java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:43:20,257 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:43:20,260 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:43:20,273 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:43:20,273 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:43:20,275 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:43:20,276 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:43:20,278 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:43:20,280 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:43:20,281 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:43:20,281 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:43:20,281 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:43:20,282 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:43:20,283 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:43:20,284 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:43:20,287 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:43:20,289 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:43:20,292 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:43:20,293 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:43:20,295 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:43:20,297 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 14:43:20,303 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:43:20,304 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:43:20,304 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 14:43:20,316 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:43:20,316 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:43:20,317 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:43:20,317 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:43:20,317 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:43:20,318 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:43:20,318 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:43:20,319 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:43:20,319 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:43:20,319 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:43:20,319 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:43:20,320 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:43:20,320 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:43:20,320 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:43:20,320 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:43:20,320 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:43:20,321 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:43:20,321 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:43:20,321 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:43:20,321 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:43:20,322 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:43:20,322 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:43:20,322 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:43:20,322 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:43:20,322 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:43:20,323 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:43:20,323 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:43:20,323 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:43:20,323 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:43:20,323 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:43:20,324 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:43:20,324 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:43:20,324 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:43:20,324 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:43:20,324 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:43:20,325 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:43:20,326 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:43:20,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:43:20,378 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:43:20,383 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:43:20,385 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:43:20,386 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:43:20,387 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c [2018-01-23 14:43:20,527 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:43:20,532 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:43:20,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:43:20,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:43:20,538 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:43:20,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:43:20" (1/1) ... [2018-01-23 14:43:20,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290110cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20, skipping insertion in model container [2018-01-23 14:43:20,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:43:20" (1/1) ... [2018-01-23 14:43:20,558 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:43:20,573 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:43:20,693 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:43:20,710 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:43:20,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20 WrapperNode [2018-01-23 14:43:20,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:43:20,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:43:20,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:43:20,718 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:43:20,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20" (1/1) ... [2018-01-23 14:43:20,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20" (1/1) ... [2018-01-23 14:43:20,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20" (1/1) ... [2018-01-23 14:43:20,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20" (1/1) ... [2018-01-23 14:43:20,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20" (1/1) ... [2018-01-23 14:43:20,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20" (1/1) ... [2018-01-23 14:43:20,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20" (1/1) ... [2018-01-23 14:43:20,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:43:20,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:43:20,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:43:20,750 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:43:20,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20" (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 14:43:20,799 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:43:20,800 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:43:20,800 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-23 14:43:20,800 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:43:20,800 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:43:20,800 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:43:20,800 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:43:20,801 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:43:20,801 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:43:20,801 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-23 14:43:20,801 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:43:20,801 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:43:20,801 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:43:20,965 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:43:20,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:43:20 BoogieIcfgContainer [2018-01-23 14:43:20,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:43:20,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:43:20,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:43:20,968 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:43:20,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:43:20" (1/3) ... [2018-01-23 14:43:20,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43351e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:43:20, skipping insertion in model container [2018-01-23 14:43:20,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:20" (2/3) ... [2018-01-23 14:43:20,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43351e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:43:20, skipping insertion in model container [2018-01-23 14:43:20,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:43:20" (3/3) ... [2018-01-23 14:43:20,972 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c [2018-01-23 14:43:20,979 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:43:20,986 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:43:21,031 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:43:21,032 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:43:21,032 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:43:21,032 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:43:21,032 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:43:21,032 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:43:21,032 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:43:21,032 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:43:21,033 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:43:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:43:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:43:21,056 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:21,056 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:43:21,057 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:43:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-23 14:43:21,065 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:21,066 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:21,114 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,114 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:21,114 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:43:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:43:21,178 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:43:21,185 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:43:21,191 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:43:21,191 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:43:21,191 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:43:21,191 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:43:21,191 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:43:21,191 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:43:21,192 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:43:21,192 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-23 14:43:21,192 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:43:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:43:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-23 14:43:21,194 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:21,194 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:21,195 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-23 14:43:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash 352444009, now seen corresponding path program 1 times [2018-01-23 14:43:21,195 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:21,195 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:21,196 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,196 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:21,197 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:21,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:21,255 