java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_false-valid-deref-read.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:37:44,274 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:37:44,277 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:37:44,293 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:37:44,293 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:37:44,294 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:37:44,295 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:37:44,297 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:37:44,299 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:37:44,300 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:37:44,300 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:37:44,301 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:37:44,301 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:37:44,302 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:37:44,303 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:37:44,306 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:37:44,308 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:37:44,311 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:37:44,312 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:37:44,314 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:37:44,317 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:37:44,317 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:37:44,317 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:37:44,319 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:37:44,320 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:37:44,321 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:37:44,322 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:37:44,322 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:37:44,323 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:37:44,323 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:37:44,324 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:37:44,324 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:37:44,349 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:37:44,350 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:37:44,350 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:37:44,351 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:37:44,351 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:37:44,351 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:37:44,351 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:37:44,352 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:37:44,352 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:37:44,352 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:37:44,353 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:37:44,353 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:37:44,353 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:37:44,353 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:37:44,353 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:37:44,354 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:37:44,354 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:37:44,354 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:37:44,354 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:37:44,354 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:37:44,355 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:37:44,355 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:37:44,355 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:37:44,355 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:37:44,355 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:37:44,356 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:37:44,356 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:37:44,356 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:37:44,356 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:37:44,357 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:37:44,357 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:37:44,357 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:37:44,357 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:37:44,357 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:37:44,358 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:37:44,358 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:37:44,359 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:37:44,395 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:37:44,427 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:37:44,432 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:37:44,434 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:37:44,434 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:37:44,435 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_false-valid-deref-read.c [2018-01-23 14:37:44,550 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:37:44,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:37:44,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:37:44,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:37:44,565 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:37:44,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:37:44" (1/1) ... [2018-01-23 14:37:44,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b199dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44, skipping insertion in model container [2018-01-23 14:37:44,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:37:44" (1/1) ... [2018-01-23 14:37:44,587 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:37:44,607 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:37:44,724 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:37:44,742 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:37:44,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44 WrapperNode [2018-01-23 14:37:44,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:37:44,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:37:44,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:37:44,749 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:37:44,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44" (1/1) ... [2018-01-23 14:37:44,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44" (1/1) ... [2018-01-23 14:37:44,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44" (1/1) ... [2018-01-23 14:37:44,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44" (1/1) ... [2018-01-23 14:37:44,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44" (1/1) ... [2018-01-23 14:37:44,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44" (1/1) ... [2018-01-23 14:37:44,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44" (1/1) ... [2018-01-23 14:37:44,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:37:44,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:37:44,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:37:44,777 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:37:44,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:37:44,843 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:37:44,843 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:37:44,843 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-23 14:37:44,843 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:37:44,844 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:37:44,844 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:37:44,844 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:37:44,844 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:37:44,844 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:37:44,844 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-23 14:37:44,844 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:37:44,844 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:37:44,844 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:37:45,017 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:37:45,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:37:45 BoogieIcfgContainer [2018-01-23 14:37:45,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:37:45,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:37:45,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:37:45,020 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:37:45,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:37:44" (1/3) ... [2018-01-23 14:37:45,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb060af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:37:45, skipping insertion in model container [2018-01-23 14:37:45,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:37:44" (2/3) ... [2018-01-23 14:37:45,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb060af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:37:45, skipping insertion in model container [2018-01-23 14:37:45,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:37:45" (3/3) ... [2018-01-23 14:37:45,023 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_false-valid-deref-read.c [2018-01-23 14:37:45,030 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:37:45,036 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:37:45,084 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:37:45,085 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:37:45,085 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:37:45,085 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:37:45,085 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:37:45,085 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:37:45,085 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:37:45,086 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:37:45,086 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:37:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-23 14:37:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:37:45,108 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:45,110 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:37:45,110 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:37:45,116 INFO L82 PathProgramCache]: Analyzing trace with hash 102829, now seen corresponding path program 1 times [2018-01-23 14:37:45,118 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:45,119 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:45,165 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,165 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:45,165 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:37:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:37:45,225 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:37:45,231 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:37:45,236 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:37:45,237 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:37:45,237 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:37:45,237 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:37:45,237 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:37:45,237 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:37:45,237 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:37:45,237 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-23 14:37:45,237 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:37:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-23 14:37:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-23 14:37:45,239 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:45,240 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:45,240 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-23 14:37:45,240 INFO L82 PathProgramCache]: Analyzing trace with hash 33657389, now seen corresponding path program 1 times [2018-01-23 14:37:45,240 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:45,240 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:45,241 