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/reducercommutativity/sep20_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d63d1fb [2018-01-27 23:05:45,764 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-27 23:05:45,766 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-27 23:05:45,788 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-27 23:05:45,788 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-27 23:05:45,789 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-27 23:05:45,790 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-27 23:05:45,794 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-27 23:05:45,796 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-27 23:05:45,797 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-27 23:05:45,799 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-27 23:05:45,799 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-27 23:05:45,800 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-27 23:05:45,801 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-27 23:05:45,811 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-27 23:05:45,813 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-27 23:05:45,815 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-27 23:05:45,819 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-27 23:05:45,820 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-27 23:05:45,821 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-27 23:05:45,825 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-27 23:05:45,825 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-27 23:05:45,825 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-27 23:05:45,826 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-27 23:05:45,827 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-27 23:05:45,830 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-27 23:05:45,831 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-27 23:05:45,831 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-27 23:05:45,831 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-27 23:05:45,831 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-27 23:05:45,832 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-27 23:05:45,832 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 [2018-01-27 23:05:45,846 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-27 23:05:45,846 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-27 23:05:45,847 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-27 23:05:45,847 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-27 23:05:45,848 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-27 23:05:45,849 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-27 23:05:45,849 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-27 23:05:45,849 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-27 23:05:45,850 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-27 23:05:45,850 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-27 23:05:45,850 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-27 23:05:45,850 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-27 23:05:45,850 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-27 23:05:45,851 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-27 23:05:45,851 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-27 23:05:45,851 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-27 23:05:45,851 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-27 23:05:45,851 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-27 23:05:45,851 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-27 23:05:45,852 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-27 23:05:45,852 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-27 23:05:45,853 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-27 23:05:45,853 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-27 23:05:45,853 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-27 23:05:45,854 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-27 23:05:45,854 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-27 23:05:45,854 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-27 23:05:45,854 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-27 23:05:45,854 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-27 23:05:45,854 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-27 23:05:45,855 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-27 23:05:45,855 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-27 23:05:45,855 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-27 23:05:45,855 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-27 23:05:45,855 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-27 23:05:45,857 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-27 23:05:45,857 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-27 23:05:45,909 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-27 23:05:45,922 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-27 23:05:45,926 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-27 23:05:45,928 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-27 23:05:45,928 INFO L276 PluginConnector]: CDTParser initialized [2018-01-27 23:05:45,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep20_true-unreach-call.i [2018-01-27 23:05:46,067 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-27 23:05:46,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-27 23:05:46,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-27 23:05:46,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-27 23:05:46,086 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-27 23:05:46,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:05:46" (1/1) ... [2018-01-27 23:05:46,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38509d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46, skipping insertion in model container [2018-01-27 23:05:46,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:05:46" (1/1) ... [2018-01-27 23:05:46,110 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 23:05:46,131 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 23:05:46,296 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 23:05:46,320 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 23:05:46,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46 WrapperNode [2018-01-27 23:05:46,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-27 23:05:46,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-27 23:05:46,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-27 23:05:46,334 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-27 23:05:46,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46" (1/1) ... [2018-01-27 23:05:46,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46" (1/1) ... [2018-01-27 23:05:46,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46" (1/1) ... [2018-01-27 23:05:46,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46" (1/1) ... [2018-01-27 23:05:46,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46" (1/1) ... [2018-01-27 23:05:46,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46" (1/1) ... [2018-01-27 23:05:46,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46" (1/1) ... [2018-01-27 23:05:46,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-27 23:05:46,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-27 23:05:46,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-27 23:05:46,387 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-27 23:05:46,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46" (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 [2018-01-27 23:05:46,457 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-27 23:05:46,458 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-27 23:05:46,458 INFO L136 BoogieDeclarations]: Found implementation of procedure sep [2018-01-27 23:05:46,460 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-27 23:05:46,461 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-27 23:05:46,461 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-27 23:05:46,461 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-27 23:05:46,461 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-27 23:05:46,461 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-27 23:05:46,461 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-27 23:05:46,461 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-27 23:05:46,462 INFO L128 BoogieDeclarations]: Found specification of procedure sep [2018-01-27 23:05:46,462 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-27 23:05:46,462 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-27 23:05:46,462 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-27 23:05:47,017 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-27 23:05:47,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:05:47 BoogieIcfgContainer [2018-01-27 23:05:47,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-27 23:05:47,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-27 23:05:47,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-27 23:05:47,025 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-27 23:05:47,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:05:46" (1/3) ... [2018-01-27 23:05:47,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7a9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:05:47, skipping insertion in model container [2018-01-27 23:05:47,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:05:46" (2/3) ... [2018-01-27 23:05:47,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7a9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:05:47, skipping insertion in model container [2018-01-27 23:05:47,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:05:47" (3/3) ... [2018-01-27 23:05:47,029 INFO L105 eAbstractionObserver]: Analyzing ICFG sep20_true-unreach-call.i [2018-01-27 23:05:47,038 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-27 23:05:47,047 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-27 23:05:47,099 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:05:47,099 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:05:47,099 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:05:47,099 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:05:47,099 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:05:47,099 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:05:47,100 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:05:47,100 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-27 23:05:47,100 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:05:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:05:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-27 23:05:47,123 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:47,124 INFO L330 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-27 23:05:47,124 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-27 23:05:47,128 INFO L82 PathProgramCache]: Analyzing trace with hash 118205, now seen corresponding path program 1 times [2018-01-27 23:05:47,130 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:47,130 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:47,174 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:47,174 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:47,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-27 23:05:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-27 23:05:47,242 INFO L389 BasicCegarLoop]: Counterexample might be feasible [2018-01-27 23:05:47,254 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-27 23:05:47,265 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:05:47,266 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:05:47,266 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:05:47,266 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:05:47,266 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:05:47,266 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:05:47,266 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:05:47,266 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-27 23:05:47,266 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:05:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:05:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-27 23:05:47,273 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:47,273 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:47,273 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:47,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1534485562, now seen corresponding path program 1 times [2018-01-27 23:05:47,273 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:47,274 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:47,275 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:47,275 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:47,280 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:47,316 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-01-27 23:05:47,405 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:05:47,405 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-27 23:05:47,407 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-27 23:05:47,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-27 23:05:47,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-27 23:05:47,425 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-01-27 23:05:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:47,458 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2018-01-27 23:05:47,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-27 23:05:47,460 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2018-01-27 23:05:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:47,476 INFO L225 Difference]: With dead ends: 94 [2018-01-27 23:05:47,477 INFO L226 Difference]: Without dead ends: 50 [2018-01-27 23:05:47,480 INFO L533 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 [2018-01-27 23:05:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-27 23:05:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-27 23:05:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-27 23:05:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2018-01-27 23:05:47,633 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2018-01-27 23:05:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:47,634 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2018-01-27 23:05:47,634 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-27 23:05:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2018-01-27 23:05:47,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-27 23:05:47,637 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:47,637 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:47,638 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:47,638 INFO L82 PathProgramCache]: Analyzing trace with hash -156806073, now seen corresponding path program 1 times [2018-01-27 23:05:47,638 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:47,638 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:47,640 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:47,640 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:47,640 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:47,664 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-01-27 23:05:47,743 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:05:47,743 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-27 23:05:47,745 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-27 23:05:47,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-27 23:05:47,745 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:05:47,746 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 3 states. [2018-01-27 23:05:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:47,818 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2018-01-27 23:05:47,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:05:47,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2018-01-27 23:05:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:47,823 INFO L225 Difference]: With dead ends: 93 [2018-01-27 23:05:47,823 INFO L226 Difference]: Without dead ends: 55 [2018-01-27 23:05:47,824 INFO L533 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 [2018-01-27 23:05:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-27 23:05:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2018-01-27 23:05:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-27 23:05:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-27 23:05:47,839 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 51 [2018-01-27 23:05:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:47,839 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-27 23:05:47,840 