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 14:43:21,257 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:43:21,258 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:43:21,259 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:43:21,269 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:43:21,270 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:43:21,272 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-23 14:43:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:21,292 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-23 14:43:21,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:43:21,294 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-23 14:43:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:21,303 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:43:21,303 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:43:21,307 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 14:43:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:43:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:43:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:43:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:43:21,411 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-23 14:43:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:21,412 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:43:21,412 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:43:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:43:21,412 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:43:21,415 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:43:21,415 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:43:21,415 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:43:21,416 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:43:21,416 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:43:21,416 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:43:21,416 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:43:21,416 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:43:21,416 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:43:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:43:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:43:21,420 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:21,420 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 14:43:21,420 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:21,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1481761889, now seen corresponding path program 1 times [2018-01-23 14:43:21,420 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:21,421 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:21,422 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,422 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:21,422 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:21,431 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:21,441 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 14:43:21,442 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:43:21,442 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:43:21,442 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:43:21,442 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:43:21,442 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:43:21,442 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-23 14:43:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:21,447 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-23 14:43:21,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:43:21,447 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-23 14:43:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:21,449 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:43:21,449 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:43:21,449 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 14:43:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:43:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:43:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:43:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-23 14:43:21,459 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2018-01-23 14:43:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:21,460 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-23 14:43:21,460 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:43:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-23 14:43:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:43:21,460 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:21,460 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 14:43:21,461 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash 499012364, now seen corresponding path program 1 times [2018-01-23 14:43:21,461 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:21,461 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:21,462 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,462 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:21,462 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:21,474 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:21,513 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 14:43:21,513 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:43:21,513 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:43:21,514 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:43:21,515 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:43:21,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:43:21,515 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2018-01-23 14:43:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:21,573 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-23 14:43:21,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:43:21,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-23 14:43:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:21,577 INFO L225 Difference]: With dead ends: 66 [2018-01-23 14:43:21,578 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:43:21,579 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 14:43:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:43:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-01-23 14:43:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:43:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-23 14:43:21,593 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 19 [2018-01-23 14:43:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:21,594 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-23 14:43:21,594 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:43:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-23 14:43:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:43:21,595 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:21,596 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:21,596 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:21,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1504830404, now seen corresponding path program 1 times [2018-01-23 14:43:21,596 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:21,596 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:21,597 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,598 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:21,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:21,618 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:21,759 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:21,759 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 14:43:21,778 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:21,818 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:21,904 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 14:43:21,936 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-23 14:43:21,937 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2018-01-23 14:43:21,937 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-23 14:43:21,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-23 14:43:21,938 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:43:21,938 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 11 states. [2018-01-23 14:43:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:22,272 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2018-01-23 14:43:22,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:43:22,273 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-01-23 14:43:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:22,274 INFO L225 Difference]: With dead ends: 90 [2018-01-23 14:43:22,275 INFO L226 Difference]: Without dead ends: 56 [2018-01-23 14:43:22,276 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:43:22,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-23 14:43:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2018-01-23 14:43:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-23 14:43:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-23 14:43:22,283 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 31 [2018-01-23 14:43:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:22,283 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-23 14:43:22,284 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-23 14:43:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-23 14:43:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:43:22,285 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:22,285 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] [2018-01-23 14:43:22,285 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:22,286 INFO L82 PathProgramCache]: Analyzing trace with hash -151955344, now seen corresponding path program 1 times [2018-01-23 14:43:22,286 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:22,286 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:22,287 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:22,288 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:22,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:22,304 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:22,346 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 14:43:22,346 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:22,347 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 14:43:22,356 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:22,390 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:22,428 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 14:43:22,448 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:22,448 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-01-23 14:43:22,449 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:43:22,449 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:43:22,449 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:43:22,449 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 5 states. [2018-01-23 14:43:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:22,487 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2018-01-23 14:43:22,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:43:22,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-23 14:43:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:22,488 INFO L225 Difference]: With dead ends: 84 [2018-01-23 14:43:22,489 INFO L226 Difference]: Without dead ends: 67 [2018-01-23 14:43:22,489 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 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 