 times [2018-01-20 22:13:20,469 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:20,469 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:20,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:20,470 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:20,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:20,480 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:20,646 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:20,646 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:20,651 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:20,660 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:20,665 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:20,666 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:20,668 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:20,669 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:20,671 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:20,672 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:20,674 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:20,719 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:20,719 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-01-20 22:13:20,719 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-20 22:13:20,720 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-20 22:13:20,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-01-20 22:13:20,720 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-01-20 22:13:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:20,760 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-01-20 22:13:20,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-20 22:13:20,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-01-20 22:13:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:20,760 INFO L225 Difference]: With dead ends: 37 [2018-01-20 22:13:20,761 INFO L226 Difference]: Without dead ends: 28 [2018-01-20 22:13:20,761 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-01-20 22:13:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-01-20 22:13:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-01-20 22:13:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-20 22:13:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-01-20 22:13:20,765 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-01-20 22:13:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:20,765 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-01-20 22:13:20,765 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-20 22:13:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-01-20 22:13:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-20 22:13:20,766 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:20,766 INFO L322 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:20,766 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:20,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1335383216, now seen corresponding path program 10 times [2018-01-20 22:13:20,767 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:20,767 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:20,768 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:20,768 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:20,768 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:20,777 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:21,025 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:21,025 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:21,033 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:21,048 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:21,050 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:21,116 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:21,117 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-01-20 22:13:21,117 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-20 22:13:21,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-20 22:13:21,118 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-01-20 22:13:21,118 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 15 states. [2018-01-20 22:13:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:21,148 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-01-20 22:13:21,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 22:13:21,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2018-01-20 22:13:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:21,150 INFO L225 Difference]: With dead ends: 38 [2018-01-20 22:13:21,150 INFO L226 Difference]: Without dead ends: 29 [2018-01-20 22:13:21,151 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2018-01-20 22:13:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-20 22:13:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-20 22:13:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-20 22:13:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-01-20 22:13:21,155 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-01-20 22:13:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:21,156 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-01-20 22:13:21,156 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-20 22:13:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-01-20 22:13:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-20 22:13:21,157 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:21,157 INFO L322 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:21,157 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1340198891, now seen corresponding path program 11 times [2018-01-20 22:13:21,158 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:21,158 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:21,159 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:21,159 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:21,159 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:21,168 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:21,389 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:21,390 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:21,403 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:21,407 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:21,409 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:21,410 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:21,411 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:21,412 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:21,414 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:21,419 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:21,421 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:21,423 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:21,469 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:21,469 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-01-20 22:13:21,469 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-20 22:13:21,469 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-20 22:13:21,470 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-01-20 22:13:21,470 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 16 states. [2018-01-20 22:13:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:21,525 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-01-20 22:13:21,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-20 22:13:21,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2018-01-20 22:13:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:21,526 INFO L225 Difference]: With dead ends: 39 [2018-01-20 22:13:21,526 INFO L226 Difference]: Without dead ends: 30 [2018-01-20 22:13:21,526 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2018-01-20 22:13:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-20 22:13:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-20 22:13:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-20 22:13:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-01-20 22:13:21,531 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-01-20 22:13:21,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:21,531 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-01-20 22:13:21,531 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-20 22:13:21,531 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-01-20 22:13:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-20 22:13:21,532 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:21,532 INFO L322 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:21,532 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:21,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1489484816, now seen corresponding path program 12 times [2018-01-20 22:13:21,532 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:21,532 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:21,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:21,533 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:21,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:21,543 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:21,631 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:21,632 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:21,637 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:21,644 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:21,646 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:21,647 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:21,648 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:21,649 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:21,651 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:21,652 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:21,653 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:21,655 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:21,703 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:21,703 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-01-20 22:13:21,703 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-20 22:13:21,704 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-20 22:13:21,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-01-20 22:13:21,704 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 17 states. [2018-01-20 22:13:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:21,737 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-01-20 22:13:21,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-20 22:13:21,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-01-20 22:13:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:21,740 INFO L225 Difference]: With dead ends: 40 [2018-01-20 22:13:21,740 INFO L226 Difference]: Without dead ends: 31 [2018-01-20 22:13:21,740 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:13:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-20 22:13:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-20 22:13:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-20 22:13:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-01-20 22:13:21,743 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-01-20 22:13:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:21,743 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-01-20 22:13:21,743 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-20 22:13:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-01-20 22:13:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-20 22:13:21,744 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:21,744 INFO L322 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:21,744 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:21,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1822381195, now seen corresponding path program 13 times [2018-01-20 22:13:21,744 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:21,745 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:21,745 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:21,746 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:21,746 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:21,755 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:21,859 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:21,859 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:21,864 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:21,876 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:21,909 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:21,909 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-20 22:13:21,909 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-20 22:13:21,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-20 22:13:21,909 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:13:21,909 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 18 states. [2018-01-20 22:13:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:21,937 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-01-20 22:13:21,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-20 22:13:21,937 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2018-01-20 22:13:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:21,938 INFO L225 Difference]: With dead ends: 41 [2018-01-20 22:13:21,938 INFO L226 Difference]: Without dead ends: 32 [2018-01-20 22:13:21,938 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:13:21,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-20 22:13:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-20 22:13:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-20 22:13:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-01-20 22:13:21,941 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-01-20 22:13:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:21,942 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-01-20 22:13:21,942 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-20 22:13:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-01-20 22:13:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-20 