java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-write.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 22:11:27,127 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 22:11:27,129 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 22:11:27,145 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 22:11:27,145 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 22:11:27,146 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 22:11:27,148 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 22:11:27,150 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 22:11:27,153 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 22:11:27,154 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 22:11:27,155 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 22:11:27,155 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 22:11:27,157 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 22:11:27,158 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 22:11:27,159 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 22:11:27,162 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 22:11:27,164 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 22:11:27,167 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 22:11:27,168 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 22:11:27,169 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 22:11:27,171 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-20 22:11:27,171 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-20 22:11:27,171 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-20 22:11:27,172 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-20 22:11:27,172 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-20 22:11:27,173 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-20 22:11:27,174 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-20 22:11:27,174 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-20 22:11:27,174 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-20 22:11:27,174 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 22:11:27,175 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 22:11:27,175 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-20 22:11:27,187 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 22:11:27,187 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 22:11:27,188 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 22:11:27,188 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 22:11:27,188 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 22:11:27,189 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 22:11:27,189 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 22:11:27,190 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 22:11:27,190 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 22:11:27,190 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 22:11:27,190 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 22:11:27,190 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 22:11:27,191 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 22:11:27,191 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 22:11:27,191 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 22:11:27,191 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 22:11:27,191 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 22:11:27,191 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 22:11:27,192 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 22:11:27,192 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 22:11:27,192 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 22:11:27,192 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 22:11:27,192 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 22:11:27,193 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 22:11:27,193 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 22:11:27,193 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:11:27,193 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 22:11:27,194 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 22:11:27,194 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 22:11:27,194 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 22:11:27,194 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 22:11:27,194 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 22:11:27,194 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 22:11:27,195 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 22:11:27,195 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 22:11:27,196 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 22:11:27,196 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 22:11:27,234 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 22:11:27,248 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 22:11:27,253 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 22:11:27,255 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 22:11:27,255 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 22:11:27,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-write.c [2018-01-20 22:11:27,391 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 22:11:27,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 22:11:27,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 22:11:27,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 22:11:27,405 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 22:11:27,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:11:27" (1/1) ... [2018-01-20 22:11:27,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c12abf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27, skipping insertion in model container [2018-01-20 22:11:27,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:11:27" (1/1) ... [2018-01-20 22:11:27,422 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:11:27,439 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:11:27,550 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:11:27,575 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:11:27,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27 WrapperNode [2018-01-20 22:11:27,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 22:11:27,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 22:11:27,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 22:11:27,583 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 22:11:27,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27" (1/1) ... [2018-01-20 22:11:27,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27" (1/1) ... [2018-01-20 22:11:27,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27" (1/1) ... [2018-01-20 22:11:27,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27" (1/1) ... [2018-01-20 22:11:27,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27" (1/1) ... [2018-01-20 22:11:27,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27" (1/1) ... [2018-01-20 22:11:27,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27" (1/1) ... [2018-01-20 22:11:27,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 22:11:27,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 22:11:27,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 22:11:27,615 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 22:11:27,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:11:27,673 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 22:11:27,673 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 22:11:27,674 INFO L136 BoogieDeclarations]: Found implementation of procedure bar [2018-01-20 22:11:27,674 