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,241 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:45,241 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:45,268 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:37:45,303 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:37:45,303 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:37:45,304 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:37:45,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:37:45,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:37:45,319 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-23 14:37:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:45,339 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2018-01-23 14:37:45,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:37:45,341 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-23 14:37:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:45,349 INFO L225 Difference]: With dead ends: 76 [2018-01-23 14:37:45,350 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:37:45,353 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:37:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:37:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:37:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:37:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:37:45,460 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-23 14:37:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:45,460 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:37:45,460 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:37:45,460 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:37:45,460 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:37:45,463 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:37:45,463 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:37:45,463 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:37:45,464 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:37:45,464 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:37:45,464 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:37:45,464 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:37:45,464 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:37:45,464 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:37:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-23 14:37:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:37:45,468 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:45,468 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:45,468 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1331820257, now seen corresponding path program 1 times [2018-01-23 14:37:45,469 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:45,469 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:45,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,470 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:45,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:45,481 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:37:45,496 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:37:45,497 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:37:45,497 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:37:45,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:37:45,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:37:45,498 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-23 14:37:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:45,504 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2018-01-23 14:37:45,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:37:45,504 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-23 14:37:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:45,507 INFO L225 Difference]: With dead ends: 76 [2018-01-23 14:37:45,507 INFO L226 Difference]: Without dead ends: 39 [2018-01-23 14:37:45,508 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:37:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-23 14:37:45,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-23 14:37:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-23 14:37:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-01-23 14:37:45,522 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 17 [2018-01-23 14:37:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:45,522 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-01-23 14:37:45,522 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:37:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-01-23 14:37:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:37:45,524 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:45,524 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:45,525 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1785977394, now seen corresponding path program 1 times [2018-01-23 14:37:45,525 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:45,525 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:45,526 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,526 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:45,527 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:45,541 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:37:45,582 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:37:45,582 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:37:45,584 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:37:45,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:37:45,585 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:37:45,585 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 3 states. [2018-01-23 14:37:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:45,628 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2018-01-23 14:37:45,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:37:45,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-23 14:37:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:45,630 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:37:45,630 INFO L226 Difference]: Without dead ends: 43 [2018-01-23 14:37:45,631 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:37:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-23 14:37:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2018-01-23 14:37:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-23 14:37:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-01-23 14:37:45,644 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 19 [2018-01-23 14:37:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:45,644 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-01-23 14:37:45,644 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:37:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-01-23 14:37:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-23 14:37:45,645 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:45,645 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:45,645 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash -751966911, now seen corresponding path program 1 times [2018-01-23 14:37:45,646 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:45,646 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:45,647 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,647 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:45,647 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:45,669 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:37:45,817 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:37:45,817 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-23 14:37:45,818 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-23 14:37:45,818 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-23 14:37:45,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:37:45,819 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 6 states. [2018-01-23 14:37:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:45,967 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2018-01-23 14:37:45,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:37:45,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-01-23 14:37:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:45,971 INFO L225 Difference]: With dead ends: 79 [2018-01-23 14:37:45,971 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:37:45,972 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:37:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:37:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2018-01-23 14:37:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-23 14:37:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2018-01-23 14:37:45,978 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2018-01-23 14:37:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:45,979 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2018-01-23 14:37:45,979 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-23 14:37:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2018-01-23 14:37:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-23 14:37:45,981 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:45,981 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:45,982 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:45,982 INFO L82 PathProgramCache]: Analyzing trace with hash -335791331, now seen corresponding path program 1 times [2018-01-23 14:37:45,982 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:45,982 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:45,983 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:45,983 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:45,983 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:46,004 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:37:46,061 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:46,061 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:46,068 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:46,095 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:37:46,153 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:46,154 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-01-23 14:37:46,154 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:37:46,155 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:37:46,155 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:37:46,155 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2018-01-23 14:37:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:46,189 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2018-01-23 14:37:46,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:37:46,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2018-01-23 14:37:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:46,190 INFO L225 Difference]: With dead ends: 67 [2018-01-23 14:37:46,190 INFO L226 Difference]: Without dead ends: 55 [2018-01-23 14:37:46,190 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:37:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-23 14:37:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2018-01-23 14:37:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-23 14:37:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-01-23 14:37:46,196 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2018-01-23 14:37:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:46,196 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-01-23 14:37:46,196 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:37:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-01-23 14:37:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-23 14:37:46,197 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:46,198 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:46,198 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:46,198 INFO L82 PathProgramCache]: Analyzing trace with hash -291520001, now seen corresponding path program 2 times [2018-01-23 14:37:46,198 