14:43:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-23 14:43:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 52. [2018-01-23 14:43:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-23 14:43:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-23 14:43:22,495 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 36 [2018-01-23 14:43:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:22,495 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-23 14:43:22,495 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:43:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-23 14:43:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-23 14:43:22,497 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:22,498 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:22,498 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:22,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1862415341, now seen corresponding path program 2 times [2018-01-23 14:43:22,498 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:22,498 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:22,499 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:22,500 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:22,500 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:22,522 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-01-23 14:43:22,580 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:22,580 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 14:43:22,589 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:22,601 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:22,616 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:22,618 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:22,622 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-23 14:43:22,702 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:22,702 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-01-23 14:43:22,703 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:43:22,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:43:22,703 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:43:22,703 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 10 states. [2018-01-23 14:43:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:22,964 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2018-01-23 14:43:22,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:43:22,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2018-01-23 14:43:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:22,967 INFO L225 Difference]: With dead ends: 148 [2018-01-23 14:43:22,967 INFO L226 Difference]: Without dead ends: 111 [2018-01-23 14:43:22,968 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:43:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-23 14:43:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2018-01-23 14:43:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-23 14:43:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2018-01-23 14:43:22,980 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 52 [2018-01-23 14:43:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:22,980 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2018-01-23 14:43:22,980 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:43:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2018-01-23 14:43:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-01-23 14:43:22,983 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:22,983 INFO L322 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:22,984 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:22,984 INFO L82 PathProgramCache]: Analyzing trace with hash 298957008, now seen corresponding path program 3 times [2018-01-23 14:43:22,984 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:22,984 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:22,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:22,985 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:22,986 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:23,010 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-23 14:43:23,081 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:23,082 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 14:43:23,089 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:23,100 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:23,104 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:23,109 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:23,114 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:23,115 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:23,120 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-01-23 14:43:23,183 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:23,183 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-01-23 14:43:23,183 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:43:23,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:43:23,184 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:43:23,184 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 10 states. [2018-01-23 14:43:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:23,393 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2018-01-23 14:43:23,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:43:23,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2018-01-23 14:43:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:23,395 INFO L225 Difference]: With dead ends: 194 [2018-01-23 14:43:23,396 INFO L226 Difference]: Without dead ends: 169 [2018-01-23 14:43:23,396 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:43:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-01-23 14:43:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 115. [2018-01-23 14:43:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-23 14:43:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2018-01-23 14:43:23,410 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 78 [2018-01-23 14:43:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:23,410 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2018-01-23 14:43:23,411 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:43:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2018-01-23 14:43:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-01-23 14:43:23,413 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:23,413 INFO L322 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:23,413 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:23,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1844537761, now seen corresponding path program 4 times [2018-01-23 14:43:23,414 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:23,414 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:23,415 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:23,415 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:23,415 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:23,442 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-23 14:43:23,576 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:23,576 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 14:43:23,587 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:23,631 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:23,637 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 173 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-01-23 14:43:23,800 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:23,800 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2018-01-23 14:43:23,800 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:43:23,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:43:23,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:43:23,801 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand 16 states. [2018-01-23 14:43:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:24,292 INFO L93 Difference]: Finished difference Result 311 states and 357 transitions. [2018-01-23 14:43:24,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:43:24,293 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2018-01-23 14:43:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:24,297 INFO L225 Difference]: With dead ends: 311 [2018-01-23 14:43:24,297 INFO L226 Difference]: Without dead ends: 241 [2018-01-23 14:43:24,299 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:43:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-01-23 14:43:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2018-01-23 14:43:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-23 14:43:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2018-01-23 14:43:24,320 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 109 [2018-01-23 14:43:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:24,321 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2018-01-23 14:43:24,321 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:43:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2018-01-23 14:43:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-01-23 14:43:24,324 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:24,325 INFO L322 BasicCegarLoop]: trace histogram [18, 13, 13, 13, 13, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:24,325 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1349347824, now seen corresponding path program 5 times [2018-01-23 14:43:24,325 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:24,325 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:24,326 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:24,326 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:24,326 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:24,356 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-01-23 14:43:24,448 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:24,448 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 14:43:24,457 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:24,471 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:24,472 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:24,474 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:24,477 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:24,494 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:24,510 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:24,511 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:24,518 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 392 proven. 