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-27 23:05:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-27 23:05:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-27 23:05:47,843 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:47,843 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:47,843 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash 977157338, now seen corresponding path program 1 times [2018-01-27 23:05:47,844 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:47,844 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:47,847 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:47,847 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:47,847 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:47,889 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-27 23:05:47,992 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:47,992 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 [2018-01-27 23:05:48,012 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:48,097 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-01-27 23:05:48,158 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-27 23:05:48,159 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-01-27 23:05:48,159 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-27 23:05:48,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-27 23:05:48,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-27 23:05:48,160 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 4 states. [2018-01-27 23:05:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:48,205 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2018-01-27 23:05:48,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:05:48,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-01-27 23:05:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:48,208 INFO L225 Difference]: With dead ends: 94 [2018-01-27 23:05:48,208 INFO L226 Difference]: Without dead ends: 57 [2018-01-27 23:05:48,211 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-27 23:05:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-27 23:05:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2018-01-27 23:05:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-27 23:05:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-27 23:05:48,220 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 56 [2018-01-27 23:05:48,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:48,220 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-27 23:05:48,221 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-27 23:05:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-27 23:05:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-27 23:05:48,225 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:48,225 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:48,225 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:48,226 INFO L82 PathProgramCache]: Analyzing trace with hash 901586011, now seen corresponding path program 1 times [2018-01-27 23:05:48,226 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:48,226 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:48,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:48,230 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:48,231 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:48,275 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:05:48,386 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:05:48,386 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-27 23:05:48,387 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-27 23:05:48,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-27 23:05:48,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:05:48,388 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 3 states. [2018-01-27 23:05:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:48,433 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2018-01-27 23:05:48,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:05:48,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2018-01-27 23:05:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:48,435 INFO L225 Difference]: With dead ends: 82 [2018-01-27 23:05:48,435 INFO L226 Difference]: Without dead ends: 60 [2018-01-27 23:05:48,436 INFO L533 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 [2018-01-27 23:05:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-27 23:05:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-01-27 23:05:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-27 23:05:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-01-27 23:05:48,444 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 71 [2018-01-27 23:05:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:48,446 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-01-27 23:05:48,446 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-27 23:05:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-01-27 23:05:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-27 23:05:48,447 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:48,448 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:48,448 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash -61334317, now seen corresponding path program 1 times [2018-01-27 23:05:48,448 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:48,448 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:48,450 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:48,450 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:48,450 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:48,513 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:05:48,666 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:48,667 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) [2018-01-27 23:05:48,681 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:05:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:48,762 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:05:48,838 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:48,838 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-01-27 23:05:48,839 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-27 23:05:48,839 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-27 23:05:48,839 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-27 23:05:48,839 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 5 states. [2018-01-27 23:05:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:48,879 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2018-01-27 23:05:48,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-27 23:05:48,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2018-01-27 23:05:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:48,881 INFO L225 Difference]: With dead ends: 106 [2018-01-27 23:05:48,881 INFO L226 Difference]: Without dead ends: 64 [2018-01-27 23:05:48,882 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-27 23:05:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-27 23:05:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2018-01-27 23:05:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-27 23:05:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2018-01-27 23:05:48,891 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 77 [2018-01-27 23:05:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:48,891 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2018-01-27 23:05:48,891 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-27 23:05:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2018-01-27 23:05:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-27 23:05:48,893 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:48,893 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:48,893 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:48,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1322671194, now seen corresponding path program 2 times [2018-01-27 23:05:48,894 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:48,894 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:48,895 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:48,895 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:48,895 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:48,944 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:05:49,088 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:49,088 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 [2018-01-27 23:05:49,111 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:05:49,137 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:49,167 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:49,180 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:49,185 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:05:49,345 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:49,345 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-27 23:05:49,346 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-27 23:05:49,346 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-27 23:05:49,346 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-27 23:05:49,347 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 6 states. [2018-01-27 23:05:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:49,602 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2018-01-27 23:05:49,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-27 23:05:49,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2018-01-27 23:05:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:49,604 INFO L225 Difference]: With dead ends: 111 [2018-01-27 23:05:49,605 INFO L226 Difference]: Without dead ends: 69 [2018-01-27 23:05:49,605 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-27 23:05:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-27 23:05:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-01-27 23:05:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-27 23:05:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2018-01-27 23:05:49,617 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 82 [2018-01-27 23:05:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:49,618 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2018-01-27 23:05:49,618 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-27 23:05:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2018-01-27 23:05:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-27 23:05:49,624 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:49,624 INFO L330 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:49,625 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1751804083, now seen corresponding path program 3 times [2018-01-27 23:05:49,625 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:49,625 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:49,626 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:49,626 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:49,626 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:49,682 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:05:49,883 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:49,883 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 [2018-01-27 23:05:49,888 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:05:49,914 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:05:49,934 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:05:49,950 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:49,955 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-01-27 23:05:50,230 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:50,230 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-01-27 23:05:50,231 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-27 23:05:50,231 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-27 23:05:50,231 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:05:50,231 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 8 states. [2018-01-27 23:05:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:50,321 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2018-01-27 23:05:50,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-27 23:05:50,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2018-01-27 23:05:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:50,326 INFO L225 Difference]: With dead ends: 124 [2018-01-27 23:05:50,326 INFO L226 Difference]: Without dead ends: 82 [2018-01-27 23:05:50,327 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:05:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-27 23:05:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2018-01-27 23:05:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-27 23:05:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2018-01-27 23:05:50,341 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 87 [2018-01-27 23:05:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:50,342 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2018-01-27 23:05:50,342 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-27 23:05:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2018-01-27 23:05:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-01-27 23:05:50,344 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:50,344 INFO L330 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:50,344 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:50,344 INFO L82 PathProgramCache]: Analyzing trace with hash -465935121, now seen corresponding path program 4 times [2018-01-27 23:05:50,345 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:50,345 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:50,345 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:50,346 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:50,346 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:50,378 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:05:50,786 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:50,786 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 [2018-01-27 23:05:50,795 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:05:50,854 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:50,861 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:05:51,029 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:51,029 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-01-27 23:05:51,030 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-27 23:05:51,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-27 23:05:51,030 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:05:51,030 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 8 states. [2018-01-27 23:05:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:51,392 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2018-01-27 23:05:51,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-27 23:05:51,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2018-01-27 23:05:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:51,393 INFO L225 Difference]: With dead ends: 131 [2018-01-27 23:05:51,394 INFO L226 Difference]: Without dead ends: 84 [2018-01-27 23:05:51,394 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:05:51,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-27 23:05:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2018-01-27 23:05:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-27 23:05:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2018-01-27 23:05:51,403 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 107 [2018-01-27 23:05:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:51,403 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2018-01-27 23:05:51,403 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-27 23:05:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2018-01-27 23:05:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-01-27 23:05:51,406 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:51,406 INFO L330 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:51,406 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash 704280706, now seen corresponding path program 5 times [2018-01-27 23:05:51,407 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:51,407 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:51,408 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:51,408 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:51,408 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:51,446 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:05:51,661 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:51,661 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 [2018-01-27 23:05:51,666 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:05:51,681 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:51,685 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:51,696 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:51,711 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:51,724 