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:46,198 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:46,199 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:46,199 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:46,199 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:46,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-23 14:37:46,306 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:46,306 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:46,317 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:37:46,331 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:46,342 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:46,344 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:46,348 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-23 14:37:46,426 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-23 14:37:46,427 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2018-01-23 14:37:46,427 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-23 14:37:46,428 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-23 14:37:46,428 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:37:46,428 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2018-01-23 14:37:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:46,641 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2018-01-23 14:37:46,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:37:46,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2018-01-23 14:37:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:46,643 INFO L225 Difference]: With dead ends: 98 [2018-01-23 14:37:46,643 INFO L226 Difference]: Without dead ends: 62 [2018-01-23 14:37:46,644 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:37:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-23 14:37:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2018-01-23 14:37:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-23 14:37:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-01-23 14:37:46,652 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 52 [2018-01-23 14:37:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:46,653 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-01-23 14:37:46,653 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-23 14:37:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-01-23 14:37:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-01-23 14:37:46,656 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:46,656 INFO L322 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:46,656 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash -219458911, now seen corresponding path program 3 times [2018-01-23 14:37:46,657 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:46,657 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:46,658 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:46,658 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:46,658 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:46,684 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-01-23 14:37:46,754 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:46,754 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:46,760 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:37:46,775 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:46,780 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:46,784 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:46,785 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:46,789 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-01-23 14:37:46,843 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:46,843 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2018-01-23 14:37:46,844 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:37:46,844 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:37:46,844 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:37:46,844 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 10 states. [2018-01-23 14:37:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:47,033 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2018-01-23 14:37:47,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:37:47,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2018-01-23 14:37:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:47,037 INFO L225 Difference]: With dead ends: 127 [2018-01-23 14:37:47,037 INFO L226 Difference]: Without dead ends: 115 [2018-01-23 14:37:47,038 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:37:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-23 14:37:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 85. [2018-01-23 14:37:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-23 14:37:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-01-23 14:37:47,051 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 75 [2018-01-23 14:37:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:47,052 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-01-23 14:37:47,052 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:37:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-01-23 14:37:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-01-23 14:37:47,055 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:47,055 INFO L322 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:47,055 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash 383245375, now seen corresponding path program 4 times [2018-01-23 14:37:47,056 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:47,056 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:47,058 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:47,059 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:47,059 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:47,087 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2018-01-23 14:37:47,204 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:47,204 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:47,209 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:37:47,249 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:47,255 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 188 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-01-23 14:37:47,450 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:47,450 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2018-01-23 14:37:47,451 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:37:47,451 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:37:47,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:37:47,452 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 14 states. [2018-01-23 14:37:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:47,765 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2018-01-23 14:37:47,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:37:47,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 108 [2018-01-23 14:37:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:47,767 INFO L225 Difference]: With dead ends: 221 [2018-01-23 14:37:47,768 INFO L226 Difference]: Without dead ends: 163 [2018-01-23 14:37:47,769 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:37:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-01-23 14:37:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2018-01-23 14:37:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-01-23 14:37:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2018-01-23 14:37:47,785 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 108 [2018-01-23 14:37:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:47,786 INFO L432 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2018-01-23 14:37:47,786 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:37:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2018-01-23 14:37:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-01-23 14:37:47,789 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:47,790 INFO L322 BasicCegarLoop]: trace histogram [16, 11, 11, 11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:47,790 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1556430117, now seen corresponding path program 5 times [2018-01-23 14:37:47,790 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:47,790 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:47,791 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:47,792 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:47,792 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:47,825 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2018-01-23 14:37:48,011 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:48,012 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:48,024 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:37:48,048 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:48,052 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:48,056 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:48,062 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:48,071 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:48,072 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:48,079 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 215 proven. 18 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-01-23 14:37:48,199 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:48,199 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2018-01-23 14:37:48,200 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-23 14:37:48,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-23 14:37:48,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:37:48,200 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 15 states. [2018-01-23 14:37:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:48,546 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2018-01-23 14:37:48,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:37:48,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 141 [2018-01-23 14:37:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:48,547 INFO L225 Difference]: With dead ends: 194 [2018-01-23 14:37:48,547 INFO L226 Difference]: Without dead ends: 128 [2018-01-23 14:37:48,548 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:37:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-01-23 14:37:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2018-01-23 14:37:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-23 14:37:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2018-01-23 14:37:48,559 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 141 [2018-01-23 14:37:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:48,559 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2018-01-23 14:37:48,559 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-23 14:37:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2018-01-23 14:37:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-01-23 14:37:48,561 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:48,561 INFO L322 BasicCegarLoop]: trace histogram [21, 15, 15, 15, 15, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:48,561 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:48,562 INFO L82 PathProgramCache]: Analyzing trace with hash -776394745, now seen corresponding path program 6 times [2018-01-23 14:37:48,562 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:48,562 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:48,562 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:48,562 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:48,563 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:48,597 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2018-01-23 14:37:48,727 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:48,727 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:48,732 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:37:48,745 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:48,749 