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-20 22:11:27,674 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 22:11:27,674 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 22:11:27,674 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 22:11:27,674 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 22:11:27,674 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 22:11:27,674 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 22:11:27,674 INFO L128 BoogieDeclarations]: Found specification of procedure bar [2018-01-20 22:11:27,675 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-20 22:11:27,675 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 22:11:27,675 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 22:11:27,675 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 22:11:27,876 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 22:11:27,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:11:27 BoogieIcfgContainer [2018-01-20 22:11:27,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 22:11:27,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 22:11:27,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 22:11:27,881 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 22:11:27,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 10:11:27" (1/3) ... [2018-01-20 22:11:27,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1e1470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:11:27, skipping insertion in model container [2018-01-20 22:11:27,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:11:27" (2/3) ... [2018-01-20 22:11:27,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1e1470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:11:27, skipping insertion in model container [2018-01-20 22:11:27,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:11:27" (3/3) ... [2018-01-20 22:11:27,885 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_false-valid-deref-write.c [2018-01-20 22:11:27,891 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 22:11:27,900 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-01-20 22:11:27,946 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:11:27,946 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:11:27,946 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:11:27,946 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:11:27,947 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:11:27,947 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:11:27,947 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:11:27,947 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == barErr0EnsuresViolation======== [2018-01-20 22:11:27,948 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:11:27,970 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 22:11:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-20 22:11:27,975 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:27,976 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:27,976 INFO L371 AbstractCegarLoop]: === Iteration 1 === [barErr0EnsuresViolation]=== [2018-01-20 22:11:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -492377012, now seen corresponding path program 1 times [2018-01-20 22:11:27,983 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:27,984 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:28,025 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,025 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:28,025 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:28,079 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:11:28,121 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:28,122 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:11:28,123 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:11:28,135 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:11:28,136 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:11:28,138 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-20 22:11:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:28,161 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-20 22:11:28,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:11:28,162 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-20 22:11:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:28,168 INFO L225 Difference]: With dead ends: 114 [2018-01-20 22:11:28,168 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 22:11:28,172 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:11:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 22:11:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 22:11:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 22:11:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 22:11:28,196 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-01-20 22:11:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:28,196 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 22:11:28,197 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:11:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 22:11:28,197 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 22:11:28,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-20 22:11:28,319 INFO L404 ceAbstractionStarter]: At program point L13'''(lines 13 15) the Hoare annotation is: true [2018-01-20 22:11:28,319 INFO L401 ceAbstractionStarter]: For program point barErr0EnsuresViolation(lines 11 17) no Hoare annotation was computed. [2018-01-20 22:11:28,319 INFO L401 ceAbstractionStarter]: For program point L13''(lines 13 15) no Hoare annotation was computed. [2018-01-20 22:11:28,319 INFO L401 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-01-20 22:11:28,320 INFO L401 ceAbstractionStarter]: For program point L13(lines 13 15) no Hoare annotation was computed. [2018-01-20 22:11:28,320 INFO L404 ceAbstractionStarter]: At program point barENTRY(lines 11 17) the Hoare annotation is: true [2018-01-20 22:11:28,320 INFO L401 ceAbstractionStarter]: For program point L13''''(lines 13 15) no Hoare annotation was computed. [2018-01-20 22:11:28,320 INFO L401 ceAbstractionStarter]: For program point barFINAL(lines 11 17) no Hoare annotation was computed. [2018-01-20 22:11:28,320 INFO L401 ceAbstractionStarter]: For program point L14'(line 14) no Hoare annotation was computed. [2018-01-20 22:11:28,320 INFO L401 ceAbstractionStarter]: For program point barEXIT(lines 11 17) no Hoare annotation was computed. [2018-01-20 22:11:28,320 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-20 22:11:28,321 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-20 22:11:28,321 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 43) the Hoare annotation is: true [2018-01-20 22:11:28,321 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-20 22:11:28,321 INFO L401 ceAbstractionStarter]: For program point fooEXIT(lines 20 29) no Hoare annotation was computed. [2018-01-20 22:11:28,321 INFO L401 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-01-20 22:11:28,321 INFO L401 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-01-20 22:11:28,322 INFO L401 ceAbstractionStarter]: For program point L22(lines 22 24) no Hoare annotation was computed. [2018-01-20 22:11:28,322 INFO L401 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-01-20 22:11:28,322 INFO L401 ceAbstractionStarter]: For program point L23'(line 23) no Hoare annotation was computed. [2018-01-20 22:11:28,322 INFO L401 ceAbstractionStarter]: For program point L21'''''(line 21) no Hoare annotation was computed. [2018-01-20 22:11:28,322 INFO L401 ceAbstractionStarter]: For program point L25'(lines 25 27) no Hoare annotation