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:51,734 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:51,738 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 62 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-01-27 23:05:51,804 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:51,804 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-01-27 23:05:51,805 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:05:51,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:05:51,805 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:05:51,806 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 11 states. [2018-01-27 23:05:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:52,132 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2018-01-27 23:05:52,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:05:52,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 112 [2018-01-27 23:05:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:52,134 INFO L225 Difference]: With dead ends: 144 [2018-01-27 23:05:52,134 INFO L226 Difference]: Without dead ends: 97 [2018-01-27 23:05:52,135 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:05:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-27 23:05:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2018-01-27 23:05:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-27 23:05:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2018-01-27 23:05:52,143 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 112 [2018-01-27 23:05:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:52,144 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2018-01-27 23:05:52,144 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:05:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2018-01-27 23:05:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-01-27 23:05:52,145 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:52,146 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 7, 6, 6, 6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:52,146 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash -942204730, now seen corresponding path program 6 times [2018-01-27 23:05:52,146 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:52,146 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:52,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:52,147 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:52,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:52,178 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-01-27 23:05:52,517 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:52,518 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 [2018-01-27 23:05:52,525 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:05:52,543 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:52,546 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:52,551 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:52,559 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:52,571 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:52,573 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:52,576 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-01-27 23:05:52,656 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:52,656 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2018-01-27 23:05:52,656 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:05:52,657 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:05:52,657 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:05:52,657 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 11 states. [2018-01-27 23:05:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:52,764 INFO L93 Difference]: Finished difference Result 161 states and 176 transitions. [2018-01-27 23:05:52,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:05:52,764 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2018-01-27 23:05:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:52,765 INFO L225 Difference]: With dead ends: 161 [2018-01-27 23:05:52,765 INFO L226 Difference]: Without dead ends: 109 [2018-01-27 23:05:52,766 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:05:52,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-27 23:05:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2018-01-27 23:05:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-01-27 23:05:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2018-01-27 23:05:52,775 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 132 [2018-01-27 23:05:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:52,775 INFO L432 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2018-01-27 23:05:52,775 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:05:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2018-01-27 23:05:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-01-27 23:05:52,777 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:52,777 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:52,777 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:52,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1709902091, now seen corresponding path program 7 times [2018-01-27 23:05:52,778 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:52,778 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:52,779 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:52,779 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:52,779 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:52,808 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:05:52,977 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:52,977 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 [2018-01-27 23:05:52,983 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:53,037 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:05:53,095 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:53,095 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-27 23:05:53,096 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:05:53,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:05:53,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:05:53,096 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 11 states. [2018-01-27 23:05:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:53,136 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2018-01-27 23:05:53,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-27 23:05:53,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2018-01-27 23:05:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:53,138 INFO L225 Difference]: With dead ends: 168 [2018-01-27 23:05:53,138 INFO L226 Difference]: Without dead ends: 110 [2018-01-27 23:05:53,138 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:05:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-27 23:05:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2018-01-27 23:05:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-27 23:05:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2018-01-27 23:05:53,148 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 143 [2018-01-27 23:05:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:53,148 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2018-01-27 23:05:53,148 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:05:53,149 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2018-01-27 23:05:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-01-27 23:05:53,150 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:53,150 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 9, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:53,151 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1984164066, now seen corresponding path program 8 times [2018-01-27 23:05:53,151 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:53,151 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:53,152 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:53,152 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:53,152 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:53,180 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:05:53,350 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:53,350 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 [2018-01-27 23:05:53,355 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:05:53,371 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:53,390 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:53,409 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:53,414 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:05:53,553 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:53,553 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-27 23:05:53,553 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-27 23:05:53,553 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-27 23:05:53,554 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:05:53,554 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 12 states. [2018-01-27 23:05:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:53,590 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-01-27 23:05:53,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:05:53,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 148 [2018-01-27 23:05:53,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:53,591 INFO L225 Difference]: With dead ends: 173 [2018-01-27 23:05:53,592 INFO L226 Difference]: Without dead ends: 115 [2018-01-27 23:05:53,592 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:05:53,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-27 23:05:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-01-27 23:05:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-27 23:05:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2018-01-27 23:05:53,603 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 148 [2018-01-27 23:05:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:53,604 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2018-01-27 23:05:53,604 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-27 23:05:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2018-01-27 23:05:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-01-27 23:05:53,605 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:53,607 INFO L330 BasicCegarLoop]: trace histogram [12, 10, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:53,607 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:53,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2114641131, now seen corresponding path program 9 times [2018-01-27 23:05:53,608 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:53,608 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:53,608 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:53,608 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:53,609 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:53,638 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:05:54,124 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:54,124 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 [2018-01-27 23:05:54,130 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:05:54,146 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:05:54,152 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:05:54,157 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:05:54,163 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:05:54,164 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:54,177 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 124 proven. 21 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-01-27 23:05:54,280 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:54,280 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2018-01-27 23:05:54,281 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-27 23:05:54,281 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-27 23:05:54,281 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:05:54,281 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand 16 states. [2018-01-27 23:05:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:54,467 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2018-01-27 23:05:54,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:05:54,468 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 153 [2018-01-27 23:05:54,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:54,469 INFO L225 Difference]: With dead ends: 186 [2018-01-27 23:05:54,470 INFO L226 Difference]: Without dead ends: 128 [2018-01-27 23:05:54,470 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:05:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-01-27 23:05:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2018-01-27 23:05:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-27 23:05:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2018-01-27 23:05:54,478 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 153 [2018-01-27 23:05:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:54,478 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2018-01-27 23:05:54,478 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-27 23:05:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2018-01-27 23:05:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-01-27 23:05:54,479 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:54,479 INFO L330 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 11, 10, 10, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:54,479 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1819817847, now seen corresponding path program 10 times [2018-01-27 23:05:54,479 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:54,479 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:54,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:54,480 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:54,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:54,510 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:05:55,002 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:55,041 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 [2018-01-27 23:05:55,046 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:05:55,118 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:55,121 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:05:55,182 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:55,183 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-01-27 23:05:55,183 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-27 23:05:55,183 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-27 23:05:55,183 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-27 23:05:55,184 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand 14 states. [2018-01-27 23:05:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:55,238 INFO L93 Difference]: Finished difference Result 193 states and 209 transitions. [2018-01-27 23:05:55,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-27 23:05:55,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 173 [2018-01-27 23:05:55,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:55,240 INFO L225 Difference]: With dead ends: 193 [2018-01-27 23:05:55,240 INFO L226 Difference]: Without dead ends: 130 [2018-01-27 23:05:55,241 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-27 23:05:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-27 23:05:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2018-01-27 23:05:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-27 23:05:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 135 transitions. [2018-01-27 23:05:55,246 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 135 transitions. Word has length 173 [2018-01-27 23:05:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:55,247 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 135 transitions. [2018-01-27 23:05:55,247 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-27 23:05:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 135 transitions. [2018-01-27 23:05:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-01-27 23:05:55,248 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:55,248 INFO L330 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 12, 11, 11, 11, 11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:55,248 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:55,249 INFO L82 PathProgramCache]: Analyzing trace with hash -830367158, now seen corresponding path program 11 times [2018-01-27 23:05:55,249 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:55,249 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:55,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:55,250 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:55,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:55,280 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:05:56,139 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:56,140 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 [2018-01-27 23:05:56,146 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:05:56,158 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,159 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,162 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,176 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,188 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,193 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,199 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,223 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,240 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,271 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,426 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:56,428 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:56,433 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 198 proven. 