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:48,753 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:48,756 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:48,761 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:48,769 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:48,775 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:48,780 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:48,788 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:48,789 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:48,796 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2018-01-23 14:37:48,865 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:48,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-23 14:37:48,866 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:37:48,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:37:48,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:37:48,867 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 10 states. [2018-01-23 14:37:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:48,944 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2018-01-23 14:37:48,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:37:48,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 174 [2018-01-23 14:37:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:48,946 INFO L225 Difference]: With dead ends: 136 [2018-01-23 14:37:48,946 INFO L226 Difference]: Without dead ends: 124 [2018-01-23 14:37:48,947 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:37:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-01-23 14:37:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2018-01-23 14:37:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-23 14:37:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2018-01-23 14:37:48,957 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 174 [2018-01-23 14:37:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:48,958 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2018-01-23 14:37:48,958 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:37:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2018-01-23 14:37:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-01-23 14:37:48,960 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:48,960 INFO L322 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:48,961 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:48,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1363016457, now seen corresponding path program 7 times [2018-01-23 14:37:48,961 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:48,961 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:48,962 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:48,962 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:48,962 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:48,999 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-01-23 14:37:49,244 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:49,244 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:49,254 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:49,323 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 860 proven. 21 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2018-01-23 14:37:49,579 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:49,579 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2018-01-23 14:37:49,580 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-23 14:37:49,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-23 14:37:49,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:37:49,581 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 19 states. [2018-01-23 14:37:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:50,028 INFO L93 Difference]: Finished difference Result 283 states and 316 transitions. [2018-01-23 14:37:50,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:37:50,028 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 202 [2018-01-23 14:37:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:50,030 INFO L225 Difference]: With dead ends: 283 [2018-01-23 14:37:50,030 INFO L226 Difference]: Without dead ends: 217 [2018-01-23 14:37:50,031 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:37:50,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-01-23 14:37:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 152. [2018-01-23 14:37:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-01-23 14:37:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 167 transitions. [2018-01-23 14:37:50,045 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 167 transitions. Word has length 202 [2018-01-23 14:37:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:50,046 INFO L432 AbstractCegarLoop]: Abstraction has 152 states and 167 transitions. [2018-01-23 14:37:50,046 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-23 14:37:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 167 transitions. [2018-01-23 14:37:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-01-23 14:37:50,049 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:50,049 INFO L322 BasicCegarLoop]: trace histogram [34, 26, 26, 26, 26, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:50,049 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash 875312667, now seen corresponding path program 8 times [2018-01-23 14:37:50,049 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:50,049 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:50,050 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:50,050 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:50,050 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:50,090 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2421 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2018-01-23 14:37:50,242 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:50,242 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:50,246 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:37:50,265 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:50,294 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:50,307 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:50,313 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2421 backedges. 1579 proven. 38 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2018-01-23 14:37:50,516 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:50,523 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2018-01-23 14:37:50,523 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:37:50,524 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:37:50,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:37:50,524 INFO L87 Difference]: Start difference. First operand 152 states and 167 transitions. Second operand 22 states. [2018-01-23 14:37:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:50,890 INFO L93 Difference]: Finished difference Result 364 states and 406 transitions. [2018-01-23 14:37:50,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:37:50,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 255 [2018-01-23 14:37:50,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:50,892 INFO L225 Difference]: With dead ends: 364 [2018-01-23 14:37:50,893 INFO L226 Difference]: Without dead ends: 290 [2018-01-23 14:37:50,893 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:37:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-01-23 14:37:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 190. [2018-01-23 14:37:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-01-23 14:37:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 210 transitions. [2018-01-23 14:37:50,909 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 210 transitions. Word has length 255 [2018-01-23 14:37:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:50,910 INFO L432 AbstractCegarLoop]: Abstraction has 190 states and 210 transitions. [2018-01-23 14:37:50,910 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:37:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 210 transitions. [2018-01-23 14:37:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-01-23 14:37:50,913 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:50,913 INFO L322 BasicCegarLoop]: trace histogram [44, 35, 35, 35, 35, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:50,913 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1401085733, now seen corresponding path program 9 times [2018-01-23 14:37:50,913 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:50,913 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:50,914 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:50,914 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:50,915 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:50,956 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4091 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 3821 trivial. 0 not checked. [2018-01-23 14:37:51,287 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:51,287 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:51,292 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:37:51,315 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:51,318 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:51,322 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:51,328 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:51,335 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:51,342 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:51,348 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:51,349 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:51,356 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4091 backedges. 980 proven. 60 refuted. 0 times theorem prover too weak. 3051 trivial. 0 not checked. [2018-01-23 14:37:51,512 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:51,512 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2018-01-23 14:37:51,512 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-23 14:37:51,513 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-23 14:37:51,513 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:37:51,513 INFO L87 Difference]: Start difference. First operand 190 states and 210 transitions. Second operand 19 states. [2018-01-23 14:37:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:51,849 INFO L93 Difference]: Finished difference Result 454 states and 519 transitions. [2018-01-23 14:37:51,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:37:51,850 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 313 [2018-01-23 14:37:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:51,853 INFO L225 Difference]: With dead ends: 454 [2018-01-23 14:37:51,853 INFO L226 Difference]: Without dead ends: 442 [2018-01-23 14:37:51,854 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:37:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2018-01-23 14:37:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 241. [2018-01-23 14:37:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-01-23 14:37:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 273 transitions. [2018-01-23 14:37:51,877 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 273 transitions. Word has length 313 [2018-01-23 14:37:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:51,878 INFO L432 AbstractCegarLoop]: Abstraction has 241 states and 273 transitions. [2018-01-23 14:37:51,878 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-23 14:37:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 273 transitions. [2018-01-23 14:37:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-01-23 14:37:51,881 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:51,881 INFO L322 BasicCegarLoop]: trace histogram [55, 45, 45, 45, 45, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:51,882 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1776678017, now seen corresponding path program 10 times [2018-01-23 14:37:51,882 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:51,882 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:51,883 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:51,883 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:51,883 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:51,929 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6455 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 6120 trivial. 