was computed. [2018-01-20 22:11:28,322 INFO L401 ceAbstractionStarter]: For program point L21'''(line 21) no Hoare annotation was computed. [2018-01-20 22:11:28,322 INFO L401 ceAbstractionStarter]: For program point L21'(line 21) no Hoare annotation was computed. [2018-01-20 22:11:28,323 INFO L401 ceAbstractionStarter]: For program point fooFINAL(lines 20 29) no Hoare annotation was computed. [2018-01-20 22:11:28,323 INFO L404 ceAbstractionStarter]: At program point fooENTRY(lines 20 29) the Hoare annotation is: true [2018-01-20 22:11:28,323 INFO L401 ceAbstractionStarter]: For program point L22''(lines 22 24) no Hoare annotation was computed. [2018-01-20 22:11:28,323 INFO L401 ceAbstractionStarter]: For program point L23''(line 23) no Hoare annotation was computed. [2018-01-20 22:11:28,323 INFO L401 ceAbstractionStarter]: For program point L21''(line 21) no Hoare annotation was computed. [2018-01-20 22:11:28,323 INFO L404 ceAbstractionStarter]: At program point L22''''(lines 22 24) the Hoare annotation is: true [2018-01-20 22:11:28,324 INFO L404 ceAbstractionStarter]: At program point L22'''(lines 22 24) the Hoare annotation is: true [2018-01-20 22:11:28,324 INFO L401 ceAbstractionStarter]: For program point fooErr0EnsuresViolation(lines 20 29) no Hoare annotation was computed. [2018-01-20 22:11:28,324 INFO L401 ceAbstractionStarter]: For program point L21''''(line 21) no Hoare annotation was computed. [2018-01-20 22:11:28,324 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 43) the Hoare annotation is: true [2018-01-20 22:11:28,324 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-20 22:11:28,324 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 43) the Hoare annotation is: true [2018-01-20 22:11:28,325 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-20 22:11:28,325 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-20 22:11:28,325 INFO L404 ceAbstractionStarter]: At program point L36''(lines 36 40) the Hoare annotation is: true [2018-01-20 22:11:28,325 INFO L401 ceAbstractionStarter]: For program point L33''(lines 33 35) no Hoare annotation was computed. [2018-01-20 22:11:28,325 INFO L401 ceAbstractionStarter]: For program point L34''(line 34) no Hoare annotation was computed. [2018-01-20 22:11:28,325 INFO L404 ceAbstractionStarter]: At program point L33'''(lines 33 35) the Hoare annotation is: true [2018-01-20 22:11:28,325 INFO L401 ceAbstractionStarter]: For program point L32''(line 32) no Hoare annotation was computed. [2018-01-20 22:11:28,326 INFO L401 ceAbstractionStarter]: For program point L37'(line 37) no Hoare annotation was computed. [2018-01-20 22:11:28,326 INFO L401 ceAbstractionStarter]: For program point L32''''(line 32) no Hoare annotation was computed. [2018-01-20 22:11:28,326 INFO L401 ceAbstractionStarter]: For program point L32'''''(line 32) no Hoare annotation was computed. [2018-01-20 22:11:28,326 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 31 42) no Hoare annotation was computed. [2018-01-20 22:11:28,326 INFO L401 ceAbstractionStarter]: For program point L36'''(lines 36 40) no Hoare annotation was computed. [2018-01-20 22:11:28,326 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 31 42) no Hoare annotation was computed. [2018-01-20 22:11:28,326 INFO L401 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-01-20 22:11:28,327 INFO L401 ceAbstractionStarter]: For program point L32'''(line 32) no Hoare annotation was computed. [2018-01-20 22:11:28,327 INFO L404 ceAbstractionStarter]: At program point L34(line 34) the Hoare annotation is: true [2018-01-20 22:11:28,327 INFO L401 ceAbstractionStarter]: For program point L33(lines 33 35) no Hoare annotation was computed. [2018-01-20 22:11:28,327 INFO L401 ceAbstractionStarter]: For program point L34'''(line 34) no Hoare annotation was computed. [2018-01-20 22:11:28,327 INFO L401 ceAbstractionStarter]: For program point L33''''(lines 33 35) no Hoare annotation was computed. [2018-01-20 22:11:28,327 INFO L401 ceAbstractionStarter]: For program point L36(lines 36 40) no Hoare annotation was computed. [2018-01-20 22:11:28,327 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 31 42) no Hoare annotation was computed. [2018-01-20 22:11:28,328 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 31 42) the Hoare annotation is: true [2018-01-20 22:11:28,328 INFO L401 ceAbstractionStarter]: For program point L38(line 38) no Hoare annotation was computed. [2018-01-20 22:11:28,328 INFO L401 ceAbstractionStarter]: For program point L37(line 37) no Hoare annotation was computed. [2018-01-20 22:11:28,328 INFO L401 ceAbstractionStarter]: For program point L34'(line 34) no Hoare annotation was computed. [2018-01-20 22:11:28,328 INFO L401 ceAbstractionStarter]: For program point L32'(line 32) no Hoare annotation was computed. [2018-01-20 22:11:28,332 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:11:28,333 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:11:28,333 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:11:28,333 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:11:28,333 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:11:28,333 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:11:28,333 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:11:28,333 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 22:11:28,334 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:11:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 22:11:28,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 22:11:28,337 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:28,337 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 22:11:28,337 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 22:11:28,337 INFO L82 PathProgramCache]: Analyzing trace with hash 136143, now seen corresponding path program 1 times [2018-01-20 22:11:28,338 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:28,338 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:28,339 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,339 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:28,339 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:11:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:11:28,369 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 22:11:28,373 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:11:28,377 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:11:28,377 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:11:28,377 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:11:28,377 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:11:28,377 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:11:28,378 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:11:28,378 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:11:28,378 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-20 22:11:28,378 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:11:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 22:11:28,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-20 22:11:28,380 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:28,380 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:28,381 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-20 22:11:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1220349549, now seen corresponding path program 1 times [2018-01-20 22:11:28,381 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:28,381 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:28,382 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,382 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:28,382 