49 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-01-23 14:43:24,642 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:24,642 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2018-01-23 14:43:24,642 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-23 14:43:24,642 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-23 14:43:24,643 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:43:24,643 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand 17 states. [2018-01-23 14:43:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:25,083 INFO L93 Difference]: Finished difference Result 336 states and 379 transitions. [2018-01-23 14:43:25,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:43:25,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 140 [2018-01-23 14:43:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:25,084 INFO L225 Difference]: With dead ends: 336 [2018-01-23 14:43:25,084 INFO L226 Difference]: Without dead ends: 197 [2018-01-23 14:43:25,085 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:43:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-01-23 14:43:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2018-01-23 14:43:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-01-23 14:43:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2018-01-23 14:43:25,098 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 140 [2018-01-23 14:43:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:25,098 INFO L432 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2018-01-23 14:43:25,098 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-23 14:43:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2018-01-23 14:43:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-01-23 14:43:25,100 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:25,100 INFO L322 BasicCegarLoop]: trace histogram [24, 18, 18, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:25,100 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1936414061, now seen corresponding path program 6 times [2018-01-23 14:43:25,101 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:25,101 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:25,101 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:25,101 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:25,101 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:25,132 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2018-01-23 14:43:25,317 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:25,317 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 14:43:25,332 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:25,351 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:25,356 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:25,360 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:25,362 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:25,367 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:25,371 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:25,387 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:25,391 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:25,397 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:25,399 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:25,404 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2018-01-23 14:43:25,471 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:25,472 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-23 14:43:25,472 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:43:25,472 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:43:25,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:43:25,473 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand 10 states. [2018-01-23 14:43:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:25,559 INFO L93 Difference]: Finished difference Result 237 states and 264 transitions. [2018-01-23 14:43:25,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:43:25,559 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 176 [2018-01-23 14:43:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:25,561 INFO L225 Difference]: With dead ends: 237 [2018-01-23 14:43:25,561 INFO L226 Difference]: Without dead ends: 200 [2018-01-23 14:43:25,561 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 176 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 14:43:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-01-23 14:43:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 160. [2018-01-23 14:43:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-01-23 14:43:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 177 transitions. [2018-01-23 14:43:25,573 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 177 transitions. Word has length 176 [2018-01-23 14:43:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:25,574 INFO L432 AbstractCegarLoop]: Abstraction has 160 states and 177 transitions. [2018-01-23 14:43:25,574 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:43:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 177 transitions. [2018-01-23 14:43:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-01-23 14:43:25,577 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:25,577 INFO L322 BasicCegarLoop]: trace histogram [29, 22, 22, 22, 22, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:25,577 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash -984621276, now seen corresponding path program 7 times [2018-01-23 14:43:25,577 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:25,577 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:25,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:25,578 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:25,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:25,608 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2018-01-23 14:43:25,762 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:25,763 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 14:43:25,780 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:25,841 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 1134 proven. 38 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2018-01-23 14:43:26,011 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:26,012 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2018-01-23 14:43:26,012 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-23 14:43:26,012 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-23 14:43:26,013 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:43:26,013 INFO L87 Difference]: Start difference. First operand 160 states and 177 transitions. Second operand 21 states. [2018-01-23 14:43:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:26,452 INFO L93 Difference]: Finished difference Result 392 states and 439 transitions. [2018-01-23 14:43:26,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-23 14:43:26,453 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 207 [2018-01-23 14:43:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:26,455 INFO L225 Difference]: With dead ends: 392 [2018-01-23 14:43:26,455 INFO L226 Difference]: Without dead ends: 305 [2018-01-23 14:43:26,456 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:43:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-01-23 14:43:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 200. [2018-01-23 14:43:26,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-01-23 14:43:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2018-01-23 14:43:26,472 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 207 [2018-01-23 14:43:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:26,472 INFO L432 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2018-01-23 14:43:26,472 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-23 14:43:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2018-01-23 14:43:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-01-23 14:43:26,474 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:26,475 INFO L322 BasicCegarLoop]: trace histogram [38, 30, 30, 30, 30, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:26,475 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:26,475 INFO L82 PathProgramCache]: Analyzing trace with hash 446009255, now seen corresponding path program 8 times [2018-01-23 14:43:26,475 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:26,475 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:26,476 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:26,476 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:26,476 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:26,503 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2018-01-23 14:43:26,749 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:26,749 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 14:43:26,760 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:26,784 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:26,818 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:26,823 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:26,828 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 1895 proven. 60 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2018-01-23 14:43:27,101 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:27,101 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2018-01-23 14:43:27,102 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:43:27,102 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:43:27,102 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:43:27,102 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 24 states. [2018-01-23 14:43:27,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:27,641 INFO L93 Difference]: Finished difference Result 489 states and 547 transitions. [2018-01-23 14:43:27,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:43:27,642 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 258 [2018-01-23 14:43:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:27,644 INFO L225 Difference]: With dead ends: 489 [2018-01-23 14:43:27,644 INFO L226 Difference]: Without dead ends: 390 [2018-01-23 14:43:27,646 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:43:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2018-01-23 14:43:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 245. [2018-01-23 14:43:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-01-23 14:43:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 273 transitions. [2018-01-23 14:43:27,667 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 273 transitions. Word has length 258 [2018-01-23 14:43:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:27,667 INFO L432 AbstractCegarLoop]: Abstraction has 245 states and 273 transitions. [2018-01-23 14:43:27,667 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:43:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 273 transitions. [2018-01-23 14:43:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-01-23 14:43:27,670 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:27,670 INFO L322 BasicCegarLoop]: trace histogram [48, 39, 39, 39, 39, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:27,671 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1567268592, now seen corresponding path program 9 times [2018-01-23 14:43:27,671 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:27,671 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:27,672 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:27,672 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:27,672 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:27,709 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4821 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 4623 trivial. 0 not checked. [2018-01-23 14:43:27,992 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:27,992 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 14:43:27,998 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:28,018 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:28,021 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:28,025 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:28,029 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:28,034 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:28,039 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:28,043 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:28,049 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:28,050 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:28,056 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4821 backedges. 