0 not checked. [2018-01-23 14:37:52,271 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:52,271 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:52,276 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:37:52,335 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:52,344 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6455 backedges. 4040 proven. 87 refuted. 0 times theorem prover too weak. 2328 trivial. 0 not checked. [2018-01-23 14:37:52,596 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:52,596 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2018-01-23 14:37:52,596 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:37:52,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:37:52,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:37:52,597 INFO L87 Difference]: Start difference. First operand 241 states and 273 transitions. Second operand 28 states. [2018-01-23 14:37:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:53,081 INFO L93 Difference]: Finished difference Result 613 states and 705 transitions. [2018-01-23 14:37:53,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-23 14:37:53,082 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 376 [2018-01-23 14:37:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:53,084 INFO L225 Difference]: With dead ends: 613 [2018-01-23 14:37:53,085 INFO L226 Difference]: Without dead ends: 509 [2018-01-23 14:37:53,086 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:37:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2018-01-23 14:37:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2018-01-23 14:37:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-01-23 14:37:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 324 transitions. [2018-01-23 14:37:53,105 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 324 transitions. Word has length 376 [2018-01-23 14:37:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:53,105 INFO L432 AbstractCegarLoop]: Abstraction has 289 states and 324 transitions. [2018-01-23 14:37:53,106 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:37:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 324 transitions. [2018-01-23 14:37:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-01-23 14:37:53,108 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:53,109 INFO L322 BasicCegarLoop]: trace histogram [66, 55, 55, 55, 55, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:53,109 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:53,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1714564055, now seen corresponding path program 11 times [2018-01-23 14:37:53,109 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:53,109 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:53,110 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:53,110 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:53,110 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:53,144 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9372 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 8965 trivial. 0 not checked. [2018-01-23 14:37:53,503 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:53,504 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:53,509 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:37:53,540 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:53,545 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:53,551 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:53,558 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:53,566 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:53,574 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:53,583 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:53,584 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:53,593 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9372 backedges. 5038 proven. 307 refuted. 0 times theorem prover too weak. 4027 trivial. 0 not checked. [2018-01-23 14:37:53,913 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:53,913 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2018-01-23 14:37:53,914 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-23 14:37:53,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-23 14:37:53,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:37:53,914 INFO L87 Difference]: Start difference. First operand 289 states and 324 transitions. Second operand 29 states. [2018-01-23 14:37:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:54,641 INFO L93 Difference]: Finished difference Result 654 states and 735 transitions. [2018-01-23 14:37:54,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-23 14:37:54,641 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 439 [2018-01-23 14:37:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:54,644 INFO L225 Difference]: With dead ends: 654 [2018-01-23 14:37:54,644 INFO L226 Difference]: Without dead ends: 352 [2018-01-23 14:37:54,646 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=490, Invalid=2590, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:37:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-01-23 14:37:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 288. [2018-01-23 14:37:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-01-23 14:37:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 315 transitions. [2018-01-23 14:37:54,672 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 315 transitions. Word has length 439 [2018-01-23 14:37:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:54,672 INFO L432 AbstractCegarLoop]: Abstraction has 288 states and 315 transitions. [2018-01-23 14:37:54,672 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-23 14:37:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 315 transitions. [2018-01-23 14:37:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-01-23 14:37:54,676 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:54,677 INFO L322 BasicCegarLoop]: trace histogram [75, 63, 63, 63, 63, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:54,677 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:54,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1807356171, now seen corresponding path program 12 times [2018-01-23 14:37:54,677 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:54,677 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:54,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:54,678 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:54,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:54,731 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12159 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 11673 trivial. 0 not checked. [2018-01-23 14:37:55,314 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:55,314 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:55,327 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:37:55,366 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,372 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,377 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,384 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,392 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,403 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,413 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,429 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,459 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,479 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,496 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,510 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,542 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,559 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,588 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,609 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:55,659 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:55,670 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12159 backedges. 2349 proven. 119 refuted. 0 times theorem prover too weak. 9691 trivial. 0 not checked. [2018-01-23 14:37:55,969 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:55,970 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2018-01-23 14:37:55,970 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:37:55,971 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:37:55,971 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:37:55,971 INFO L87 Difference]: Start difference. First operand 288 states and 315 transitions. Second operand 24 states. [2018-01-23 14:37:56,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:56,627 INFO L93 Difference]: Finished difference Result 647 states and 736 transitions. [2018-01-23 14:37:56,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-23 14:37:56,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 492 [2018-01-23 14:37:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:56,633 INFO L225 Difference]: With dead ends: 647 [2018-01-23 14:37:56,633 INFO L226 Difference]: Without dead ends: 635 [2018-01-23 14:37:56,634 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:37:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2018-01-23 14:37:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 349. [2018-01-23 14:37:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-01-23 14:37:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 390 transitions. [2018-01-23 14:37:56,670 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 390 transitions. Word has length 492 [2018-01-23 14:37:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:56,671 INFO L432 AbstractCegarLoop]: Abstraction has 349 states and 390 transitions. [2018-01-23 14:37:56,671 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:37:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 390 transitions. [2018-01-23 14:37:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-01-23 14:37:56,676 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:56,676 INFO L322 BasicCegarLoop]: trace histogram [89, 76, 76, 76, 76, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:56,676 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:56,677 INFO L82 PathProgramCache]: Analyzing trace with hash -71372863, now seen corresponding path program 13 times [2018-01-23 14:37:56,677 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:56,677 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:56,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:56,678 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:56,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:56,737 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17266 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 16694 trivial. 0 not checked. [2018-01-23 14:37:57,310 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:57,310 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:57,321 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:57,448 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17266 backedges. 10370 proven. 156 refuted. 0 times theorem prover too weak. 6740 trivial. 