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:28,398 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:11:28,419 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:28,419 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:11:28,420 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:11:28,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:11:28,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:11:28,421 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-20 22:11:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:28,429 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-20 22:11:28,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:11:28,430 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-20 22:11:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:28,432 INFO L225 Difference]: With dead ends: 114 [2018-01-20 22:11:28,432 INFO L226 Difference]: Without dead ends: 43 [2018-01-20 22:11:28,433 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:11:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-20 22:11:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-20 22:11:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-20 22:11:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-20 22:11:28,444 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2018-01-20 22:11:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:28,444 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-20 22:11:28,445 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:11:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-20 22:11:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-20 22:11:28,445 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:28,446 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:28,446 INFO L371 AbstractCegarLoop]: === Iteration 2 === [fooErr0EnsuresViolation]=== [2018-01-20 22:11:28,446 INFO L82 PathProgramCache]: Analyzing trace with hash 390316661, now seen corresponding path program 1 times [2018-01-20 22:11:28,446 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:28,446 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:28,447 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,447 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:28,447 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:28,473 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:11:28,599 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:28,599 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-20 22:11:28,601 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-20 22:11:28,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-20 22:11:28,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:11:28,602 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 7 states. [2018-01-20 22:11:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:28,744 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2018-01-20 22:11:28,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 22:11:28,744 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-01-20 22:11:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:28,747 INFO L225 Difference]: With dead ends: 112 [2018-01-20 22:11:28,747 INFO L226 Difference]: Without dead ends: 77 [2018-01-20 22:11:28,748 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:11:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-20 22:11:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2018-01-20 22:11:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-20 22:11:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-01-20 22:11:28,763 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 28 [2018-01-20 22:11:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:28,763 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-01-20 22:11:28,763 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-20 22:11:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-01-20 22:11:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-20 22:11:28,764 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:28,765 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:28,765 INFO L371 AbstractCegarLoop]: === Iteration 3 === [fooErr0EnsuresViolation]=== [2018-01-20 22:11:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2078164222, now seen corresponding path program 1 times [2018-01-20 22:11:28,765 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:28,765 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:28,766 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,766 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:28,766 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:28,779 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-20 22:11:28,847 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:28,847 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-20 22:11:28,847 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 22:11:28,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 22:11:28,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-20 22:11:28,848 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 6 states. [2018-01-20 22:11:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:28,950 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2018-01-20 22:11:28,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-20 22:11:28,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2018-01-20 22:11:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:28,952 INFO L225 Difference]: With dead ends: 129 [2018-01-20 22:11:28,952 INFO L226 Difference]: Without dead ends: 80 [2018-01-20 22:11:28,953 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-20 22:11:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-20 22:11:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2018-01-20 22:11:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-01-20 22:11:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-01-20 22:11:28,960 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 33 [2018-01-20 22:11:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:28,960 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-01-20 22:11:28,960 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 22:11:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-01-20 22:11:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-20 22:11:28,961 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:28,961 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:28,961 INFO L371 AbstractCegarLoop]: === Iteration 4 === [fooErr0EnsuresViolation]=== [2018-01-20 22:11:28,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1168283626, now seen corresponding path program 1 times [2018-01-20 22:11:28,961 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:28,962 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:28,962 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,962 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:28,962 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:28,985 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-20 22:11:29,070 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:29,071 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 22:11:29,071 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 22:11:29,071 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 22:11:29,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 22:11:29,071 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 4 states. [2018-01-20 22:11:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:29,155 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2018-01-20 