1226 proven. 87 refuted. 0 times theorem prover too weak. 3508 trivial. 0 not checked. [2018-01-23 14:43:28,228 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:28,228 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-01-23 14:43:28,228 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:43:28,229 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:43:28,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:43:28,229 INFO L87 Difference]: Start difference. First operand 245 states and 273 transitions. Second operand 20 states. [2018-01-23 14:43:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:28,536 INFO L93 Difference]: Finished difference Result 564 states and 641 transitions. [2018-01-23 14:43:28,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:43:28,537 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 314 [2018-01-23 14:43:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:28,541 INFO L225 Difference]: With dead ends: 564 [2018-01-23 14:43:28,541 INFO L226 Difference]: Without dead ends: 515 [2018-01-23 14:43:28,542 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:43:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-01-23 14:43:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 303. [2018-01-23 14:43:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-01-23 14:43:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 343 transitions. [2018-01-23 14:43:28,569 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 343 transitions. Word has length 314 [2018-01-23 14:43:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:28,570 INFO L432 AbstractCegarLoop]: Abstraction has 303 states and 343 transitions. [2018-01-23 14:43:28,570 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:43:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 343 transitions. [2018-01-23 14:43:28,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-01-23 14:43:28,573 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:28,573 INFO L322 BasicCegarLoop]: trace histogram [59, 49, 49, 49, 49, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:28,573 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:28,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1827967461, now seen corresponding path program 10 times [2018-01-23 14:43:28,574 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:28,574 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:28,574 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:28,575 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:28,575 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:28,615 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7375 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 7130 trivial. 0 not checked. [2018-01-23 14:43:28,999 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:28,999 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 14:43:29,004 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:29,065 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:29,072 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7375 backedges. 4311 proven. 119 refuted. 0 times theorem prover too weak. 2945 trivial. 0 not checked. [2018-01-23 14:43:29,374 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:29,374 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2018-01-23 14:43:29,375 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-23 14:43:29,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-23 14:43:29,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:43:29,375 INFO L87 Difference]: Start difference. First operand 303 states and 343 transitions. Second operand 30 states. [2018-01-23 14:43:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:30,164 INFO L93 Difference]: Finished difference Result 751 states and 858 transitions. [2018-01-23 14:43:30,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-23 14:43:30,165 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 375 [2018-01-23 14:43:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:30,169 INFO L225 Difference]: With dead ends: 751 [2018-01-23 14:43:30,170 INFO L226 Difference]: Without dead ends: 618 [2018-01-23 14:43:30,171 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:43:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2018-01-23 14:43:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 358. [2018-01-23 14:43:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-01-23 14:43:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 403 transitions. [2018-01-23 14:43:30,202 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 403 transitions. Word has length 375 [2018-01-23 14:43:30,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:30,203 INFO L432 AbstractCegarLoop]: Abstraction has 358 states and 403 transitions. [2018-01-23 14:43:30,203 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-23 14:43:30,203 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 403 transitions. [2018-01-23 14:43:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-01-23 14:43:30,207 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:30,207 INFO L322 BasicCegarLoop]: trace histogram [70, 59, 59, 59, 59, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:30,207 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:30,207 INFO L82 PathProgramCache]: Analyzing trace with hash -940109232, now seen corresponding path program 11 times [2018-01-23 14:43:30,207 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:30,208 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:30,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:30,209 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:30,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:30,254 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 10183 trivial. 0 not checked. [2018-01-23 14:43:30,784 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:30,784 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 14:43:30,789 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:30,818 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:30,824 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:30,830 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:30,836 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:30,842 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:30,849 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:30,857 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:30,863 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:30,865 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:30,873 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 6200 proven. 517 refuted. 0 times theorem prover too weak. 3763 trivial. 0 not checked. [2018-01-23 14:43:31,429 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:31,429 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 31 [2018-01-23 14:43:31,429 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-23 14:43:31,430 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-23 14:43:31,430 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:43:31,430 INFO L87 Difference]: Start difference. First operand 358 states and 403 transitions. Second operand 31 states. [2018-01-23 14:43:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:33,030 INFO L93 Difference]: Finished difference Result 835 states and 939 transitions. [2018-01-23 14:43:33,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-23 14:43:33,030 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 436 [2018-01-23 14:43:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:33,033 INFO L225 Difference]: With dead ends: 835 [2018-01-23 14:43:33,033 INFO L226 Difference]: Without dead ends: 469 [2018-01-23 14:43:33,035 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=514, Invalid=3026, Unknown=0, NotChecked=0, Total=3540 [2018-01-23 14:43:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2018-01-23 14:43:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 364. [2018-01-23 14:43:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-01-23 14:43:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 400 transitions. [2018-01-23 14:43:33,056 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 400 transitions. Word has length 436 [2018-01-23 14:43:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:33,057 INFO L432 AbstractCegarLoop]: Abstraction has 364 states and 400 transitions. [2018-01-23 14:43:33,057 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-23 14:43:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 400 transitions. [2018-01-23 14:43:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-01-23 14:43:33,059 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:33,060 INFO L322 BasicCegarLoop]: trace histogram [80, 68, 68, 68, 68, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:33,060 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash 270709555, now seen corresponding path program 12 times [2018-01-23 14:43:33,060 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:33,060 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:33,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:33,061 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:33,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:33,102 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13772 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 13418 trivial. 0 not checked. [2018-01-23 14:43:33,780 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:33,780 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 14:43:33,789 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:33,830 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,836 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,841 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,848 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,855 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,865 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,873 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,885 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,897 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,910 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,925 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,940 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,954 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,969 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:33,989 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:34,004 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:34,020 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:34,043 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:34,064 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:34,067 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:34,078 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13772 backedges. 2797 proven. 156 refuted. 0 times theorem prover too weak. 10819 trivial. 