0 not checked. [2018-01-23 14:37:58,059 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:58,059 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 35 [2018-01-23 14:37:58,060 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-23 14:37:58,060 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-23 14:37:58,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:37:58,061 INFO L87 Difference]: Start difference. First operand 349 states and 390 transitions. Second operand 35 states. [2018-01-23 14:37:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:58,879 INFO L93 Difference]: Finished difference Result 817 states and 932 transitions. [2018-01-23 14:37:58,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-23 14:37:58,880 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 570 [2018-01-23 14:37:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:58,883 INFO L225 Difference]: With dead ends: 817 [2018-01-23 14:37:58,883 INFO L226 Difference]: Without dead ends: 693 [2018-01-23 14:37:58,885 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2018-01-23 14:37:58,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2018-01-23 14:37:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 407. [2018-01-23 14:37:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-01-23 14:37:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 451 transitions. [2018-01-23 14:37:58,909 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 451 transitions. Word has length 570 [2018-01-23 14:37:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:58,910 INFO L432 AbstractCegarLoop]: Abstraction has 407 states and 451 transitions. [2018-01-23 14:37:58,910 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-23 14:37:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 451 transitions. [2018-01-23 14:37:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2018-01-23 14:37:58,915 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:58,915 INFO L322 BasicCegarLoop]: trace histogram [103, 89, 89, 89, 89, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:58,915 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:58,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1198217585, now seen corresponding path program 14 times [2018-01-23 14:37:58,915 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:58,916 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:58,916 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:58,916 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:58,916 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:58,958 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 23283 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 22618 trivial. 0 not checked. [2018-01-23 14:37:59,607 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:59,607 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:59,615 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:37:59,654 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:59,741 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:59,754 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:59,762 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 23283 backedges. 12715 proven. 119 refuted. 0 times theorem prover too weak. 10449 trivial. 0 not checked. [2018-01-23 14:38:00,235 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:00,235 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2018-01-23 14:38:00,237 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:38:00,237 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:38:00,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:38:00,237 INFO L87 Difference]: Start difference. First operand 407 states and 451 transitions. Second operand 34 states. [2018-01-23 14:38:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:01,081 INFO L93 Difference]: Finished difference Result 732 states and 806 transitions. [2018-01-23 14:38:01,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-23 14:38:01,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 648 [2018-01-23 14:38:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:01,086 INFO L225 Difference]: With dead ends: 732 [2018-01-23 14:38:01,087 INFO L226 Difference]: Without dead ends: 600 [2018-01-23 14:38:01,089 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=567, Invalid=2513, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:38:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2018-01-23 14:38:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 406. [2018-01-23 14:38:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2018-01-23 14:38:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 449 transitions. [2018-01-23 14:38:01,128 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 449 transitions. Word has length 648 [2018-01-23 14:38:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:01,129 INFO L432 AbstractCegarLoop]: Abstraction has 406 states and 449 transitions. [2018-01-23 14:38:01,129 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:38:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 449 transitions. [2018-01-23 14:38:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-01-23 14:38:01,135 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:01,135 INFO L322 BasicCegarLoop]: trace histogram [114, 99, 99, 99, 99, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:01,136 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash 862237609, now seen corresponding path program 15 times [2018-01-23 14:38:01,136 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:01,136 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:01,137 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:01,137 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:01,137 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:01,205 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 28620 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 27855 trivial. 0 not checked. [2018-01-23 14:38:02,307 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:02,307 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:38:02,318 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:38:02,366 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,371 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,376 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,382 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,391 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,399 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,407 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,417 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,430 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,441 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,468 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:02,471 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:02,482 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 28620 backedges. 4638 proven. 198 refuted. 0 times theorem prover too weak. 23784 trivial. 0 not checked. [2018-01-23 14:38:03,052 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:03,053 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2018-01-23 14:38:03,054 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-23 14:38:03,054 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-23 14:38:03,054 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:38:03,054 INFO L87 Difference]: Start difference. First operand 406 states and 449 transitions. Second operand 29 states. [2018-01-23 14:38:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:03,541 INFO L93 Difference]: Finished difference Result 942 states and 1076 transitions. [2018-01-23 14:38:03,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-23 14:38:03,541 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 711 [2018-01-23 14:38:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:03,548 INFO L225 Difference]: With dead ends: 942 [2018-01-23 14:38:03,548 INFO L226 Difference]: Without dead ends: 930 [2018-01-23 14:38:03,550 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:38:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2018-01-23 14:38:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 477. [2018-01-23 14:38:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2018-01-23 14:38:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 537 transitions. [2018-01-23 14:38:03,602 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 537 transitions. Word has length 711 [2018-01-23 14:38:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:03,604 INFO L432 AbstractCegarLoop]: Abstraction has 477 states and 537 transitions. [2018-01-23 14:38:03,604 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-23 14:38:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 537 transitions. [2018-01-23 14:38:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2018-01-23 14:38:03,611 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:03,611 INFO L322 BasicCegarLoop]: trace histogram [131, 115, 115, 115, 115, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:03,611 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1064194881, now seen corresponding path program 16 times [2018-01-23 14:38:03,612 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:03,612 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:03,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:03,613 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:03,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:03,680 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 38047 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 37175 trivial. 0 not checked. [2018-01-23 14:38:04,998 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:04,998 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:38:05,004 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:38:05,137 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:05,150 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 38047 backedges. 22212 proven. 245 refuted. 0 times theorem prover too weak. 15590 trivial. 0 not checked. [2018-01-23 14:38:05,849 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:05,849 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2018-01-23 14:38:05,850 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-23 14:38:05,850 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-23 14:38:05,850 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1394, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:38:05,851 INFO L87 Difference]: Start difference. First operand 477 states and 537 transitions. Second operand 42 states. [2018-01-23 14:38:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:06,650 INFO L93 Difference]: Finished difference Result 1127 states and 1286 transitions. [2018-01-23 14:38:06,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-23 14:38:06,650 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 804 [2018-01-23 14:38:06,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:06,654 INFO L225 Difference]: With dead ends: 1127 [2018-01-23 14:38:06,654 INFO L226 Difference]: Without dead ends: 980 [2018-01-23 14:38:06,656 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=802, Invalid=3890, Unknown=0, NotChecked=0, Total=4692 [2018-01-23 14:38:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2018-01-23 14:38:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 545. [2018-01-23 14:38:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2018-01-23 14:38:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 609 transitions. [2018-01-23 14:38:06,690 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 609 transitions. Word has length 804 [2018-01-23 14:38:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:06,691 INFO L432 AbstractCegarLoop]: Abstraction has 545 states and 609 transitions. [2018-01-23 14:38:06,691 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-23 14:38:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 609 transitions. [2018-01-23 14:38:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2018-01-23 14:38:06,708 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:06,709 INFO L322 BasicCegarLoop]: trace histogram [148, 131, 131, 131, 131, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:06,709 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:06,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1030594861, now seen corresponding path program 17 times [2018-01-23 14:38:06,709 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:06,710 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:06,710 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:06,710 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:06,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:06,783 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 48831 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 47845 trivial. 