22:11:29,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 22:11:29,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2018-01-20 22:11:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:29,156 INFO L225 Difference]: With dead ends: 71 [2018-01-20 22:11:29,156 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 22:11:29,157 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-20 22:11:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 22:11:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 22:11:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 22:11:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 22:11:29,157 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-01-20 22:11:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:29,158 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 22:11:29,158 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 22:11:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 22:11:29,158 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 22:11:29,159 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:11:29,159 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:11:29,159 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:11:29,160 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:11:29,160 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:11:29,160 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:11:29,160 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:11:29,160 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 22:11:29,160 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:11:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 22:11:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 22:11:29,162 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:29,162 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:29,162 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -851979775, now seen corresponding path program 1 times [2018-01-20 22:11:29,162 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:29,162 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:29,163 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:29,163 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:29,163 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:29,169 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:11:29,175 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:29,175 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 22:11:29,176 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 22:11:29,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 22:11:29,176 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:11:29,176 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-20 22:11:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:29,182 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-20 22:11:29,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 22:11:29,182 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-20 22:11:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:29,183 INFO L225 Difference]: With dead ends: 114 [2018-01-20 22:11:29,184 INFO L226 Difference]: Without dead ends: 57 [2018-01-20 22:11:29,184 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 22:11:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-20 22:11:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-20 22:11:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-20 22:11:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-20 22:11:29,190 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 17 [2018-01-20 22:11:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:29,190 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-20 22:11:29,191 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 22:11:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-20 22:11:29,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 22:11:29,192 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:29,192 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:29,192 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash -178858898, now seen corresponding path program 1 times [2018-01-20 22:11:29,192 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:29,193 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:29,193 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:29,194 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:29,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:29,200 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:11:29,214 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:11:29,215 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 22:11:29,215 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 22:11:29,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 22:11:29,215 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 22:11:29,216 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 3 states. [2018-01-20 22:11:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:29,234 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2018-01-20 22:11:29,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 22:11:29,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-20 22:11:29,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:29,235 INFO L225 Difference]: With dead ends: 76 [2018-01-20 22:11:29,236 INFO L226 Difference]: Without dead ends: 61 [2018-01-20 22:11:29,236 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 22:11:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-20 22:11:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2018-01-20 22:11:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-20 22:11:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-20 22:11:29,242 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 19 [2018-01-20 22:11:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:29,243 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-20 22:11:29,243 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 22:11:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-20 22:11:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-20 22:11:29,244 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:29,244 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:29,244 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash -853032378, now seen corresponding path program 1 times [2018-01-20 22:11:29,245 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:29,245 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:29,246 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:29,246 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:29,246 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:29,261 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:11:29,287 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:29,288 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:29,302 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:29,348 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:11:29,440 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-20 22:11:29,440 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2018-01-20 22:11:29,441 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-20 22:11:29,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-20 22:11:29,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-01-20 22:11:29,441 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 8 states. [2018-01-20 22:11:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:29,631 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2018-01-20 