22:13:21,942 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:21,942 INFO L322 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:21,942 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash -742732944, now seen corresponding path program 14 times [2018-01-20 22:13:21,942 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:21,943 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:21,943 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:21,943 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:21,943 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:21,951 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:22,095 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:22,095 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:22,100 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:22,108 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:22,113 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:22,114 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:22,116 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:22,153 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:22,153 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-01-20 22:13:22,153 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-20 22:13:22,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-20 22:13:22,154 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:13:22,154 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 19 states. [2018-01-20 22:13:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:22,182 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-01-20 22:13:22,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-20 22:13:22,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2018-01-20 22:13:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:22,183 INFO L225 Difference]: With dead ends: 42 [2018-01-20 22:13:22,183 INFO L226 Difference]: Without dead ends: 33 [2018-01-20 22:13:22,184 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2018-01-20 22:13:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-20 22:13:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-20 22:13:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-20 22:13:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-01-20 22:13:22,188 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-01-20 22:13:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:22,189 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-01-20 22:13:22,189 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-20 22:13:22,189 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-01-20 22:13:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-20 22:13:22,190 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:22,190 INFO L322 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:22,190 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1343107371, now seen corresponding path program 15 times [2018-01-20 22:13:22,190 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:22,190 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:22,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:22,191 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:22,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:22,205 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:22,362 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:22,362 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:22,370 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:22,380 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:22,383 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:22,386 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:22,388 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:22,390 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:22,392 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:22,394 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:22,397 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:22,399 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:22,399 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:22,402 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:22,455 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:22,455 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-01-20 22:13:22,455 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-20 22:13:22,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-20 22:13:22,456 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-01-20 22:13:22,456 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 20 states. [2018-01-20 22:13:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:22,500 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-01-20 22:13:22,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-20 22:13:22,501 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2018-01-20 22:13:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:22,502 INFO L225 Difference]: With dead ends: 43 [2018-01-20 22:13:22,502 INFO L226 Difference]: Without dead ends: 34 [2018-01-20 22:13:22,503 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2018-01-20 22:13:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-20 22:13:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-20 22:13:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-20 22:13:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-01-20 22:13:22,507 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-01-20 22:13:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:22,507 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-01-20 22:13:22,508 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-20 22:13:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-01-20 22:13:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-20 22:13:22,508 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:22,508 INFO L322 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:22,509 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:22,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1579647696, now seen corresponding path program 16 times [2018-01-20 22:13:22,509 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:22,509 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:22,510 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:22,510 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:22,510 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:22,519 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:22,722 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:22,722 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:22,729 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:22,742 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:22,743 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:22,778 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:22,778 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-01-20 22:13:22,779 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-20 22:13:22,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-20 22:13:22,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2018-01-20 22:13:22,779 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 21 states. [2018-01-20 22:13:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:22,841 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-01-20 22:13:22,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-20 22:13:22,841 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-01-20 22:13:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:22,841 INFO L225 Difference]: With dead ends: 44 [2018-01-20 22:13:22,842 INFO L226 Difference]: Without dead ends: 35 [2018-01-20 22:13:22,842 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2018-01-20 22:13:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-20 22:13:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-20 22:13:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-20 22:13:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-01-20 22:13:22,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-01-20 22:13:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:22,846 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-01-20 22:13:22,846 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-20 22:13:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-01-20 22:13:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-20 22:13:22,847 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:22,847 INFO L322 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:22,847 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash 322463179, now seen corresponding path program 17 times [2018-01-20 22:13:22,847 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:22,847 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:22,848 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:22,848 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:22,848 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:22,855 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:23,056 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:23,056 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:23,061 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:23,065 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,066 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,067 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,068 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,069 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,071 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,072 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,073 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,074 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,078 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:23,079 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:23,081 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:23,124 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:23,124 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-01-20 22:13:23,124 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-20 22:13:23,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-20 22:13:23,125 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-01-20 22:13:23,125 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 22 states. [2018-01-20 22:13:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:23,153 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-01-20 22:13:23,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-20 22:13:23,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 34 [2018-01-20 22:13:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:23,154 INFO L225 Difference]: With dead ends: 45 [2018-01-20 22:13:23,154 INFO L226 Difference]: Without dead ends: 36 [2018-01-20 22:13:23,154 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2018-01-20 22:13:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-20 22:13:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-20 22:13:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-20 22:13:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-01-20 22:13:23,157 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-01-20 22:13:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:23,157 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-01-20 22:13:23,157 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-20 22:13:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-01-20 22:13:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-20 22:13:23,158 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:23,158 INFO L322 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:23,158 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:23,158 INFO L82 PathProgramCache]: Analyzing trace with hash 4448816, now seen corresponding path program 18 times [2018-01-20 22:13:23,158 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:23,158 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:23,159 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:23,159 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:23,159 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:23,166 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:23,423 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:23,423 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:23,428 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:23,436 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,438 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,439 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,440 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,441 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,442 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,443 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,444 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,446 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,447 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:23,447 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:23,449 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:23,489 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:23,490 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-01-20 22:13:23,490 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-20 22:13:23,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-20 22:13:23,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2018-01-20 22:13:23,491 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 23 states. [2018-01-20 22:13:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:23,535 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-01-20 22:13:23,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-20 