0 not checked. [2018-01-23 14:38:07,915 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:07,915 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:38:07,920 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:38:07,957 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:07,958 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:07,962 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:07,968 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:07,974 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:07,983 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:07,994 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:08,007 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:08,027 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:08,048 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:08,067 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:08,097 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:08,119 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:08,123 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:08,135 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 48831 backedges. 26528 proven. 889 refuted. 0 times theorem prover too weak. 21414 trivial. 0 not checked. [2018-01-23 14:38:08,939 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:08,940 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2018-01-23 14:38:08,940 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-01-23 14:38:08,941 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-01-23 14:38:08,941 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:38:08,941 INFO L87 Difference]: Start difference. First operand 545 states and 609 transitions. Second operand 43 states. [2018-01-23 14:38:10,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:10,092 INFO L93 Difference]: Finished difference Result 939 states and 1042 transitions. [2018-01-23 14:38:10,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-01-23 14:38:10,092 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 897 [2018-01-23 14:38:10,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:10,095 INFO L225 Difference]: With dead ends: 939 [2018-01-23 14:38:10,095 INFO L226 Difference]: Without dead ends: 784 [2018-01-23 14:38:10,098 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1061, Invalid=5911, Unknown=0, NotChecked=0, Total=6972 [2018-01-23 14:38:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2018-01-23 14:38:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 544. [2018-01-23 14:38:10,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-01-23 14:38:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 607 transitions. [2018-01-23 14:38:10,153 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 607 transitions. Word has length 897 [2018-01-23 14:38:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:10,154 INFO L432 AbstractCegarLoop]: Abstraction has 544 states and 607 transitions. [2018-01-23 14:38:10,154 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-01-23 14:38:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 607 transitions. [2018-01-23 14:38:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2018-01-23 14:38:10,164 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:10,165 INFO L322 BasicCegarLoop]: trace histogram [161, 143, 143, 143, 143, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:10,165 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1035858959, now seen corresponding path program 18 times [2018-01-23 14:38:10,165 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:10,165 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:10,166 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:10,166 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:10,166 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:10,241 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 57938 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 56831 trivial. 0 not checked. [2018-01-23 14:38:11,666 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:11,666 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:38:11,671 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:38:11,712 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,715 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,717 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,719 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,722 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,725 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,729 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,733 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,742 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,748 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,756 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,767 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,777 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,792 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,798 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,809 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,821 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,842 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,852 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,879 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,907 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,937 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,964 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:11,991 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:12,045 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:38:12,049 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:12,059 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 57938 backedges. 8087 proven. 297 refuted. 0 times theorem prover too weak. 49554 trivial. 0 not checked. [2018-01-23 14:38:12,707 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:12,707 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 34 [2018-01-23 14:38:12,708 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:38:12,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:38:12,708 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=820, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:38:12,709 INFO L87 Difference]: Start difference. First operand 544 states and 607 transitions. Second operand 34 states. [2018-01-23 14:38:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:13,263 INFO L93 Difference]: Finished difference Result 1296 states and 1485 transitions. [2018-01-23 14:38:13,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-23 14:38:13,264 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 970 [2018-01-23 14:38:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:13,269 INFO L225 Difference]: With dead ends: 1296 [2018-01-23 14:38:13,269 INFO L226 Difference]: Without dead ends: 1284 [2018-01-23 14:38:13,271 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 958 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=482, Invalid=1588, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:38:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2018-01-23 14:38:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 625. [2018-01-23 14:38:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-01-23 14:38:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 708 transitions. [2018-01-23 14:38:13,312 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 708 transitions. Word has length 970 [2018-01-23 14:38:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:13,313 INFO L432 AbstractCegarLoop]: Abstraction has 625 states and 708 transitions. [2018-01-23 14:38:13,313 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:38:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 708 transitions. [2018-01-23 14:38:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2018-01-23 14:38:13,321 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:13,321 INFO L322 BasicCegarLoop]: trace histogram [181, 162, 162, 162, 162, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:13,321 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1745825279, now seen corresponding path program 19 times [2018-01-23 14:38:13,321 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:13,322 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:13,322 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:13,322 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:13,322 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:13,375 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 73622 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 72387 trivial. 0 not checked. [2018-01-23 14:38:15,001 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:15,001 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:38:15,007 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:15,181 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 73622 backedges. 42098 proven. 354 refuted. 0 times theorem prover too weak. 31170 trivial. 0 not checked. [2018-01-23 14:38:15,994 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:15,994 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 49 [2018-01-23 14:38:15,995 INFO L409 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-01-23 14:38:15,995 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-01-23 14:38:15,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1910, Unknown=0, NotChecked=0, Total=2352 [2018-01-23 14:38:15,996 INFO L87 Difference]: Start difference. First operand 625 states and 708 transitions. Second operand 49 states. [2018-01-23 14:38:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:16,970 INFO L93 Difference]: Finished difference Result 1489 states and 1700 transitions. [2018-01-23 14:38:17,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-01-23 14:38:17,002 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 1078 [2018-01-23 14:38:17,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:17,008 INFO L225 Difference]: With dead ends: 1489 [2018-01-23 14:38:17,009 INFO L226 Difference]: Without dead ends: 1319 [2018-01-23 14:38:17,012 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 1052 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1087, Invalid=5393, Unknown=0, NotChecked=0, Total=6480 [2018-01-23 14:38:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2018-01-23 14:38:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 703. [2018-01-23 14:38:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-01-23 14:38:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 791 transitions. [2018-01-23 14:38:17,094 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 791 transitions. Word has length 1078 [2018-01-23 14:38:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:17,095 INFO L432 AbstractCegarLoop]: Abstraction has 703 states and 791 transitions. [2018-01-23 14:38:17,095 INFO L433 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-01-23 14:38:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 791 transitions. [2018-01-23 14:38:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1187 [2018-01-23 14:38:17,110 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:17,111 INFO L322 BasicCegarLoop]: trace histogram [201, 181, 181, 181, 181, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:17,111 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:17,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1689447187, now seen corresponding path program 20 times [2018-01-23 14:38:17,112 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:17,112 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:17,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:17,113 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:38:17,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:17,207 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 91200 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 89830 trivial. 