22:11:29,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 22:11:29,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2018-01-20 22:11:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:29,657 INFO L225 Difference]: With dead ends: 129 [2018-01-20 22:11:29,657 INFO L226 Difference]: Without dead ends: 74 [2018-01-20 22:11:29,658 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:11:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-20 22:11:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2018-01-20 22:11:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-20 22:11:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-01-20 22:11:29,665 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 46 [2018-01-20 22:11:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:29,665 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-01-20 22:11:29,665 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-20 22:11:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-01-20 22:11:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-20 22:11:29,667 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:29,667 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:29,667 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1695061925, now seen corresponding path program 1 times [2018-01-20 22:11:29,668 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:29,668 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:29,669 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:29,669 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:29,669 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:29,695 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-01-20 22:11:29,784 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:29,784 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:29,792 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:29,836 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-20 22:11:29,955 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-20 22:11:29,956 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2018-01-20 22:11:29,956 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:11:29,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:11:29,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:11:29,957 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 10 states. [2018-01-20 22:11:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:30,205 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2018-01-20 22:11:30,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 22:11:30,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2018-01-20 22:11:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:30,207 INFO L225 Difference]: With dead ends: 147 [2018-01-20 22:11:30,207 INFO L226 Difference]: Without dead ends: 82 [2018-01-20 22:11:30,208 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-01-20 22:11:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-20 22:11:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2018-01-20 22:11:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-20 22:11:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2018-01-20 22:11:30,217 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 83 [2018-01-20 22:11:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:30,217 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2018-01-20 22:11:30,217 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:11:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2018-01-20 22:11:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-01-20 22:11:30,220 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:30,220 INFO L322 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:30,220 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2079106431, now seen corresponding path program 1 times [2018-01-20 22:11:30,221 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:30,221 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:30,222 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:30,222 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:30,222 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:30,258 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-01-20 22:11:30,380 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:30,380 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:30,386 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:30,458 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-01-20 22:11:30,564 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:30,565 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2018-01-20 22:11:30,565 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-20 22:11:30,566 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-20 22:11:30,566 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:11:30,566 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 12 states. [2018-01-20 22:11:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:30,806 INFO L93 Difference]: Finished difference Result 191 states and 214 transitions. [2018-01-20 22:11:30,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 22:11:30,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2018-01-20 22:11:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:30,808 INFO L225 Difference]: With dead ends: 191 [2018-01-20 22:11:30,808 INFO L226 Difference]: Without dead ends: 135 [2018-01-20 22:11:30,809 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:11:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-01-20 22:11:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 107. [2018-01-20 22:11:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-20 22:11:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2018-01-20 22:11:30,819 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 129 [2018-01-20 22:11:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:30,819 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2018-01-20 22:11:30,819 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-20 22:11:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2018-01-20 22:11:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-01-20 22:11:30,821 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:30,822 INFO L322 BasicCegarLoop]: trace histogram [11, 8, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:30,822 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash -70463565, now seen corresponding path program 2 times [2018-01-20 22:11:30,822 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:30,822 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:30,823 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:30,823 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:30,823 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:30,863 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2018-01-20 22:11:31,018 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:31,018 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:31,026 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:11:31,053 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:31,092 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:31,099 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:31,110 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 282 proven. 