38 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2018-01-27 23:05:56,652 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:56,652 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2018-01-27 23:05:56,652 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-27 23:05:56,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-27 23:05:56,653 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:05:56,653 INFO L87 Difference]: Start difference. First operand 127 states and 135 transitions. Second operand 19 states. [2018-01-27 23:05:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:56,833 INFO L93 Difference]: Finished difference Result 206 states and 228 transitions. [2018-01-27 23:05:56,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-27 23:05:56,833 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 178 [2018-01-27 23:05:56,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:56,834 INFO L225 Difference]: With dead ends: 206 [2018-01-27 23:05:56,834 INFO L226 Difference]: Without dead ends: 143 [2018-01-27 23:05:56,834 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:05:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-27 23:05:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2018-01-27 23:05:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-01-27 23:05:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2018-01-27 23:05:56,842 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 178 [2018-01-27 23:05:56,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:56,843 INFO L432 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2018-01-27 23:05:56,843 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-27 23:05:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2018-01-27 23:05:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-01-27 23:05:56,845 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:56,845 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 13, 12, 12, 12, 12, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:56,845 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:56,845 INFO L82 PathProgramCache]: Analyzing trace with hash -6713794, now seen corresponding path program 12 times [2018-01-27 23:05:56,845 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:56,846 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:56,846 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:56,847 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:56,847 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:56,883 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2018-01-27 23:05:57,530 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:57,530 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 [2018-01-27 23:05:57,535 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:05:57,555 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:57,559 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:57,564 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:57,568 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:57,573 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:57,592 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:57,618 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:05:57,619 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:57,624 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 302 proven. 10 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-01-27 23:05:57,713 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:57,713 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2018-01-27 23:05:57,713 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:05:57,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:05:57,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:05:57,714 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand 18 states. [2018-01-27 23:05:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:57,881 INFO L93 Difference]: Finished difference Result 223 states and 242 transitions. [2018-01-27 23:05:57,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-27 23:05:57,881 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 198 [2018-01-27 23:05:57,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:57,882 INFO L225 Difference]: With dead ends: 223 [2018-01-27 23:05:57,882 INFO L226 Difference]: Without dead ends: 155 [2018-01-27 23:05:57,883 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:05:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-01-27 23:05:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-01-27 23:05:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-01-27 23:05:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 157 transitions. [2018-01-27 23:05:57,892 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 157 transitions. Word has length 198 [2018-01-27 23:05:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:57,892 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 157 transitions. [2018-01-27 23:05:57,892 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:05:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 157 transitions. [2018-01-27 23:05:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-01-27 23:05:57,894 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:57,894 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 14, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:57,894 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:57,894 INFO L82 PathProgramCache]: Analyzing trace with hash 863813443, now seen corresponding path program 13 times [2018-01-27 23:05:57,894 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:57,894 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:57,895 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:57,895 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:57,896 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:57,928 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:05:58,419 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:58,419 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 [2018-01-27 23:05:58,428 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:58,489 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:05:58,584 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:58,584 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-01-27 23:05:58,585 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-27 23:05:58,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-27 23:05:58,585 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-27 23:05:58,585 INFO L87 Difference]: Start difference. First operand 148 states and 157 transitions. Second operand 17 states. [2018-01-27 23:05:58,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:58,661 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2018-01-27 23:05:58,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:05:58,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 209 [2018-01-27 23:05:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:58,663 INFO L225 Difference]: With dead ends: 230 [2018-01-27 23:05:58,663 INFO L226 Difference]: Without dead ends: 156 [2018-01-27 23:05:58,663 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-27 23:05:58,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-27 23:05:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2018-01-27 23:05:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-01-27 23:05:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 162 transitions. [2018-01-27 23:05:58,673 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 162 transitions. Word has length 209 [2018-01-27 23:05:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:58,673 INFO L432 AbstractCegarLoop]: Abstraction has 153 states and 162 transitions. [2018-01-27 23:05:58,673 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-27 23:05:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 162 transitions. [2018-01-27 23:05:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-01-27 23:05:58,674 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:58,675 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 15, 14, 14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:58,675 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:58,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2001761430, now seen corresponding path program 14 times [2018-01-27 23:05:58,675 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:58,675 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:58,676 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:58,676 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:05:58,676 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:58,708 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:05:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:05:59,272 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:05:59,272 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 [2018-01-27 23:05:59,277 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:05:59,298 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:59,324 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:05:59,328 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:05:59,333 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:05:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:05:59,406 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:05:59,407 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-27 23:05:59,407 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:05:59,407 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:05:59,407 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:05:59,408 INFO L87 Difference]: Start difference. First operand 153 states and 162 transitions. Second operand 18 states. [2018-01-27 23:05:59,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:05:59,478 INFO L93 Difference]: Finished difference Result 235 states and 253 transitions. [2018-01-27 23:05:59,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-27 23:05:59,479 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 214 [2018-01-27 23:05:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:05:59,480 INFO L225 Difference]: With dead ends: 235 [2018-01-27 23:05:59,481 INFO L226 Difference]: Without dead ends: 161 [2018-01-27 23:05:59,481 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:05:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-01-27 23:05:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2018-01-27 23:05:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-27 23:05:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2018-01-27 23:05:59,488 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 214 [2018-01-27 23:05:59,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:05:59,489 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2018-01-27 23:05:59,489 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:05:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2018-01-27 23:05:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-01-27 23:05:59,490 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:05:59,490 INFO L330 BasicCegarLoop]: trace histogram [18, 16, 15, 15, 15, 15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:05:59,490 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:05:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash 170400547, now seen corresponding path program 15 times [2018-01-27 23:05:59,491 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:05:59,491 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:05:59,491 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:59,491 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:05:59,492 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:05:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:05:59,530 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:06:00,654 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:00,654 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 [2018-01-27 23:06:00,662 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:06:00,681 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:00,687 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:00,692 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:00,698 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:00,704 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:00,705 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:00,709 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 302 proven. 24 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-01-27 23:06:00,796 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:00,797 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2018-01-27 23:06:00,797 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-27 23:06:00,797 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-27 23:06:00,798 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:06:00,798 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand 22 states. [2018-01-27 23:06:00,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:00,977 INFO L93 Difference]: Finished difference Result 250 states and 269 transitions. [2018-01-27 23:06:00,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:06:00,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 219 [2018-01-27 23:06:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:00,979 INFO L225 Difference]: With dead ends: 250 [2018-01-27 23:06:00,979 INFO L226 Difference]: Without dead ends: 176 [2018-01-27 23:06:00,979 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:06:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-01-27 23:06:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2018-01-27 23:06:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-01-27 23:06:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2018-01-27 23:06:00,986 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 219 [2018-01-27 23:06:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:00,986 INFO L432 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2018-01-27 23:06:00,986 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-27 23:06:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2018-01-27 23:06:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-01-27 23:06:00,988 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:00,988 INFO L330 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 16, 16, 15, 15, 15, 15, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:00,988 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:00,988 INFO L82 PathProgramCache]: Analyzing trace with hash -5048082, now seen corresponding path program 16 times [2018-01-27 23:06:00,989 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:00,989 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:00,990 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:00,990 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:00,991 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:01,027 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:06:02,018 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:02,018 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 [2018-01-27 23:06:02,023 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:06:02,160 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:02,167 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:06:02,349 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:02,349 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-01-27 23:06:02,349 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-27 23:06:02,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-27 23:06:02,350 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-27 23:06:02,350 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand 20 states. [2018-01-27 23:06:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:03,176 INFO L93 Difference]: Finished difference Result 257 states