0 not checked. [2018-01-23 14:38:19,293 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:19,293 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:38:19,299 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:38:19,350 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:19,467 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:38:19,491 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:19,506 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 91200 backedges. 49529 proven. 297 refuted. 0 times theorem prover too weak. 41374 trivial. 0 not checked. [2018-01-23 14:38:20,309 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:20,310 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 48 [2018-01-23 14:38:20,310 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:38:20,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:38:20,311 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:38:20,311 INFO L87 Difference]: Start difference. First operand 703 states and 791 transitions. Second operand 48 states. [2018-01-23 14:38:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:21,369 INFO L93 Difference]: Finished difference Result 1358 states and 1512 transitions. [2018-01-23 14:38:21,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-01-23 14:38:21,369 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 1186 [2018-01-23 14:38:21,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:21,374 INFO L225 Difference]: With dead ends: 1358 [2018-01-23 14:38:21,374 INFO L226 Difference]: Without dead ends: 1180 [2018-01-23 14:38:21,377 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1162 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1096, Invalid=5224, Unknown=0, NotChecked=0, Total=6320 [2018-01-23 14:38:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2018-01-23 14:38:21,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 702. [2018-01-23 14:38:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2018-01-23 14:38:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 789 transitions. [2018-01-23 14:38:21,453 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 789 transitions. Word has length 1186 [2018-01-23 14:38:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:21,454 INFO L432 AbstractCegarLoop]: Abstraction has 702 states and 789 transitions. [2018-01-23 14:38:21,454 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:38:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 789 transitions. [2018-01-23 14:38:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1270 [2018-01-23 14:38:21,469 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:21,470 INFO L322 BasicCegarLoop]: trace histogram [216, 195, 195, 195, 195, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:21,470 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:21,471 INFO L82 PathProgramCache]: Analyzing trace with hash -675523539, now seen corresponding path program 21 times [2018-01-23 14:38:21,471 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:21,471 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:21,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:21,472 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:21,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:21,566 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:38:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 105537 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 104025 trivial. 0 not checked. [2018-01-23 14:38:23,952 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:38:23,952 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:38:23,958 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:38:24,013 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,016 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,022 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,027 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,033 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,040 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,045 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,052 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,058 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,069 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,081 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,112 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,131 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,172 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,208 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:38:24,212 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:38:24,223 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:38:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 105537 backedges. 12936 proven. 416 refuted. 0 times theorem prover too weak. 92185 trivial. 0 not checked. [2018-01-23 14:38:24,966 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:38:24,967 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 39 [2018-01-23 14:38:24,968 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-23 14:38:24,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-23 14:38:24,968 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:38:24,968 INFO L87 Difference]: Start difference. First operand 702 states and 789 transitions. Second operand 39 states. [2018-01-23 14:38:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:38:25,778 INFO L93 Difference]: Finished difference Result 1709 states and 1963 transitions. [2018-01-23 14:38:25,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-01-23 14:38:25,778 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 1269 [2018-01-23 14:38:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:38:25,785 INFO L225 Difference]: With dead ends: 1709 [2018-01-23 14:38:25,785 INFO L226 Difference]: Without dead ends: 1697 [2018-01-23 14:38:25,787 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1306 GetRequests, 1255 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=635, Invalid=2121, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:38:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2018-01-23 14:38:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 793. [2018-01-23 14:38:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2018-01-23 14:38:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 903 transitions. [2018-01-23 14:38:25,850 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 903 transitions. Word has length 1269 [2018-01-23 14:38:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:38:25,851 INFO L432 AbstractCegarLoop]: Abstraction has 793 states and 903 transitions. [2018-01-23 14:38:25,851 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-23 14:38:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 903 transitions. [2018-01-23 14:38:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1393 [2018-01-23 14:38:25,867 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:38:25,868 INFO L322 BasicCegarLoop]: trace histogram [239, 217, 217, 217, 217, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:38:25,868 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:38:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2090385407, now seen corresponding path program 22 times [2018-01-23 14:38:25,868 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:38:25,868 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:38:25,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:25,869 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:38:25,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:38:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:38:25,975 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-01-23 14:38:27,170 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:264) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:262) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:131) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:200) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:915) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:279) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackTraceAbstractionRefinementStrategy.getTraceCheck(MultiTrackTraceAbstractionRefinementStrategy.java:218) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:205) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:381) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:157) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:113) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:117) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-01-23 14:38:27,174 INFO L168 Benchmark]: Toolchain (without parser) took 42622.57 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 266.0 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 2.0 GB. Max. memory is 5.3 GB. [2018-01-23 14:38:27,175 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 306.7 MB. Free memory is still 271.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:38:27,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.65 ms. Allocated memory is still 306.7 MB. Free memory was 266.0 MB in the beginning and 256.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. [2018-01-23 14:38:27,175 INFO L168 Benchmark]: Boogie Preprocessor took 28.58 ms. Allocated memory is still 306.7 MB. Free memory was 256.9 MB in the beginning and 255.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-23 14:38:27,176 INFO L168 Benchmark]: RCFGBuilder took 240.68 ms. Allocated memory is still 306.7 MB. Free memory was 255.9 MB in the beginning and 240.1 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 5.3 GB. [2018-01-23 14:38:27,176 INFO L168 Benchmark]: TraceAbstraction took 42154.47 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 240.1 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.9 GB. Max. memory is 5.3 GB. [2018-01-23 14:38:27,178 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 306.7 MB. Free memory is still 271.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 190.65 ms. Allocated memory is still 306.7 MB. Free memory was 266.0 MB in the beginning and 256.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 28.58 ms. Allocated memory is still 306.7 MB. Free memory was 256.9 MB in the beginning and 255.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 240.68 ms. Allocated memory is still 306.7 MB. Free memory was 255.9 MB in the beginning and 240.1 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 42154.47 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 240.1 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.9 GB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 45 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:264) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-38-27-186.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-38-27-186.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-38-27-186.csv Completed graceful shutdown