22:13:23,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2018-01-20 22:13:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:23,536 INFO L225 Difference]: With dead ends: 46 [2018-01-20 22:13:23,536 INFO L226 Difference]: Without dead ends: 37 [2018-01-20 22:13:23,536 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=315, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:13:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-20 22:13:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-20 22:13:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-20 22:13:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-01-20 22:13:23,540 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-01-20 22:13:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:23,541 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-01-20 22:13:23,541 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-20 22:13:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-01-20 22:13:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-20 22:13:23,542 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:23,542 INFO L322 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:23,542 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:23,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1264061845, now seen corresponding path program 19 times [2018-01-20 22:13:23,542 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:23,542 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:23,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:23,543 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:23,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:23,551 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:23,856 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:23,856 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:23,860 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:23,872 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:23,906 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:23,906 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-01-20 22:13:23,906 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-20 22:13:23,906 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-20 22:13:23,906 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:13:23,907 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 24 states. [2018-01-20 22:13:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:23,969 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-01-20 22:13:23,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-20 22:13:23,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2018-01-20 22:13:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:23,969 INFO L225 Difference]: With dead ends: 47 [2018-01-20 22:13:23,969 INFO L226 Difference]: Without dead ends: 38 [2018-01-20 22:13:23,970 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:13:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-20 22:13:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-20 22:13:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-20 22:13:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-01-20 22:13:23,973 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-01-20 22:13:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:23,973 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-01-20 22:13:23,973 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-20 22:13:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-01-20 22:13:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-20 22:13:23,974 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:23,974 INFO L322 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:23,974 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1933186672, now seen corresponding path program 20 times [2018-01-20 22:13:23,974 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:23,974 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:23,975 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:23,975 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:23,975 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:23,981 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:24,225 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:24,225 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:24,230 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:24,236 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:24,241 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:24,242 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:24,243 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:24,289 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:24,290 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-01-20 22:13:24,290 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-20 22:13:24,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-20 22:13:24,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:13:24,290 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 25 states. [2018-01-20 22:13:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:24,315 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-01-20 22:13:24,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-20 22:13:24,316 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2018-01-20 22:13:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:24,316 INFO L225 Difference]: With dead ends: 48 [2018-01-20 22:13:24,316 INFO L226 Difference]: Without dead ends: 39 [2018-01-20 22:13:24,317 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2018-01-20 22:13:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-20 22:13:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-20 22:13:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-20 22:13:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-01-20 22:13:24,319 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-01-20 22:13:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:24,319 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-01-20 22:13:24,319 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-20 22:13:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-01-20 22:13:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-20 22:13:24,320 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:24,320 INFO L322 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:24,320 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:24,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1201219829, now seen corresponding path program 21 times [2018-01-20 22:13:24,320 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:24,320 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:24,321 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:24,321 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:24,321 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:24,326 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:24,509 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:24,509 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:24,514 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:24,521 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,523 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,524 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,525 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,526 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,527 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,528 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,529 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,530 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,531 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,533 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,534 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:24,534 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:24,535 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:24,571 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:24,571 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-01-20 22:13:24,572 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-20 22:13:24,572 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-20 22:13:24,572 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-01-20 22:13:24,572 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 26 states. [2018-01-20 22:13:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:24,621 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-01-20 22:13:24,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-20 22:13:24,621 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2018-01-20 22:13:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:24,622 INFO L225 Difference]: With dead ends: 49 [2018-01-20 22:13:24,622 INFO L226 Difference]: Without dead ends: 40 [2018-01-20 22:13:24,623 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:13:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-20 22:13:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-20 22:13:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-20 22:13:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-01-20 22:13:24,626 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-01-20 22:13:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:24,626 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-01-20 22:13:24,626 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-20 22:13:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-01-20 22:13:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-20 22:13:24,627 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:24,627 INFO L322 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:24,627 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:24,627 INFO L82 PathProgramCache]: Analyzing trace with hash 14915824, now seen corresponding path program 22 times [2018-01-20 22:13:24,627 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:24,627 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:24,628 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:24,628 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:24,628 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:24,634 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:24,964 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:24,964 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 [2018-01-20 22:13:24,983 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:24,999 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:25,001 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:25,043 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:25,043 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-01-20 22:13:25,044 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-20 22:13:25,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-20 22:13:25,044 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:13:25,044 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 27 states. [2018-01-20 22:13:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:25,090 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-01-20 22:13:25,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-20 22:13:25,092 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 39 [2018-01-20 22:13:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:25,092 INFO L225 Difference]: With dead ends: 50 [2018-01-20 22:13:25,093 INFO L226 Difference]: Without dead ends: 41 [2018-01-20 22:13:25,093 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2018-01-20 22:13:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-20 22:13:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-20 22:13:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-20 22:13:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-01-20 22:13:25,098 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-01-20 22:13:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:25,098 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-01-20 22:13:25,098 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-20 22:13:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-01-20 22:13:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-20 22:13:25,099 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:25,099 INFO L322 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:25,099 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash -939584597, now seen corresponding path program 23 times [2018-01-20 22:13:25,099 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:25,099 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:25,100 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:25,100 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:25,100 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:25,109 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:25,416 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:25,416 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 [2018-01-20 22:13:25,424 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:25,428 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,429 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,430 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,431 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,432 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,433 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,434 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,435 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,437 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,438 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,439 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,440 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,444 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:25,446 