and 275 transitions. [2018-01-27 23:06:03,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-27 23:06:03,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 230 [2018-01-27 23:06:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:03,178 INFO L225 Difference]: With dead ends: 257 [2018-01-27 23:06:03,178 INFO L226 Difference]: Without dead ends: 177 [2018-01-27 23:06:03,179 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-27 23:06:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-01-27 23:06:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2018-01-27 23:06:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-01-27 23:06:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 183 transitions. [2018-01-27 23:06:03,186 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 183 transitions. Word has length 230 [2018-01-27 23:06:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:03,187 INFO L432 AbstractCegarLoop]: Abstraction has 174 states and 183 transitions. [2018-01-27 23:06:03,187 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-27 23:06:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 183 transitions. [2018-01-27 23:06:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-01-27 23:06:03,188 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:03,189 INFO L330 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 15, 15, 15, 15, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:03,189 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:03,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1743919749, now seen corresponding path program 17 times [2018-01-27 23:06:03,189 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:03,189 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:03,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:03,190 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:03,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:03,220 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:06:04,266 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:04,266 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 [2018-01-27 23:06:04,273 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:06:04,291 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,295 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,296 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,298 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,302 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,306 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,311 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,321 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,329 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,410 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,426 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,502 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,547 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,620 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:04,966 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:05,405 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:05,408 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:05,413 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 296 proven. 60 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2018-01-27 23:06:05,590 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:05,590 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2018-01-27 23:06:05,590 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:06:05,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:06:05,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:06:05,591 INFO L87 Difference]: Start difference. First operand 174 states and 183 transitions. Second operand 26 states. [2018-01-27 23:06:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:05,856 INFO L93 Difference]: Finished difference Result 270 states and 294 transitions. [2018-01-27 23:06:05,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-27 23:06:05,861 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 235 [2018-01-27 23:06:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:05,863 INFO L225 Difference]: With dead ends: 270 [2018-01-27 23:06:05,863 INFO L226 Difference]: Without dead ends: 190 [2018-01-27 23:06:05,864 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:06:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-01-27 23:06:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2018-01-27 23:06:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-01-27 23:06:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 194 transitions. [2018-01-27 23:06:05,873 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 194 transitions. Word has length 235 [2018-01-27 23:06:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:05,874 INFO L432 AbstractCegarLoop]: Abstraction has 184 states and 194 transitions. [2018-01-27 23:06:05,874 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:06:05,874 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 194 transitions. [2018-01-27 23:06:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-01-27 23:06:05,876 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:05,877 INFO L330 BasicCegarLoop]: trace histogram [21, 19, 18, 18, 18, 18, 18, 18, 18, 18, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:05,877 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:05,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1556418649, now seen corresponding path program 18 times [2018-01-27 23:06:05,877 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:05,878 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:05,878 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:05,879 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:05,879 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:05,924 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-01-27 23:06:06,921 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:06,921 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 [2018-01-27 23:06:06,927 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:06:06,951 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:06,964 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:06,987 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:06,996 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:07,003 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:07,009 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:07,022 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:07,031 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:07,038 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:07,083 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:07,211 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:07,213 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:07,217 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 420 proven. 44 refuted. 0 times theorem prover too weak. 1272 trivial. 0 not checked. [2018-01-27 23:06:07,375 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:07,375 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2018-01-27 23:06:07,376 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:06:07,376 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:06:07,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=420, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:06:07,377 INFO L87 Difference]: Start difference. First operand 184 states and 194 transitions. Second operand 26 states. [2018-01-27 23:06:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:07,560 INFO L93 Difference]: Finished difference Result 287 states and 308 transitions. [2018-01-27 23:06:07,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-27 23:06:07,561 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 255 [2018-01-27 23:06:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:07,563 INFO L225 Difference]: With dead ends: 287 [2018-01-27 23:06:07,563 INFO L226 Difference]: Without dead ends: 202 [2018-01-27 23:06:07,564 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=420, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:06:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-01-27 23:06:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2018-01-27 23:06:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-01-27 23:06:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 205 transitions. [2018-01-27 23:06:07,572 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 205 transitions. Word has length 255 [2018-01-27 23:06:07,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:07,573 INFO L432 AbstractCegarLoop]: Abstraction has 195 states and 205 transitions. [2018-01-27 23:06:07,574 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:06:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 205 transitions. [2018-01-27 23:06:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-01-27 23:06:07,576 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:07,576 INFO L330 BasicCegarLoop]: trace histogram [21, 20, 19, 19, 19, 19, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:07,576 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:07,576 INFO L82 PathProgramCache]: Analyzing trace with hash -665663678, now seen corresponding path program 19 times [2018-01-27 23:06:07,576 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:07,577 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:07,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:07,578 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:07,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:07,617 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:06:08,342 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:08,342 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 [2018-01-27 23:06:08,349 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:08,426 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:06:08,556 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:08,557 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-01-27 23:06:08,557 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-27 23:06:08,557 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-27 23:06:08,558 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-27 23:06:08,558 INFO L87 Difference]: Start difference. First operand 195 states and 205 transitions. Second operand 23 states. [2018-01-27 23:06:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:08,661 INFO L93 Difference]: Finished difference Result 291 states and 311 transitions. [2018-01-27 23:06:08,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:06:08,662 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 266 [2018-01-27 23:06:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:08,663 INFO L225 Difference]: With dead ends: 291 [2018-01-27 23:06:08,663 INFO L226 Difference]: Without dead ends: 200 [2018-01-27 23:06:08,663 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-27 23:06:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-01-27 23:06:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-01-27 23:06:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-01-27 23:06:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 210 transitions. [2018-01-27 23:06:08,672 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 210 transitions. Word has length 266 [2018-01-27 23:06:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:08,672 INFO L432 AbstractCegarLoop]: Abstraction has 200 states and 210 transitions. [2018-01-27 23:06:08,672 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-27 23:06:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 210 transitions. [2018-01-27 23:06:08,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-01-27 23:06:08,674 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:08,674 INFO L330 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:08,674 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1444360527, now seen corresponding path program 20 times [2018-01-27 23:06:08,675 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:08,677 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:08,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:08,678 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:08,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:08,719 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2018-01-27 23:06:08,984 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:08,984 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 [2018-01-27 23:06:08,990 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:06:09,011 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:09,044 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:09,053 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:09,058 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 414 proven. 87 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-01-27 23:06:09,226 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:09,226 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-27 23:06:09,227 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-27 23:06:09,227 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-27 23:06:09,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-27 23:06:09,227 INFO L87 Difference]: Start difference. First operand 200 states and 210 transitions. Second operand 10 states. [2018-01-27 23:06:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:09,255 INFO L93 Difference]: Finished difference Result 298 states and 322 transitions. [2018-01-27 23:06:09,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-27 23:06:09,257 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 271 [2018-01-27 23:06:09,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:09,259 INFO L225 Difference]: With dead ends: 298 [2018-01-27 23:06:09,259 INFO L226 Difference]: Without dead ends: 208 [2018-01-27 23:06:09,260 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-01-27 23:06:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-01-27 23:06:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2018-01-27 23:06:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-01-27 23:06:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 216 transitions. [2018-01-27 23:06:09,268 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 216 transitions. Word has length 271 [2018-01-27 23:06:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:09,268 INFO L432 AbstractCegarLoop]: Abstraction has 205 states and 216 transitions. [2018-01-27 23:06:09,269 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-27 23:06:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 216 transitions. [2018-01-27 23:06:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-01-27 23:06:09,270 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:09,271 INFO L330 BasicCegarLoop]: trace histogram [24, 21, 21, 21, 21, 21, 20, 20, 20, 20, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:09,271 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1237919674, now seen corresponding path program 21 times [2018-01-27 23:06:09,271 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:09,271 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:09,272 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:09,272 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:09,272 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:09,310 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 1579 trivial. 0 not checked. [2018-01-27 23:06:09,607 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:09,607 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:09,611 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:06:09,632 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:09,637 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:09,642 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:09,648 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:09,656 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:09,665 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:09,675 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:09,676 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:09,679 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 558 proven. 