0 not checked. [2018-01-23 14:43:34,393 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:34,393 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2018-01-23 14:43:34,394 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-23 14:43:34,394 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-23 14:43:34,395 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:43:34,395 INFO L87 Difference]: Start difference. First operand 364 states and 400 transitions. Second operand 25 states. [2018-01-23 14:43:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:35,141 INFO L93 Difference]: Finished difference Result 742 states and 838 transitions. [2018-01-23 14:43:35,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-23 14:43:35,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 492 [2018-01-23 14:43:35,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:35,147 INFO L225 Difference]: With dead ends: 742 [2018-01-23 14:43:35,148 INFO L226 Difference]: Without dead ends: 681 [2018-01-23 14:43:35,149 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:43:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2018-01-23 14:43:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 432. [2018-01-23 14:43:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2018-01-23 14:43:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 481 transitions. [2018-01-23 14:43:35,185 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 481 transitions. Word has length 492 [2018-01-23 14:43:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:35,186 INFO L432 AbstractCegarLoop]: Abstraction has 432 states and 481 transitions. [2018-01-23 14:43:35,186 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-23 14:43:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 481 transitions. [2018-01-23 14:43:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2018-01-23 14:43:35,191 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:35,191 INFO L322 BasicCegarLoop]: trace histogram [94, 81, 81, 81, 81, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:35,191 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:35,192 INFO L82 PathProgramCache]: Analyzing trace with hash -388857372, now seen corresponding path program 13 times [2018-01-23 14:43:35,192 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:35,192 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:35,193 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:35,193 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:35,193 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:35,249 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 19190 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 18774 trivial. 0 not checked. [2018-01-23 14:43:35,950 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:35,950 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 14:43:35,958 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:36,075 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 19190 backedges. 11045 proven. 198 refuted. 0 times theorem prover too weak. 7947 trivial. 0 not checked. [2018-01-23 14:43:36,595 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:36,595 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2018-01-23 14:43:36,596 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-23 14:43:36,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-23 14:43:36,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1079, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:43:36,597 INFO L87 Difference]: Start difference. First operand 432 states and 481 transitions. Second operand 37 states. [2018-01-23 14:43:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:37,637 INFO L93 Difference]: Finished difference Result 940 states and 1065 transitions. [2018-01-23 14:43:37,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-23 14:43:37,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 568 [2018-01-23 14:43:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:37,643 INFO L225 Difference]: With dead ends: 940 [2018-01-23 14:43:37,643 INFO L226 Difference]: Without dead ends: 780 [2018-01-23 14:43:37,646 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2018-01-23 14:43:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2018-01-23 14:43:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 497. [2018-01-23 14:43:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2018-01-23 14:43:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 550 transitions. [2018-01-23 14:43:37,689 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 550 transitions. Word has length 568 [2018-01-23 14:43:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:37,690 INFO L432 AbstractCegarLoop]: Abstraction has 497 states and 550 transitions. [2018-01-23 14:43:37,690 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-23 14:43:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 550 transitions. [2018-01-23 14:43:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2018-01-23 14:43:37,696 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:37,696 INFO L322 BasicCegarLoop]: trace histogram [108, 94, 94, 94, 94, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:37,697 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:37,697 INFO L82 PathProgramCache]: Analyzing trace with hash -272899373, now seen corresponding path program 14 times [2018-01-23 14:43:37,697 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:37,697 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:37,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,698 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:37,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:37,754 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25516 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 25033 trivial. 0 not checked. [2018-01-23 14:43:38,841 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:38,842 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 14:43:38,847 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:38,883 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:38,951 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:38,962 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:38,971 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25516 backedges. 14703 proven. 156 refuted. 0 times theorem prover too weak. 10657 trivial. 0 not checked. [2018-01-23 14:43:39,484 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:39,484 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2018-01-23 14:43:39,485 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:43:39,486 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:43:39,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:43:39,486 INFO L87 Difference]: Start difference. First operand 497 states and 550 transitions. Second operand 36 states. [2018-01-23 14:43:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:40,253 INFO L93 Difference]: Finished difference Result 891 states and 984 transitions. [2018-01-23 14:43:40,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-23 14:43:40,253 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 644 [2018-01-23 14:43:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:40,257 INFO L225 Difference]: With dead ends: 891 [2018-01-23 14:43:40,257 INFO L226 Difference]: Without dead ends: 719 [2018-01-23 14:43:40,260 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=607, Invalid=2815, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:43:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-01-23 14:43:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 498. [2018-01-23 14:43:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-01-23 14:43:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 551 transitions. [2018-01-23 14:43:40,302 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 551 transitions. Word has length 644 [2018-01-23 14:43:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:40,303 INFO L432 AbstractCegarLoop]: Abstraction has 498 states and 551 transitions. [2018-01-23 14:43:40,303 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:43:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 551 transitions. [2018-01-23 14:43:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 711 [2018-01-23 14:43:40,309 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:40,310 INFO L322 BasicCegarLoop]: trace histogram [120, 105, 105, 105, 105, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:40,310 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:40,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1379701776, now seen corresponding path program 15 times [2018-01-23 14:43:40,310 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:40,310 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:40,311 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:40,311 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:40,311 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:40,375 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 31080 trivial. 0 not checked. [2018-01-23 14:43:41,650 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:41,650 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 14:43:41,656 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:41,691 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,695 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,699 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,703 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,709 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,714 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,720 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,725 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,733 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,740 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,749 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,762 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,764 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:41,775 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 5348 proven. 245 refuted. 0 times theorem prover too weak. 26042 trivial. 0 not checked. [2018-01-23 14:43:42,176 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:42,176 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2018-01-23 14:43:42,177 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-23 14:43:42,177 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-23 14:43:42,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:43:42,178 INFO L87 Difference]: Start difference. First operand 498 states and 551 transitions. Second operand 30 states. [2018-01-23 14:43:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:42,727 INFO L93 Difference]: Finished difference Result 1047 states and 1188 transitions. [2018-01-23 14:43:42,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-23 14:43:42,728 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 710 [2018-01-23 14:43:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:42,733 INFO L225 Difference]: With dead ends: 1047 [2018-01-23 14:43:42,733 INFO L226 Difference]: Without dead ends: 974 [2018-01-23 14:43:42,734 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=1254, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:43:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2018-01-23 14:43:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 576. [2018-01-23 14:43:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2018-01-23 14:43:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 645 transitions. [2018-01-23 14:43:42,765 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 645 transitions. Word has length 710 [2018-01-23 14:43:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:42,767 INFO L432 AbstractCegarLoop]: Abstraction has 576 states and 645 transitions. [2018-01-23 14:43:42,767 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-23 14:43:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 645 transitions. [2018-01-23 14:43:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2018-01-23 14:43:42,772 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:42,772 INFO L322 BasicCegarLoop]: trace histogram [137, 121, 121, 121, 121, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:42,773 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:42,773 INFO L82 PathProgramCache]: Analyzing trace with hash -134932331, now seen corresponding path program 16 times [2018-01-23 14:43:42,773 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:42,773 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:42,774 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:42,774 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:42,774 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:42,821 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 41524 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 40892 trivial. 