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:25,448 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:25,481 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:25,481 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-01-20 22:13:25,481 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-20 22:13:25,481 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-20 22:13:25,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-01-20 22:13:25,482 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 28 states. [2018-01-20 22:13:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:25,522 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-01-20 22:13:25,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-20 22:13:25,523 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 40 [2018-01-20 22:13:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:25,523 INFO L225 Difference]: With dead ends: 51 [2018-01-20 22:13:25,524 INFO L226 Difference]: Without dead ends: 42 [2018-01-20 22:13:25,524 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2018-01-20 22:13:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-20 22:13:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-20 22:13:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-20 22:13:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-01-20 22:13:25,528 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-01-20 22:13:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:25,528 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-01-20 22:13:25,528 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-20 22:13:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-01-20 22:13:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-20 22:13:25,528 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:25,529 INFO L322 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:25,529 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:25,529 INFO L82 PathProgramCache]: Analyzing trace with hash -464326576, now seen corresponding path program 24 times [2018-01-20 22:13:25,529 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:25,529 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:25,530 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:25,530 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:25,530 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:25,539 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:25,830 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:25,830 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 [2018-01-20 22:13:25,836 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:25,843 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,845 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,846 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,847 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,848 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,849 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,850 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,851 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,852 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,853 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,854 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,856 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,857 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:25,857 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:25,859 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:25,897 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:25,897 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-01-20 22:13:25,898 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-20 22:13:25,898 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-20 22:13:25,898 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2018-01-20 22:13:25,898 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 29 states. [2018-01-20 22:13:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:25,934 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-01-20 22:13:25,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-20 22:13:25,934 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-01-20 22:13:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:25,934 INFO L225 Difference]: With dead ends: 52 [2018-01-20 22:13:25,935 INFO L226 Difference]: Without dead ends: 43 [2018-01-20 22:13:25,935 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:13:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-20 22:13:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-20 22:13:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-20 22:13:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-01-20 22:13:25,938 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-01-20 22:13:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:25,938 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-01-20 22:13:25,938 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-20 22:13:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-01-20 22:13:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-20 22:13:25,939 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:25,939 INFO L322 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:25,939 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1383770187, now seen corresponding path program 25 times [2018-01-20 22:13:25,940 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:25,940 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:25,941 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:25,941 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:25,941 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:25,953 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:26,238 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:26,238 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 [2018-01-20 22:13:26,244 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:26,264 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:26,315 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:26,315 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-01-20 22:13:26,316 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-20 22:13:26,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-20 22:13:26,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:13:26,316 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 30 states. [2018-01-20 22:13:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:26,362 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-01-20 22:13:26,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-20 22:13:26,363 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-01-20 22:13:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:26,364 INFO L225 Difference]: With dead ends: 53 [2018-01-20 22:13:26,364 INFO L226 Difference]: Without dead ends: 44 [2018-01-20 22:13:26,365 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=412, Invalid=518, Unknown=0, NotChecked=0, Total=930 [2018-01-20 22:13:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-20 22:13:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-20 22:13:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-20 22:13:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-01-20 22:13:26,369 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-01-20 22:13:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:26,369 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-01-20 22:13:26,369 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-20 22:13:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-01-20 22:13:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-20 22:13:26,370 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:26,370 INFO L322 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:26,370 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:26,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1454772304, now seen corresponding path program 26 times [2018-01-20 22:13:26,370 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:26,371 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:26,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:26,371 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:26,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:26,381 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:26,698 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:26,698 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 [2018-01-20 22:13:26,704 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:26,712 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:26,718 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:26,720 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:26,721 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:26,769 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:26,769 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-01-20 22:13:26,769 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-20 22:13:26,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-20 22:13:26,770 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-01-20 22:13:26,770 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 31 states. [2018-01-20 22:13:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:26,824 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-01-20 22:13:26,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-20 22:13:26,825 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 43 [2018-01-20 22:13:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:26,825 INFO L225 Difference]: With dead ends: 54 [2018-01-20 22:13:26,825 INFO L226 Difference]: Without dead ends: 45 [2018-01-20 22:13:26,826 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=441, Invalid=551, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:13:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-20 22:13:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-20 22:13:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-20 22:13:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-01-20 22:13:26,828 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-01-20 22:13:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:26,828 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-01-20 22:13:26,828 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-20 22:13:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-01-20 22:13:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-20 22:13:26,829 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:26,829 INFO L322 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:26,829 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:26,829 INFO L82 PathProgramCache]: Analyzing trace with hash 744723691, now seen corresponding path program 27 times [2018-01-20 22:13:26,829 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:26,829 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:26,830 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:26,830 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:26,830 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:26,839 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:27,187 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:27,187 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 [2018-01-20 22:13:27,193 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:27,200 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,202 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,203 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,204 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,205 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,206 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,207 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,208 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,209 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,210 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,211 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,213 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,214 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,215 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,216 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:27,217 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:27,218 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:27,267 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:27,267 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-01-20 22:13:27,267 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-20 22:13:27,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-20 22:13:27,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:13:27,268 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 32 states. [2018-01-20 22:13:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:27,348 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-01-20 22:13:27,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-20 22:13:27,350 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2018-01-20 22:13:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:27,351 INFO L225 Difference]: With dead ends: 55 [2018-01-20 22:13:27,351 INFO L226 Difference]: Without dead ends: 46 [2018-01-20 22:13:27,351 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2018-01-20 22:13:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-20 22:13:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-20 22:13:27,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-20 22:13:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-01-20 22:13:27,354 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-01-20 22:13:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:27,354 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-01-20 