70 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2018-01-27 23:06:09,804 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:09,804 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2018-01-27 23:06:09,805 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-27 23:06:09,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-27 23:06:09,805 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:06:09,805 INFO L87 Difference]: Start difference. First operand 205 states and 216 transitions. Second operand 16 states. [2018-01-27 23:06:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:09,952 INFO L93 Difference]: Finished difference Result 318 states and 345 transitions. [2018-01-27 23:06:09,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:06:09,952 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 286 [2018-01-27 23:06:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:09,954 INFO L225 Difference]: With dead ends: 318 [2018-01-27 23:06:09,954 INFO L226 Difference]: Without dead ends: 223 [2018-01-27 23:06:09,955 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:06:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-01-27 23:06:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2018-01-27 23:06:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-01-27 23:06:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 228 transitions. [2018-01-27 23:06:09,963 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 228 transitions. Word has length 286 [2018-01-27 23:06:09,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:09,963 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 228 transitions. [2018-01-27 23:06:09,963 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-27 23:06:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 228 transitions. [2018-01-27 23:06:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-01-27 23:06:09,966 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:09,967 INFO L330 BasicCegarLoop]: trace histogram [27, 24, 24, 24, 24, 21, 20, 20, 20, 20, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:09,967 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1223298103, now seen corresponding path program 22 times [2018-01-27 23:06:09,967 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:09,967 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:09,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:09,968 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:09,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:10,020 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2634 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-01-27 23:06:10,753 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:10,753 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:10,762 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:06:11,199 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:11,210 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2634 backedges. 710 proven. 156 refuted. 0 times theorem prover too weak. 1768 trivial. 0 not checked. [2018-01-27 23:06:11,307 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:11,307 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-27 23:06:11,308 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-27 23:06:11,308 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-27 23:06:11,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:06:11,309 INFO L87 Difference]: Start difference. First operand 216 states and 228 transitions. Second operand 12 states. [2018-01-27 23:06:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:11,454 INFO L93 Difference]: Finished difference Result 330 states and 358 transitions. [2018-01-27 23:06:11,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:06:11,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 307 [2018-01-27 23:06:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:11,458 INFO L225 Difference]: With dead ends: 330 [2018-01-27 23:06:11,458 INFO L226 Difference]: Without dead ends: 224 [2018-01-27 23:06:11,461 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:06:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-01-27 23:06:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2018-01-27 23:06:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-01-27 23:06:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 234 transitions. [2018-01-27 23:06:11,474 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 234 transitions. Word has length 307 [2018-01-27 23:06:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:11,475 INFO L432 AbstractCegarLoop]: Abstraction has 221 states and 234 transitions. [2018-01-27 23:06:11,475 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-27 23:06:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 234 transitions. [2018-01-27 23:06:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-01-27 23:06:11,478 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:11,478 INFO L330 BasicCegarLoop]: trace histogram [30, 27, 27, 27, 27, 21, 20, 20, 20, 20, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:11,479 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:11,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1929641634, now seen corresponding path program 23 times [2018-01-27 23:06:11,479 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:11,479 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:11,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:11,480 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:11,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:11,524 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 0 proven. 1090 refuted. 0 times theorem prover too weak. 1937 trivial. 0 not checked. [2018-01-27 23:06:12,768 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:12,768 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:12,772 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:06:12,797 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,812 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,827 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,846 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,861 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,874 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,882 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,896 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,929 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,945 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:12,979 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:13,004 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:13,024 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:13,050 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:13,223 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:13,366 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:13,663 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:14,066 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:14,308 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:16,026 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:16,030 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:16,040 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 888 proven. 198 refuted. 0 times theorem prover too weak. 1941 trivial. 0 not checked. [2018-01-27 23:06:16,199 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:16,199 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-01-27 23:06:16,199 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-27 23:06:16,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-27 23:06:16,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-01-27 23:06:16,200 INFO L87 Difference]: Start difference. First operand 221 states and 234 transitions. Second operand 13 states. [2018-01-27 23:06:16,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:16,665 INFO L93 Difference]: Finished difference Result 340 states and 370 transitions. [2018-01-27 23:06:16,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-27 23:06:16,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 322 [2018-01-27 23:06:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:16,668 INFO L225 Difference]: With dead ends: 340 [2018-01-27 23:06:16,668 INFO L226 Difference]: Without dead ends: 229 [2018-01-27 23:06:16,669 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-01-27 23:06:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-01-27 23:06:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2018-01-27 23:06:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-01-27 23:06:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 240 transitions. [2018-01-27 23:06:16,679 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 240 transitions. Word has length 322 [2018-01-27 23:06:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:16,679 INFO L432 AbstractCegarLoop]: Abstraction has 226 states and 240 transitions. [2018-01-27 23:06:16,679 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-27 23:06:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 240 transitions. [2018-01-27 23:06:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-01-27 23:06:16,682 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:16,682 INFO L330 BasicCegarLoop]: trace histogram [33, 30, 30, 30, 30, 21, 20, 20, 20, 20, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:16,682 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:16,682 INFO L82 PathProgramCache]: Analyzing trace with hash -225609897, now seen corresponding path program 24 times [2018-01-27 23:06:16,683 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:16,683 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:16,683 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:16,683 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:16,684 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:16,729 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3465 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2130 trivial. 0 not checked. [2018-01-27 23:06:17,592 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:17,592 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:17,599 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:06:17,623 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,627 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,632 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,636 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,641 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,651 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,663 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,684 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,705 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,726 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,799 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,841 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:17,961 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:18,108 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:18,409 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:18,411 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:18,416 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3465 backedges. 1189 proven. 102 refuted. 0 times theorem prover too weak. 2174 trivial. 0 not checked. [2018-01-27 23:06:18,694 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:18,695 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2018-01-27 23:06:18,695 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-27 23:06:18,695 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-27 23:06:18,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:06:18,696 INFO L87 Difference]: Start difference. First operand 226 states and 240 transitions. Second operand 22 states. [2018-01-27 23:06:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:18,932 INFO L93 Difference]: Finished difference Result 360 states and 393 transitions. [2018-01-27 23:06:18,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:06:18,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2018-01-27 23:06:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:18,934 INFO L225 Difference]: With dead ends: 360 [2018-01-27 23:06:18,935 INFO L226 Difference]: Without dead ends: 244 [2018-01-27 23:06:18,936 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-01-27 23:06:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-01-27 23:06:18,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 237. [2018-01-27 23:06:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-01-27 23:06:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 252 transitions. [2018-01-27 23:06:18,948 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 252 transitions. Word has length 337 [2018-01-27 23:06:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:18,949 INFO L432 AbstractCegarLoop]: Abstraction has 237 states and 252 transitions. [2018-01-27 23:06:18,949 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-27 23:06:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 252 transitions. [2018-01-27 23:06:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-01-27 23:06:18,952 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:18,952 INFO L330 BasicCegarLoop]: trace histogram [36, 33, 33, 33, 33, 21, 20, 20, 20, 20, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:18,953 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:18,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1313870730, now seen corresponding path program 25 times [2018-01-27 23:06:18,953 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:18,953 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:18,954 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:18,954 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:18,954 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:19,010 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3986 backedges. 0 proven. 1605 refuted. 0 times theorem prover too weak. 2381 trivial. 0 not checked. [2018-01-27 23:06:19,574 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:19,574 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:19,580 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:19,659 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3986 backedges. 1304 proven. 297 refuted. 0 times theorem prover too weak. 2385 trivial. 0 not checked. [2018-01-27 23:06:19,825 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:19,825 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-01-27 23:06:19,826 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-27 23:06:19,826 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-27 23:06:19,826 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-27 23:06:19,827 INFO L87 Difference]: Start difference. First operand 237 states and 252 transitions. Second operand 15 states. [2018-01-27 23:06:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:20,106 INFO L93 Difference]: Finished difference Result 372 states and 406 transitions. [2018-01-27 23:06:20,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-27 23:06:20,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 358 [2018-01-27 23:06:20,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:20,107 INFO L225 Difference]: With dead ends: 372 [2018-01-27 23:06:20,107 INFO L226 Difference]: Without dead ends: 245 [2018-01-27 23:06:20,108 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-27 23:06:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-01-27 23:06:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2018-01-27 23:06:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-01-27 23:06:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 258 transitions. [2018-01-27 23:06:20,119 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 258 transitions. Word has length 358 [2018-01-27 23:06:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:20,119 INFO L432 AbstractCegarLoop]: Abstraction has 242 states and 258 transitions. [2018-01-27 23:06:20,120 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-27 23:06:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 258 transitions. [2018-01-27 23:06:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-01-27 23:06:20,123 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:20,123 INFO L330 BasicCegarLoop]: trace histogram [39, 36, 36, 36, 36, 21, 20, 20, 20, 20, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:20,124 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:20,124 INFO L82 PathProgramCache]: Analyzing trace with hash -338571713, now seen corresponding path program 26 times [2018-01-27 23:06:20,124 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:20,124 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:20,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:20,125 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:20,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:20,181 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4514 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 2614 trivial. 0 not checked. [2018-01-27 23:06:20,696 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:20,696 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:20,701 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:06:20,727 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:20,787 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:20,795 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:20,801 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4514 backedges. 