0 not checked. [2018-01-23 14:43:43,865 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:43,865 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 14:43:43,870 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:44,018 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:44,032 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 41524 backedges. 23545 proven. 297 refuted. 0 times theorem prover too weak. 17682 trivial. 0 not checked. [2018-01-23 14:43:44,844 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:44,844 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 44 [2018-01-23 14:43:44,845 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-23 14:43:44,845 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-23 14:43:44,845 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:43:44,846 INFO L87 Difference]: Start difference. First operand 576 states and 645 transitions. Second operand 44 states. [2018-01-23 14:43:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:45,923 INFO L93 Difference]: Finished difference Result 1273 states and 1444 transitions. [2018-01-23 14:43:45,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-01-23 14:43:45,923 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 801 [2018-01-23 14:43:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:45,927 INFO L225 Difference]: With dead ends: 1273 [2018-01-23 14:43:45,927 INFO L226 Difference]: Without dead ends: 1080 [2018-01-23 14:43:45,929 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=854, Invalid=4258, Unknown=0, NotChecked=0, Total=5112 [2018-01-23 14:43:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2018-01-23 14:43:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 651. [2018-01-23 14:43:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2018-01-23 14:43:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 725 transitions. [2018-01-23 14:43:45,963 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 725 transitions. Word has length 801 [2018-01-23 14:43:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:45,964 INFO L432 AbstractCegarLoop]: Abstraction has 651 states and 725 transitions. [2018-01-23 14:43:45,964 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-23 14:43:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 725 transitions. [2018-01-23 14:43:45,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2018-01-23 14:43:45,970 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:45,970 INFO L322 BasicCegarLoop]: trace histogram [154, 137, 137, 137, 137, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:45,971 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1235531344, now seen corresponding path program 17 times [2018-01-23 14:43:45,971 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:45,971 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:45,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:45,972 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:45,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:46,021 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 52768 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 52054 trivial. 0 not checked. [2018-01-23 14:43:47,227 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:47,227 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 14:43:47,232 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:47,266 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,267 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,268 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,270 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,273 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,274 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,275 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,277 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,279 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,281 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,283 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,287 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,298 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,305 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,315 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,326 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,340 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,354 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,369 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,386 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,405 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,425 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:47,428 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:47,437 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 52768 backedges. 29775 proven. 1348 refuted. 0 times theorem prover too weak. 21645 trivial. 0 not checked. [2018-01-23 14:43:48,234 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:48,234 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2018-01-23 14:43:48,235 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-01-23 14:43:48,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-01-23 14:43:48,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:43:48,235 INFO L87 Difference]: Start difference. First operand 651 states and 725 transitions. Second operand 45 states. [2018-01-23 14:43:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:49,696 INFO L93 Difference]: Finished difference Result 1537 states and 1710 transitions. [2018-01-23 14:43:49,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-01-23 14:43:49,696 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 892 [2018-01-23 14:43:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:49,699 INFO L225 Difference]: With dead ends: 1537 [2018-01-23 14:43:49,699 INFO L226 Difference]: Without dead ends: 923 [2018-01-23 14:43:49,704 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1113, Invalid=6543, Unknown=0, NotChecked=0, Total=7656 [2018-01-23 14:43:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2018-01-23 14:43:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 647. [2018-01-23 14:43:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2018-01-23 14:43:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 719 transitions. [2018-01-23 14:43:49,760 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 719 transitions. Word has length 892 [2018-01-23 14:43:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:49,761 INFO L432 AbstractCegarLoop]: Abstraction has 647 states and 719 transitions. [2018-01-23 14:43:49,761 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-01-23 14:43:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 719 transitions. [2018-01-23 14:43:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2018-01-23 14:43:49,771 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:49,771 INFO L322 BasicCegarLoop]: trace histogram [168, 150, 150, 150, 150, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:49,771 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:49,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1077084973, now seen corresponding path program 18 times [2018-01-23 14:43:49,772 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:49,772 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:49,773 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:49,773 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:49,773 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:49,846 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 62994 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 62193 trivial. 0 not checked. [2018-01-23 14:43:51,263 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:51,263 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 14:43:51,268 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:51,308 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,310 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,313 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,314 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,317 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,319 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,324 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,331 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,338 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,343 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,352 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,357 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,364 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,369 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,375 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,380 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,388 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,396 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,404 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,410 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,420 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,427 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,438 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,453 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,466 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,480 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,500 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,503 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:51,515 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 62994 backedges. 9119 proven. 354 refuted. 0 times theorem prover too weak. 53521 trivial. 