22:13:27,354 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-20 22:13:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-01-20 22:13:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-20 22:13:27,355 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:27,355 INFO L322 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:27,355 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash 209622800, now seen corresponding path program 28 times [2018-01-20 22:13:27,355 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:27,355 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:27,356 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:27,356 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:27,356 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:27,366 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:27,640 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:27,640 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 [2018-01-20 22:13:27,649 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:27,667 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:27,670 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:27,717 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:27,717 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-01-20 22:13:27,718 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-20 22:13:27,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-20 22:13:27,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2018-01-20 22:13:27,719 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 33 states. [2018-01-20 22:13:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:27,787 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-01-20 22:13:27,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-20 22:13:27,787 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 45 [2018-01-20 22:13:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:27,788 INFO L225 Difference]: With dead ends: 56 [2018-01-20 22:13:27,788 INFO L226 Difference]: Without dead ends: 47 [2018-01-20 22:13:27,788 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=620, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:13:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-20 22:13:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-20 22:13:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-20 22:13:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-01-20 22:13:27,791 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-01-20 22:13:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:27,792 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-01-20 22:13:27,792 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-20 22:13:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-01-20 22:13:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-20 22:13:27,792 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:27,792 INFO L322 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:27,792 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:27,792 INFO L82 PathProgramCache]: Analyzing trace with hash 801364363, now seen corresponding path program 29 times [2018-01-20 22:13:27,792 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:27,793 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:27,793 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:27,793 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:27,793 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:27,801 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:28,143 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:28,143 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 [2018-01-20 22:13:28,151 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:28,155 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,156 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,157 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,158 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,159 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,160 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,161 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,162 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,162 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,163 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,164 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,165 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,166 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,167 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,168 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,172 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:28,173 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:28,175 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:28,210 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:28,210 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-01-20 22:13:28,210 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-20 22:13:28,211 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-20 22:13:28,211 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:13:28,211 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 34 states. [2018-01-20 22:13:28,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:28,274 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-01-20 22:13:28,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-20 22:13:28,275 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 46 [2018-01-20 22:13:28,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:28,275 INFO L225 Difference]: With dead ends: 57 [2018-01-20 22:13:28,275 INFO L226 Difference]: Without dead ends: 48 [2018-01-20 22:13:28,276 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=534, Invalid=656, Unknown=0, NotChecked=0, Total=1190 [2018-01-20 22:13:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-20 22:13:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-20 22:13:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-20 22:13:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-01-20 22:13:28,279 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-01-20 22:13:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:28,280 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-01-20 22:13:28,280 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-20 22:13:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-01-20 22:13:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-20 22:13:28,280 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:28,280 INFO L322 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:28,280 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:28,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1965483632, now seen corresponding path program 30 times [2018-01-20 22:13:28,281 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:28,281 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:28,281 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:28,281 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:28,281 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:28,289 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:28,786 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:28,825 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 [2018-01-20 22:13:28,832 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:28,840 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,847 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,848 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,849 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,851 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,852 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,853 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,855 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,856 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,862 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,864 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,865 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,867 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,869 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,871 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,873 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:28,873 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:28,876 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:28,911 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:28,911 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-01-20 22:13:28,912 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-20 22:13:28,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-20 22:13:28,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2018-01-20 22:13:28,912 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 35 states. [2018-01-20 22:13:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:29,015 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-01-20 22:13:29,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-20 22:13:29,015 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 47 [2018-01-20 22:13:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:29,016 INFO L225 Difference]: With dead ends: 58 [2018-01-20 22:13:29,016 INFO L226 Difference]: Without dead ends: 49 [2018-01-20 22:13:29,016 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=567, Invalid=693, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 22:13:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-20 22:13:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-20 22:13:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-20 22:13:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-01-20 22:13:29,019 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-01-20 22:13:29,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:29,019 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-01-20 22:13:29,019 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-20 22:13:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-01-20 22:13:29,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-20 22:13:29,020 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:29,020 INFO L322 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:29,020 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:29,020 INFO L82 PathProgramCache]: Analyzing trace with hash -601524693, now seen corresponding path program 31 times [2018-01-20 22:13:29,020 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:29,020 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:29,021 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:29,021 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:29,021 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:29,028 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:29,373 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:29,373 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 [2018-01-20 22:13:29,378 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:29,399 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:29,439 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:29,439 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-01-20 22:13:29,440 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-20 22:13:29,440 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-20 22:13:29,440 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 22:13:29,440 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 36 states. [2018-01-20 22:13:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:29,483 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-01-20 22:13:29,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-20 22:13:29,483 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2018-01-20 22:13:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:29,484 INFO L225 Difference]: With dead ends: 59 [2018-01-20 22:13:29,484 INFO L226 Difference]: Without dead ends: 50 [2018-01-20 22:13:29,484 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=601, Invalid=731, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:13:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-20 22:13:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-20 22:13:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-20 22:13:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-01-20 22:13:29,487 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-01-20 22:13:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:29,487 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-01-20 22:13:29,487 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-20 22:13:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-01-20 22:13:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-20 22:13:29,488 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:29,488 INFO L322 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:29,488 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:29,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1425595856, now seen corresponding path program 32 times [2018-01-20 22:13:29,488 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:29,488 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:29,489 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:29,489 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:29,489 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:29,496 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:29,839 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:29,839 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 [2018-01-20 22:13:29,844 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:29,850 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:29,856 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:29,858 