1542 proven. 354 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-01-27 23:06:21,010 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:21,010 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-01-27 23:06:21,011 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-27 23:06:21,011 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-27 23:06:21,011 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:06:21,012 INFO L87 Difference]: Start difference. First operand 242 states and 258 transitions. Second operand 16 states. [2018-01-27 23:06:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:21,166 INFO L93 Difference]: Finished difference Result 382 states and 418 transitions. [2018-01-27 23:06:21,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-27 23:06:21,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 373 [2018-01-27 23:06:21,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:21,168 INFO L225 Difference]: With dead ends: 382 [2018-01-27 23:06:21,168 INFO L226 Difference]: Without dead ends: 250 [2018-01-27 23:06:21,169 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:06:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-01-27 23:06:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2018-01-27 23:06:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-01-27 23:06:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 264 transitions. [2018-01-27 23:06:21,181 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 264 transitions. Word has length 373 [2018-01-27 23:06:21,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:21,182 INFO L432 AbstractCegarLoop]: Abstraction has 247 states and 264 transitions. [2018-01-27 23:06:21,182 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-27 23:06:21,182 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 264 transitions. [2018-01-27 23:06:21,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-01-27 23:06:21,185 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:21,185 INFO L330 BasicCegarLoop]: trace histogram [42, 39, 39, 39, 39, 21, 20, 20, 20, 20, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:21,185 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1183765846, now seen corresponding path program 27 times [2018-01-27 23:06:21,186 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:21,186 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:21,186 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:21,186 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:21,187 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:21,236 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5087 backedges. 0 proven. 2220 refuted. 0 times theorem prover too weak. 2867 trivial. 0 not checked. [2018-01-27 23:06:22,456 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:22,456 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:22,468 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:06:22,493 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:22,499 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:22,504 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:22,510 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:22,517 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:22,538 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:22,552 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:22,567 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:22,594 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:22,596 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:22,600 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5087 backedges. 1806 proven. 140 refuted. 0 times theorem prover too weak. 3141 trivial. 0 not checked. [2018-01-27 23:06:23,010 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:23,010 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2018-01-27 23:06:23,011 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-27 23:06:23,011 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-27 23:06:23,011 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2018-01-27 23:06:23,011 INFO L87 Difference]: Start difference. First operand 247 states and 264 transitions. Second operand 24 states. [2018-01-27 23:06:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:23,128 INFO L93 Difference]: Finished difference Result 402 states and 441 transitions. [2018-01-27 23:06:23,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-27 23:06:23,128 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 388 [2018-01-27 23:06:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:23,129 INFO L225 Difference]: With dead ends: 402 [2018-01-27 23:06:23,129 INFO L226 Difference]: Without dead ends: 265 [2018-01-27 23:06:23,130 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2018-01-27 23:06:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-01-27 23:06:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 258. [2018-01-27 23:06:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-01-27 23:06:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 276 transitions. [2018-01-27 23:06:23,139 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 276 transitions. Word has length 388 [2018-01-27 23:06:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:23,140 INFO L432 AbstractCegarLoop]: Abstraction has 258 states and 276 transitions. [2018-01-27 23:06:23,140 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-27 23:06:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 276 transitions. [2018-01-27 23:06:23,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-01-27 23:06:23,143 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:23,143 INFO L330 BasicCegarLoop]: trace histogram [45, 42, 42, 42, 42, 21, 20, 20, 20, 20, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:23,143 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:23,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1949131559, now seen corresponding path program 28 times [2018-01-27 23:06:23,144 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:23,144 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:23,145 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:23,145 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:23,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:23,199 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5749 backedges. 0 proven. 2565 refuted. 0 times theorem prover too weak. 3184 trivial. 0 not checked. [2018-01-27 23:06:23,888 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:23,888 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-27 23:06:23,902 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:24,550 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:24,557 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5749 backedges. 2078 proven. 483 refuted. 0 times theorem prover too weak. 3188 trivial. 0 not checked. [2018-01-27 23:06:24,695 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:24,695 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-27 23:06:24,696 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:06:24,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:06:24,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:06:24,697 INFO L87 Difference]: Start difference. First operand 258 states and 276 transitions. Second operand 18 states. [2018-01-27 23:06:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:24,753 INFO L93 Difference]: Finished difference Result 414 states and 454 transitions. [2018-01-27 23:06:24,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-27 23:06:24,754 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 409 [2018-01-27 23:06:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:24,756 INFO L225 Difference]: With dead ends: 414 [2018-01-27 23:06:24,756 INFO L226 Difference]: Without dead ends: 266 [2018-01-27 23:06:24,757 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:06:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-01-27 23:06:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2018-01-27 23:06:24,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-01-27 23:06:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 282 transitions. [2018-01-27 23:06:24,769 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 282 transitions. Word has length 409 [2018-01-27 23:06:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:24,769 INFO L432 AbstractCegarLoop]: Abstraction has 263 states and 282 transitions. [2018-01-27 23:06:24,769 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:06:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 282 transitions. [2018-01-27 23:06:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-01-27 23:06:24,772 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:24,773 INFO L330 BasicCegarLoop]: trace histogram [48, 45, 45, 45, 45, 21, 20, 20, 20, 20, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:24,773 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:24,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2041543570, now seen corresponding path program 29 times [2018-01-27 23:06:24,773 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:24,773 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:24,776 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:24,776 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:24,776 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:24,826 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6412 backedges. 0 proven. 2935 refuted. 0 times theorem prover too weak. 3477 trivial. 0 not checked. [2018-01-27 23:06:25,654 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:25,654 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-27 23:06:25,668 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:25,700 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,714 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,729 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,743 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,757 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,771 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,785 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,795 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,805 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,807 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,812 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,816 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,821 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,825 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,840 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,850 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,867 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,881 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,907 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,918 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,960 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:25,996 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:26,026 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:26,248 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:26,607 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:26,722 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:26,901 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:28,423 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:29,277 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:30,193 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:32,106 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:32,115 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:32,131 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6412 backedges. 2376 proven. 555 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2018-01-27 23:06:32,329 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:32,329 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-01-27 23:06:32,330 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-27 23:06:32,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-27 23:06:32,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:06:32,331 INFO L87 Difference]: Start difference. First operand 263 states and 282 transitions. Second operand 19 states. [2018-01-27 23:06:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:32,569 INFO L93 Difference]: Finished difference Result 424 states and 466 transitions. [2018-01-27 23:06:32,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-27 23:06:32,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 424 [2018-01-27 23:06:32,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:32,570 INFO L225 Difference]: With dead ends: 424 [2018-01-27 23:06:32,570 INFO L226 Difference]: Without dead ends: 271 [2018-01-27 23:06:32,571 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:06:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-01-27 23:06:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2018-01-27 23:06:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-01-27 23:06:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 288 transitions. [2018-01-27 23:06:32,581 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 288 transitions. Word has length 424 [2018-01-27 23:06:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:32,582 INFO L432 AbstractCegarLoop]: Abstraction has 268 states and 288 transitions. [2018-01-27 23:06:32,582 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-27 23:06:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 288 transitions. [2018-01-27 23:06:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-01-27 23:06:32,586 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:32,586 INFO L330 BasicCegarLoop]: trace histogram [51, 48, 48, 48, 48, 21, 20, 20, 20, 20, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:32,586 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:32,586 INFO L82 PathProgramCache]: Analyzing trace with hash -411528633, now seen corresponding path program 30 times [2018-01-27 23:06:32,587 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:32,587 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:32,587 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:32,588 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:32,588 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:32,645 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 0 proven. 3330 refuted. 0 times theorem prover too weak. 3790 trivial. 0 not checked. [2018-01-27 23:06:33,341 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:33,341 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:33,346 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:06:33,375 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,377 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,382 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,385 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,389 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,396 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,405 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,413 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,424 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,443 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,457 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,496 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,507 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,560 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,577 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,733 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,761 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,905 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,975 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:06:33,977 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:33,984 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 2700 proven. 184 refuted. 0 times theorem prover too weak. 4236 trivial. 