0 not checked. [2018-01-23 14:43:52,236 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:52,237 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2018-01-23 14:43:52,238 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-23 14:43:52,238 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-23 14:43:52,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:43:52,238 INFO L87 Difference]: Start difference. First operand 647 states and 719 transitions. Second operand 35 states. [2018-01-23 14:43:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:52,881 INFO L93 Difference]: Finished difference Result 1401 states and 1595 transitions. [2018-01-23 14:43:52,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-23 14:43:52,881 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 968 [2018-01-23 14:43:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:52,886 INFO L225 Difference]: With dead ends: 1401 [2018-01-23 14:43:52,886 INFO L226 Difference]: Without dead ends: 1316 [2018-01-23 14:43:52,887 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 955 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1732, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:43:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2018-01-23 14:43:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 735. [2018-01-23 14:43:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-01-23 14:43:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 826 transitions. [2018-01-23 14:43:52,927 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 826 transitions. Word has length 968 [2018-01-23 14:43:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:52,927 INFO L432 AbstractCegarLoop]: Abstraction has 735 states and 826 transitions. [2018-01-23 14:43:52,927 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-23 14:43:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 826 transitions. [2018-01-23 14:43:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1075 [2018-01-23 14:43:52,933 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:52,934 INFO L322 BasicCegarLoop]: trace histogram [188, 169, 169, 169, 169, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:52,934 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash 758470174, now seen corresponding path program 19 times [2018-01-23 14:43:52,934 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:52,934 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:52,935 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:52,935 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:52,935 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:52,988 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 79321 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 78428 trivial. 0 not checked. [2018-01-23 14:43:54,671 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:54,671 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 14:43:54,676 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:54,855 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 79321 backedges. 44403 proven. 416 refuted. 0 times theorem prover too weak. 34502 trivial. 0 not checked. [2018-01-23 14:43:55,667 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:55,668 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 51 [2018-01-23 14:43:55,668 INFO L409 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-01-23 14:43:55,668 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-01-23 14:43:55,669 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=2078, Unknown=0, NotChecked=0, Total=2550 [2018-01-23 14:43:55,669 INFO L87 Difference]: Start difference. First operand 735 states and 826 transitions. Second operand 51 states. [2018-01-23 14:43:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:56,893 INFO L93 Difference]: Finished difference Result 1650 states and 1873 transitions. [2018-01-23 14:43:56,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-01-23 14:43:56,893 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 1074 [2018-01-23 14:43:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:56,898 INFO L225 Difference]: With dead ends: 1650 [2018-01-23 14:43:56,898 INFO L226 Difference]: Without dead ends: 1424 [2018-01-23 14:43:56,900 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1147, Invalid=5825, Unknown=0, NotChecked=0, Total=6972 [2018-01-23 14:43:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2018-01-23 14:43:56,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 820. [2018-01-23 14:43:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-01-23 14:43:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 917 transitions. [2018-01-23 14:43:56,947 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 917 transitions. Word has length 1074 [2018-01-23 14:43:56,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:56,948 INFO L432 AbstractCegarLoop]: Abstraction has 820 states and 917 transitions. [2018-01-23 14:43:56,948 INFO L433 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-01-23 14:43:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 917 transitions. [2018-01-23 14:43:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1181 [2018-01-23 14:43:56,957 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:56,958 INFO L322 BasicCegarLoop]: trace histogram [208, 188, 188, 188, 188, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:56,958 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2082254899, now seen corresponding path program 20 times [2018-01-23 14:43:56,958 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:56,958 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:56,959 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:56,959 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:56,959 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:57,018 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 97540 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 96550 trivial. 0 not checked. [2018-01-23 14:43:58,982 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:58,982 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 14:43:58,987 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:59,035 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:59,141 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:59,162 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:59,172 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 97540 backedges. 54495 proven. 354 refuted. 0 times theorem prover too weak. 42691 trivial. 0 not checked. [2018-01-23 14:44:00,044 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:00,044 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2018-01-23 14:44:00,045 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-23 14:44:00,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-23 14:44:00,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=1986, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:44:00,046 INFO L87 Difference]: Start difference. First operand 820 states and 917 transitions. Second operand 50 states. [2018-01-23 14:44:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:01,413 INFO L93 Difference]: Finished difference Result 1559 states and 1734 transitions. [2018-01-23 14:44:01,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-01-23 14:44:01,413 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 1180 [2018-01-23 14:44:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:01,417 INFO L225 Difference]: With dead ends: 1559 [2018-01-23 14:44:01,417 INFO L226 Difference]: Without dead ends: 1321 [2018-01-23 14:44:01,419 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1235 GetRequests, 1154 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1152, Invalid=5654, Unknown=0, NotChecked=0, Total=6806 [2018-01-23 14:44:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2018-01-23 14:44:01,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 821. [2018-01-23 14:44:01,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2018-01-23 14:44:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 918 transitions. [2018-01-23 14:44:01,494 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 918 transitions. Word has length 1180 [2018-01-23 14:44:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:01,494 INFO L432 AbstractCegarLoop]: Abstraction has 821 states and 918 transitions. [2018-01-23 14:44:01,495 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-23 14:44:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 918 transitions. [2018-01-23 14:44:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2018-01-23 14:44:01,508 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:01,509 INFO L322 BasicCegarLoop]: trace histogram [224, 203, 203, 203, 203, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:01,509 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1794402256, now seen corresponding path program 21 times [2018-01-23 14:44:01,509 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:01,510 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:01,510 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:01,510 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:01,510 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:01,596 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 14:44:01,998 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 14:44:02,000 INFO L168 Benchmark]: Toolchain (without parser) took 41472.43 ms. Allocated memory was 303.6 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 262.9 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.8 GB. Max. memory is 5.3 GB. [2018-01-23 14:44:02,001 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 303.6 MB. Free memory is still 266.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:44:02,001 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.89 ms. Allocated memory is still 303.6 MB. Free memory was 260.8 MB in the beginning and 252.9 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:02,002 INFO L168 Benchmark]: Boogie Preprocessor took 31.19 ms. Allocated memory is still 303.6 MB. Free memory was 252.9 MB in the beginning and 250.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:02,002 INFO L168 Benchmark]: RCFGBuilder took 216.06 ms. Allocated memory is still 303.6 MB. Free memory was 250.9 MB in the beginning and 236.3 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:02,002 INFO L168 Benchmark]: TraceAbstraction took 41033.52 ms. Allocated memory was 303.6 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 236.3 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.8 GB. Max. memory is 5.3 GB. [2018-01-23 14:44:02,004 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 303.6 MB. Free memory is still 266.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 184.89 ms. Allocated memory is still 303.6 MB. Free memory was 260.8 MB in the beginning and 252.9 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 31.19 ms. Allocated memory is still 303.6 MB. Free memory was 252.9 MB in the beginning and 250.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 216.06 ms. Allocated memory is still 303.6 MB. Free memory was 250.9 MB in the beginning and 236.3 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 41033.52 ms. Allocated memory was 303.6 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 236.3 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.8 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, 41 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 14]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - 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/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-44-02-012.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-44-02-012.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-44-02-012.csv Completed graceful shutdown