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:29,860 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:29,891 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:29,891 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-01-20 22:13:29,891 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-20 22:13:29,892 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-20 22:13:29,892 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:13:29,892 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 37 states. [2018-01-20 22:13:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:29,955 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-01-20 22:13:29,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-20 22:13:29,955 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 49 [2018-01-20 22:13:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:29,956 INFO L225 Difference]: With dead ends: 60 [2018-01-20 22:13:29,956 INFO L226 Difference]: Without dead ends: 51 [2018-01-20 22:13:29,956 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=636, Invalid=770, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:13:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-20 22:13:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-20 22:13:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-20 22:13:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-01-20 22:13:29,959 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-01-20 22:13:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:29,959 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-01-20 22:13:29,959 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-20 22:13:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-01-20 22:13:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-20 22:13:29,959 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:29,959 INFO L322 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:29,959 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:29,960 INFO L82 PathProgramCache]: Analyzing trace with hash -158176565, now seen corresponding path program 33 times [2018-01-20 22:13:29,960 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:29,960 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:29,960 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:29,960 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:29,960 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:29,967 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:30,344 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:30,344 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 [2018-01-20 22:13:30,349 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:30,356 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,357 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,358 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,359 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,360 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,361 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,362 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,363 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,364 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,366 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,367 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,368 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,369 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,370 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,372 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,373 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,374 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,375 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:30,376 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:30,378 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:30,412 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:30,413 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-01-20 22:13:30,413 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-20 22:13:30,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-20 22:13:30,413 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:13:30,414 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 38 states. [2018-01-20 22:13:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:30,459 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-01-20 22:13:30,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-20 22:13:30,460 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2018-01-20 22:13:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:30,460 INFO L225 Difference]: With dead ends: 61 [2018-01-20 22:13:30,460 INFO L226 Difference]: Without dead ends: 52 [2018-01-20 22:13:30,461 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=672, Invalid=810, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:13:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-20 22:13:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-20 22:13:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-20 22:13:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-01-20 22:13:30,463 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-01-20 22:13:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:30,463 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-01-20 22:13:30,463 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-20 22:13:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-01-20 22:13:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-20 22:13:30,463 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:30,464 INFO L322 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:30,464 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:30,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2010481360, now seen corresponding path program 34 times [2018-01-20 22:13:30,464 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:30,464 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:30,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:30,464 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:30,465 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:30,471 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:31,061 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:31,061 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 [2018-01-20 22:13:31,067 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:31,086 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:31,088 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:31,123 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:31,123 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-01-20 22:13:31,123 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-20 22:13:31,123 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-20 22:13:31,124 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:13:31,124 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 39 states. [2018-01-20 22:13:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:31,190 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-01-20 22:13:31,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-20 22:13:31,190 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 51 [2018-01-20 22:13:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:31,191 INFO L225 Difference]: With dead ends: 62 [2018-01-20 22:13:31,191 INFO L226 Difference]: Without dead ends: 53 [2018-01-20 22:13:31,192 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 22:13:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-20 22:13:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-20 22:13:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-20 22:13:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-01-20 22:13:31,195 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-01-20 22:13:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:31,195 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-01-20 22:13:31,195 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-20 22:13:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-01-20 22:13:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-20 22:13:31,196 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:31,196 INFO L322 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:31,196 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 697612139, now seen corresponding path program 35 times [2018-01-20 22:13:31,197 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:31,197 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:31,198 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:31,198 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:31,198 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:31,210 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:31,697 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:31,697 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 [2018-01-20 22:13:31,702 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:31,706 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,708 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,709 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,710 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,711 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,712 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,713 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,714 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,715 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,716 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,717 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,719 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,720 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,721 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,722 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,723 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,724 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,726 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,731 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:31,732 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:31,735 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:31,771 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:31,771 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-01-20 22:13:31,771 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-20 22:13:31,772 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-20 22:13:31,772 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 22:13:31,772 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 40 states. [2018-01-20 22:13:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:31,834 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-01-20 22:13:31,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-20 22:13:31,835 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 52 [2018-01-20 22:13:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:31,835 INFO L225 Difference]: With dead ends: 63 [2018-01-20 22:13:31,836 INFO L226 Difference]: Without dead ends: 54 [2018-01-20 22:13:31,836 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2018-01-20 22:13:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-20 22:13:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-20 22:13:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-20 22:13:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-01-20 22:13:31,839 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-01-20 22:13:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:31,839 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-01-20 22:13:31,839 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-20 22:13:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-01-20 22:13:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-20 22:13:31,840 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:31,840 INFO L322 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:31,840 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1250835312, now seen corresponding path program 36 times [2018-01-20 22:13:31,840 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:31,840 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:31,841 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:31,841 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:31,841 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:31,851 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:32,320 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:32,320 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 [2018-01-20 22:13:32,330 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:32,339 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,342 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,343 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,344 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,346 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,347 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,348 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,350 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,351 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,352 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,354 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,356 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,357 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,358 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,360 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,361 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,363 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,364 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,366 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:32,366 