0 not checked. [2018-01-27 23:06:34,362 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:34,362 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2018-01-27 23:06:34,363 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-27 23:06:34,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-27 23:06:34,363 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2018-01-27 23:06:34,363 INFO L87 Difference]: Start difference. First operand 268 states and 288 transitions. Second operand 28 states. [2018-01-27 23:06:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:34,633 INFO L93 Difference]: Finished difference Result 444 states and 489 transitions. [2018-01-27 23:06:34,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-27 23:06:34,634 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 439 [2018-01-27 23:06:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:34,635 INFO L225 Difference]: With dead ends: 444 [2018-01-27 23:06:34,635 INFO L226 Difference]: Without dead ends: 286 [2018-01-27 23:06:34,636 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2018-01-27 23:06:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-01-27 23:06:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 279. [2018-01-27 23:06:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-01-27 23:06:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 300 transitions. [2018-01-27 23:06:34,646 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 300 transitions. Word has length 439 [2018-01-27 23:06:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:34,646 INFO L432 AbstractCegarLoop]: Abstraction has 279 states and 300 transitions. [2018-01-27 23:06:34,646 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-27 23:06:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 300 transitions. [2018-01-27 23:06:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2018-01-27 23:06:34,650 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:34,650 INFO L330 BasicCegarLoop]: trace histogram [54, 51, 51, 51, 51, 21, 20, 20, 20, 20, 10, 9, 9, 9, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:34,650 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:34,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1102673286, now seen corresponding path program 31 times [2018-01-27 23:06:34,651 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:34,651 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:34,651 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:34,652 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:34,652 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:34,706 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7923 backedges. 0 proven. 3750 refuted. 0 times theorem prover too weak. 4173 trivial. 0 not checked. [2018-01-27 23:06:35,454 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:35,454 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:35,459 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:35,592 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7923 backedges. 3032 proven. 714 refuted. 0 times theorem prover too weak. 4177 trivial. 0 not checked. [2018-01-27 23:06:35,848 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:35,848 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-01-27 23:06:35,849 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-27 23:06:35,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-27 23:06:35,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-01-27 23:06:35,849 INFO L87 Difference]: Start difference. First operand 279 states and 300 transitions. Second operand 21 states. [2018-01-27 23:06:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:35,914 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2018-01-27 23:06:35,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-27 23:06:35,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 460 [2018-01-27 23:06:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:35,915 INFO L225 Difference]: With dead ends: 456 [2018-01-27 23:06:35,915 INFO L226 Difference]: Without dead ends: 287 [2018-01-27 23:06:35,916 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-01-27 23:06:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-01-27 23:06:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2018-01-27 23:06:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-01-27 23:06:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 306 transitions. [2018-01-27 23:06:35,924 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 306 transitions. Word has length 460 [2018-01-27 23:06:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:35,925 INFO L432 AbstractCegarLoop]: Abstraction has 284 states and 306 transitions. [2018-01-27 23:06:35,925 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-27 23:06:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 306 transitions. [2018-01-27 23:06:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-01-27 23:06:35,928 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:35,929 INFO L330 BasicCegarLoop]: trace histogram [57, 54, 54, 54, 54, 21, 20, 20, 20, 20, 10, 9, 9, 9, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:35,929 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1568973615, now seen corresponding path program 32 times [2018-01-27 23:06:35,929 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:35,929 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:35,931 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:35,931 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:06:35,932 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:35,988 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8721 backedges. 0 proven. 4195 refuted. 0 times theorem prover too weak. 4526 trivial. 0 not checked. [2018-01-27 23:06:36,849 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:36,850 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:36,855 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:06:36,887 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:36,956 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:06:36,967 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:36,972 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:06:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8721 backedges. 3390 proven. 801 refuted. 0 times theorem prover too weak. 4530 trivial. 0 not checked. [2018-01-27 23:06:37,229 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:37,229 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-01-27 23:06:37,230 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-27 23:06:37,230 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-27 23:06:37,230 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:06:37,231 INFO L87 Difference]: Start difference. First operand 284 states and 306 transitions. Second operand 22 states. [2018-01-27 23:06:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:06:38,019 INFO L93 Difference]: Finished difference Result 466 states and 514 transitions. [2018-01-27 23:06:38,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-27 23:06:38,019 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 475 [2018-01-27 23:06:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:06:38,020 INFO L225 Difference]: With dead ends: 466 [2018-01-27 23:06:38,021 INFO L226 Difference]: Without dead ends: 292 [2018-01-27 23:06:38,021 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:06:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-01-27 23:06:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2018-01-27 23:06:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-01-27 23:06:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 312 transitions. [2018-01-27 23:06:38,031 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 312 transitions. Word has length 475 [2018-01-27 23:06:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:06:38,031 INFO L432 AbstractCegarLoop]: Abstraction has 289 states and 312 transitions. [2018-01-27 23:06:38,031 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-27 23:06:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 312 transitions. [2018-01-27 23:06:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2018-01-27 23:06:38,035 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:06:38,035 INFO L330 BasicCegarLoop]: trace histogram [60, 57, 57, 57, 57, 21, 20, 20, 20, 20, 10, 9, 9, 9, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:06:38,035 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:06:38,035 INFO L82 PathProgramCache]: Analyzing trace with hash 185047654, now seen corresponding path program 33 times [2018-01-27 23:06:38,035 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:06:38,036 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:06:38,036 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:38,036 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:06:38,036 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:06:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:06:38,098 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:06:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9564 backedges. 0 proven. 4665 refuted. 0 times theorem prover too weak. 4899 trivial. 0 not checked. [2018-01-27 23:06:39,190 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:06:39,190 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:06:39,195 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:06:39,225 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,230 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,234 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,241 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,247 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,265 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,313 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,338 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,479 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,582 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:06:39,892 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:06:39,896 INFO L270 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-01-27 23:06:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9564 backedges. 3774 proven. 234 refuted. 0 times theorem prover too weak. 5556 trivial. 0 not checked. [2018-01-27 23:06:40,268 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:06:40,268 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2018-01-27 23:06:40,268 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-27 23:06:40,269 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-27 23:06:40,269 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=696, Unknown=0, NotChecked=0, Total=992 [2018-01-27 23:06:40,269 INFO L87 Difference]: Start difference. First operand 289 states and 312 transitions. Second operand 32 states. [2018-01-27 23:06:40,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-27 23:06:40,270 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-27 23:06:40,274 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:06:40,275 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:06:40,275 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:06:40,275 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:06:40,275 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:06:40,275 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:06:40,275 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:06:40,275 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-27 23:06:40,275 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:06:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:06:40,277 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-27 23:06:40,278 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:06:40,278 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:06:40,278 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:06:40,278 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:06:40,278 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:06:40,278 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:06:40,278 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:06:40,278 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == sepErr0EnsuresViolation======== [2018-01-27 23:06:40,279 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:06:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:06:40,279 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-27 23:06:40,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:06:40 BoogieIcfgContainer [2018-01-27 23:06:40,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-27 23:06:40,281 INFO L168 Benchmark]: Toolchain (without parser) took 54211.44 ms. Allocated memory was 308.3 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 269.0 MB in the beginning and 1.1 GB in the end (delta: -799.0 MB). Peak memory consumption was 202.9 MB. Max. memory is 5.3 GB. [2018-01-27 23:06:40,282 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 308.3 MB. Free memory is still 273.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-27 23:06:40,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.92 ms. Allocated memory is still 308.3 MB. Free memory was 267.0 MB in the beginning and 259.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-01-27 23:06:40,283 INFO L168 Benchmark]: Boogie Preprocessor took 46.06 ms. Allocated memory is still 308.3 MB. Free memory was 259.0 MB in the beginning and 257.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-27 23:06:40,283 INFO L168 Benchmark]: RCFGBuilder took 631.99 ms. Allocated memory is still 308.3 MB. Free memory was 257.0 MB in the beginning and 240.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. [2018-01-27 23:06:40,283 INFO L168 Benchmark]: TraceAbstraction took 53260.85 ms. Allocated memory was 308.3 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 238.0 MB in the beginning and 1.1 GB in the end (delta: -830.0 MB). Peak memory consumption was 171.9 MB. Max. memory is 5.3 GB. [2018-01-27 23:06:40,287 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 308.3 MB. Free memory is still 273.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 253.92 ms. Allocated memory is still 308.3 MB. Free memory was 267.0 MB in the beginning and 259.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 46.06 ms. Allocated memory is still 308.3 MB. Free memory was 259.0 MB in the beginning and 257.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 631.99 ms. Allocated memory is still 308.3 MB. Free memory was 257.0 MB in the beginning and 240.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 53260.85 ms. Allocated memory was 308.3 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 238.0 MB in the beginning and 1.1 GB in the end (delta: -830.0 MB). Peak memory consumption was 171.9 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 54 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=54occurred 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, 0.0s DumpTime, 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, ReuseStatistics: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was constructing difference of abstraction (289states) and interpolant automaton (currently 2 states, 32 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 54 locations, 4 error locations. TIMEOUT Result, 53.0s OverallTime, 37 OverallIterations, 60 TraceHistogramMax, 6.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1826 SDtfs, 1681 SDslu, 16571 SDs, 0 SdLazy, 2571 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9061 GetRequests, 8557 SyntacticMatches, 0 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 17.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=289occurred in iteration=36, 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 36 MinimizatonAttempts, 150 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 17.1s SatisfiabilityAnalysisTime, 25.2s InterpolantComputationTime, 17394 NumberOfCodeBlocks, 15997 NumberOfCodeBlocksAsserted, 245 NumberOfCheckSat, 17323 ConstructedInterpolants, 0 QuantifiedInterpolants, 7409057 SizeOfPredicates, 35 NumberOfNonLiveVariables, 14313 ConjunctsInSsa, 355 ConjunctsInUnsatCore, 71 InterpolantComputations, 4 PerfectInterpolantSequences, 128162/173470 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 18). Cancelled while IsEmpty was searching accepting run (input had 54 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 54 locations, 4 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - TimeoutResultAtElement [Line: 4]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 4). Cancelled while IsEmpty was searching accepting run (input had 54 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: sepErr0EnsuresViolation CFG has 4 procedures, 54 locations, 4 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sep20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-27_23-06-40-297.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sep20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-27_23-06-40-297.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sep20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-27_23-06-40-297.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sep20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-27_23-06-40-297.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sep20_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-27_23-06-40-297.csv Completed graceful shutdown