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:32,369 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:32,404 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:32,404 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-01-20 22:13:32,404 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-20 22:13:32,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-20 22:13:32,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-01-20 22:13:32,405 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 41 states. [2018-01-20 22:13:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:32,472 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-01-20 22:13:32,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-20 22:13:32,473 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 53 [2018-01-20 22:13:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:32,474 INFO L225 Difference]: With dead ends: 64 [2018-01-20 22:13:32,474 INFO L226 Difference]: Without dead ends: 55 [2018-01-20 22:13:32,474 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=786, Invalid=936, Unknown=0, NotChecked=0, Total=1722 [2018-01-20 22:13:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-20 22:13:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-20 22:13:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-20 22:13:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-01-20 22:13:32,477 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-01-20 22:13:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:32,477 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-01-20 22:13:32,477 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-20 22:13:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-01-20 22:13:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-20 22:13:32,478 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:32,478 INFO L322 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:32,478 INFO L371 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:32,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1523164149, now seen corresponding path program 37 times [2018-01-20 22:13:32,479 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:32,479 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:32,479 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:32,479 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:32,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:32,487 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:33,122 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:33,122 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 [2018-01-20 22:13:33,126 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:33,142 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:33,175 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:33,175 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-01-20 22:13:33,176 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-20 22:13:33,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-20 22:13:33,176 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2018-01-20 22:13:33,176 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 42 states. [2018-01-20 22:13:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:33,217 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-01-20 22:13:33,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-20 22:13:33,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 54 [2018-01-20 22:13:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:33,217 INFO L225 Difference]: With dead ends: 65 [2018-01-20 22:13:33,217 INFO L226 Difference]: Without dead ends: 56 [2018-01-20 22:13:33,218 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=826, Invalid=980, Unknown=0, NotChecked=0, Total=1806 [2018-01-20 22:13:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-20 22:13:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-20 22:13:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-20 22:13:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-01-20 22:13:33,220 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-01-20 22:13:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:33,220 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-01-20 22:13:33,220 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-20 22:13:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-01-20 22:13:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-20 22:13:33,221 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:33,221 INFO L322 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:33,221 INFO L371 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1375423504, now seen corresponding path program 38 times [2018-01-20 22:13:33,221 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:33,221 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:33,222 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:33,222 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:33,222 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:33,231 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:33,729 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:33,729 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 [2018-01-20 22:13:33,733 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:33,741 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:33,750 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:33,752 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:33,754 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:33,792 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:33,793 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-01-20 22:13:33,826 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-01-20 22:13:33,826 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-01-20 22:13:33,827 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2018-01-20 22:13:33,827 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 43 states. [2018-01-20 22:13:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:33,907 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-01-20 22:13:33,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-20 22:13:33,907 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 55 [2018-01-20 22:13:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:33,908 INFO L225 Difference]: With dead ends: 66 [2018-01-20 22:13:33,908 INFO L226 Difference]: Without dead ends: 57 [2018-01-20 22:13:33,908 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=867, Invalid=1025, Unknown=0, NotChecked=0, Total=1892 [2018-01-20 22:13:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-20 22:13:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-20 22:13:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-20 22:13:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-01-20 22:13:33,910 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-01-20 22:13:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:33,911 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-01-20 22:13:33,911 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-01-20 22:13:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-01-20 22:13:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-20 22:13:33,911 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:33,911 INFO L322 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:33,911 INFO L371 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:33,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1090430805, now seen corresponding path program 39 times [2018-01-20 22:13:33,911 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:33,912 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:33,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:33,912 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:33,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:33,919 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:34,399 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:34,399 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 [2018-01-20 22:13:34,403 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:34,411 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,412 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,413 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,414 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,415 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,416 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,417 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,418 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,419 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,420 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,421 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,422 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,423 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,425 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,426 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,427 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,428 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,429 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,431 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,432 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,433 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:34,433 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:34,435 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:34,467 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:34,468 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-01-20 22:13:34,468 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-20 22:13:34,468 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-20 22:13:34,469 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-01-20 22:13:34,469 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 44 states. [2018-01-20 22:13:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:34,512 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-01-20 22:13:34,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-20 22:13:34,513 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 56 [2018-01-20 22:13:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:34,513 INFO L225 Difference]: With dead ends: 67 [2018-01-20 22:13:34,513 INFO L226 Difference]: Without dead ends: 58 [2018-01-20 22:13:34,514 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=909, Invalid=1071, Unknown=0, NotChecked=0, Total=1980 [2018-01-20 22:13:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-20 22:13:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-20 22:13:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-20 22:13:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-01-20 22:13:34,517 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-01-20 22:13:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:34,517 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-01-20 22:13:34,517 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-20 22:13:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-01-20 22:13:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-20 22:13:34,518 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:34,518 INFO L322 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:34,518 INFO L371 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:34,518 INFO L82 PathProgramCache]: Analyzing trace with hash -845591728, now seen corresponding path program 40 times [2018-01-20 22:13:34,518 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:34,518 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:34,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:34,519 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:34,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:34,525 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:35,025 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:35,025 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 [2018-01-20 22:13:35,029 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:35,047 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:35,049 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:35,086 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:35,086 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-01-20 22:13:35,086 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-01-20 22:13:35,086 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-01-20 22:13:35,087 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2018-01-20 22:13:35,087 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 45 states. [2018-01-20 22:13:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:35,140 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-01-20 22:13:35,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-20 22:13:35,140 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 57 [2018-01-20 22:13:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:35,141 INFO L225 Difference]: With dead ends: 68 [2018-01-20 22:13:35,141 INFO L226 Difference]: Without dead ends: 59 [2018-01-20 22:13:35,142 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=952, Invalid=1118, Unknown=0, NotChecked=0, Total=2070 [2018-01-20 22:13:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-20 22:13:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-20 22:13:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-20 22:13:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-01-20 22:13:35,145 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-01-20 22:13:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:35,145 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-01-20 22:13:35,146 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-01-20 22:13:35,146 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-01-20 22:13:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-20 22:13:35,146 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:35,146 INFO L322 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:35,146 INFO L371 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:35,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1845514933, now seen corresponding path program 41 times [2018-01-20 22:13:35,147 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:35,147 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:35,148 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,148 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:35,148 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:13:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:13:35,183 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 22:13:35,190 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:13:35,196 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2018-01-20 22:13:35,197 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:13:35,197 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:13:35,204 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:13:35,204 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:13:35,204 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:13:35,205 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:13:35,205 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:13:35,205 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:13:35,205 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:13:35,205 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 22:13:35,205 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:13:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-20 22:13:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-20 22:13:35,206 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:35,206 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:35,207 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-20 22:13:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1259858052, now seen corresponding path program 1 times [2018-01-20 22:13:35,207 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:35,207 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:35,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,208 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:35,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:35,212 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:35,226 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:13:35,226 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-20 22:13:35,226 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 22:13:35,226 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 22:13:35,226 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 22:13:35,226 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2018-01-20 22:13:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:35,246 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-20 22:13:35,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 22:13:35,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-20 22:13:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:35,246 INFO L225 Difference]: With dead ends: 33 [2018-01-20 22:13:35,246 INFO L226 Difference]: Without dead ends: 17 [2018-01-20 22:13:35,247 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 [2018-01-20 22:13:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-01-20 22:13:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-01-20 22:13:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-01-20 22:13:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-01-20 22:13:35,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-01-20 22:13:35,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:35,248 INFO L432 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-01-20 22:13:35,248 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 22:13:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-01-20 22:13:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-20 22:13:35,249 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:35,249 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:35,249 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-20 22:13:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash -956542153, now seen corresponding path program 1 times [2018-01-20 22:13:35,249 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:35,249 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:35,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,250 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:35,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:35,252 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:35,275 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:35,276 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 [2018-01-20 22:13:35,290 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:35,300 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:35,337 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:35,337 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-20 22:13:35,338 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 22:13:35,338 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 22:13:35,338 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-20 22:13:35,338 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-01-20 22:13:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:35,349 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-01-20 22:13:35,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 22:13:35,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-01-20 22:13:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:35,350 INFO L225 Difference]: With dead ends: 25 [2018-01-20 22:13:35,350 INFO L226 Difference]: Without dead ends: 18 [2018-01-20 22:13:35,350 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:13:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-20 22:13:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-20 22:13:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-20 22:13:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-20 22:13:35,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-01-20 22:13:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:35,351 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-20 22:13:35,352 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 22:13:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-20 22:13:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 22:13:35,352 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:35,352 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:35,352 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-20 22:13:35,352 INFO L82 PathProgramCache]: Analyzing trace with hash -143683876, now seen corresponding path program 2 times [2018-01-20 22:13:35,352 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:35,352 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:35,353 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,353 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:35,353 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:35,356 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:13:35,398 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:35,399 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:13:35,407 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:35,413 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:35,415 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:35,416 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:35,461 INFO L700 Elim1Store]: detected not equals via solver [2018-01-20 22:13:35,483 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 [2018-01-20 22:13:35,483 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-20 22:13:35,485 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. [2018-01-20 22:13:35,486 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-01-20 22:13:35,554 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 [2018-01-20 22:13:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-20 22:13:35,580 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-20 22:13:35,580 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2018-01-20 22:13:35,580 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:13:35,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:13:35,581 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2018-01-20 22:13:35,581 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2018-01-20 22:13:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:35,842 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-01-20 22:13:35,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 22:13:35,843 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-01-20 22:13:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:35,843 INFO L225 Difference]: With dead ends: 25 [2018-01-20 22:13:35,843 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 22:13:35,844 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=153, Unknown=1, NotChecked=26, Total=240 [2018-01-20 22:13:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 22:13:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 22:13:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 22:13:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 22:13:35,845 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-01-20 22:13:35,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:35,845 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 22:13:35,846 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:13:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 22:13:35,846 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 22:13:35,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 10:13:35 BoogieIcfgContainer [2018-01-20 22:13:35,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 22:13:35,852 INFO L168 Benchmark]: Toolchain (without parser) took 18044.80 ms. Allocated memory was 305.7 MB in the beginning and 686.3 MB in the end (delta: 380.6 MB). Free memory was 265.0 MB in the beginning and 335.8 MB in the end (delta: -70.8 MB). Peak memory consumption was 309.8 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:35,854 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 305.7 MB. Free memory is still 269.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 22:13:35,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.39 ms. Allocated memory is still 305.7 MB. Free memory was 265.0 MB in the beginning and 257.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:35,854 INFO L168 Benchmark]: Boogie Preprocessor took 28.47 ms. Allocated memory is still 305.7 MB. Free memory was 257.0 MB in the beginning and 255.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:35,855 INFO L168 Benchmark]: RCFGBuilder took 185.19 ms. Allocated memory is still 305.7 MB. Free memory was 255.0 MB in the beginning and 243.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:35,855 INFO L168 Benchmark]: TraceAbstraction took 17652.44 ms. Allocated memory was 305.7 MB in the beginning and 686.3 MB in the end (delta: 380.6 MB). Free memory was 242.4 MB in the beginning and 335.8 MB in the end (delta: -93.3 MB). Peak memory consumption was 287.3 MB. Max. memory is 5.3 GB. [2018-01-20 22:13:35,857 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 305.7 MB. Free memory is still 269.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 171.39 ms. Allocated memory is still 305.7 MB. Free memory was 265.0 MB in the beginning and 257.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 28.47 ms. Allocated memory is still 305.7 MB. Free memory was 257.0 MB in the beginning and 255.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 185.19 ms. Allocated memory is still 305.7 MB. Free memory was 255.0 MB in the beginning and 243.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 17652.44 ms. Allocated memory was 305.7 MB in the beginning and 686.3 MB in the end (delta: 380.6 MB). Free memory was 242.4 MB in the beginning and 335.8 MB in the end (delta: -93.3 MB). Peak memory consumption was 287.3 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), 0, 41UL) VAL [cstats={42:0}, memset((void *)(& cstats), 0, 41UL)={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, 16.8s OverallTime, 42 OverallIterations, 41 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 659 SDtfs, 82 SDslu, 10513 SDs, 0 SdLazy, 1749 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2485 GetRequests, 1502 SyntacticMatches, 0 SemanticMatches, 983 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=41, 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, 41 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 3075 NumberOfCodeBlocks, 3075 NumberOfCodeBlocksAsserted, 299 NumberOfCheckSat, 2936 ConstructedInterpolants, 0 QuantifiedInterpolants, 276152 SizeOfPredicates, 40 NumberOfNonLiveVariables, 4900 ConjunctsInSsa, 940 ConjunctsInUnsatCore, 81 InterpolantComputations, 1 PerfectInterpolantSequences, 0/22960 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, 0.6s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 14 SDslu, 106 SDs, 0 SdLazy, 72 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 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, 3066 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/memset2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_22-13-35-867.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_22-13-35-867.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_22-13-35-867.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_22-13-35-867.csv Received shutdown request...