2 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-01-20 22:11:31,328 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:31,329 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2018-01-20 22:11:31,329 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-20 22:11:31,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-20 22:11:31,329 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-01-20 22:11:31,329 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 14 states. [2018-01-20 22:11:31,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:31,561 INFO L93 Difference]: Finished difference Result 225 states and 254 transitions. [2018-01-20 22:11:31,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 22:11:31,561 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 183 [2018-01-20 22:11:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:31,563 INFO L225 Difference]: With dead ends: 225 [2018-01-20 22:11:31,563 INFO L226 Difference]: Without dead ends: 130 [2018-01-20 22:11:31,563 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-01-20 22:11:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-20 22:11:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2018-01-20 22:11:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-20 22:11:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2018-01-20 22:11:31,574 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 183 [2018-01-20 22:11:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:31,574 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2018-01-20 22:11:31,574 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-20 22:11:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2018-01-20 22:11:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-01-20 22:11:31,576 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:31,576 INFO L322 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:31,577 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1753125657, now seen corresponding path program 3 times [2018-01-20 22:11:31,577 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:31,577 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:31,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:31,578 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:31,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:31,613 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-01-20 22:11:31,814 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:31,814 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:31,823 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:11:31,844 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:31,860 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:31,868 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:31,878 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:31,880 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:31,889 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 184 proven. 10 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2018-01-20 22:11:31,998 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:31,998 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2018-01-20 22:11:31,998 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-20 22:11:31,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-20 22:11:31,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-01-20 22:11:31,999 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand 13 states. [2018-01-20 22:11:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:32,205 INFO L93 Difference]: Finished difference Result 274 states and 316 transitions. [2018-01-20 22:11:32,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-20 22:11:32,205 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 245 [2018-01-20 22:11:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:32,208 INFO L225 Difference]: With dead ends: 274 [2018-01-20 22:11:32,208 INFO L226 Difference]: Without dead ends: 262 [2018-01-20 22:11:32,208 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2018-01-20 22:11:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-01-20 22:11:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 176. [2018-01-20 22:11:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-01-20 22:11:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 198 transitions. [2018-01-20 22:11:32,222 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 198 transitions. Word has length 245 [2018-01-20 22:11:32,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:32,223 INFO L432 AbstractCegarLoop]: Abstraction has 176 states and 198 transitions. [2018-01-20 22:11:32,223 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-20 22:11:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 198 transitions. [2018-01-20 22:11:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-01-20 22:11:32,229 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:32,229 INFO L322 BasicCegarLoop]: trace histogram [21, 17, 15, 15, 15, 15, 15, 11, 11, 11, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:32,230 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash -969187446, now seen corresponding path program 4 times [2018-01-20 22:11:32,230 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:32,230 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:32,231 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:32,231 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:32,232 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:32,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1487 trivial. 0 not checked. [2018-01-20 22:11:32,562 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:32,562 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:32,567 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:11:32,640 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:32,647 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 1018 proven. 9 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2018-01-20 22:11:32,847 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:32,848 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2018-01-20 22:11:32,848 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-20 22:11:32,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-20 22:11:32,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:11:32,849 INFO L87 Difference]: Start difference. First operand 176 states and 198 transitions. Second operand 18 states. [2018-01-20 22:11:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:33,169 INFO L93 Difference]: Finished difference Result 434 states and 540 transitions. [2018-01-20 22:11:33,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-20 22:11:33,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 316 [2018-01-20 22:11:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:33,173 INFO L225 Difference]: With dead ends: 434 [2018-01-20 22:11:33,173 INFO L226 Difference]: Without dead ends: 320 [2018-01-20 22:11:33,174 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:11:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-01-20 22:11:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 185. [2018-01-20 22:11:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-01-20 22:11:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 210 transitions. [2018-01-20 22:11:33,197 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 210 transitions. Word has length 316 [2018-01-20 22:11:33,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:33,197 INFO L432 AbstractCegarLoop]: Abstraction has 185 states and 210 transitions. [2018-01-20 22:11:33,198 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-20 22:11:33,198 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 210 transitions. [2018-01-20 22:11:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-01-20 22:11:33,201 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:33,201 INFO L322 BasicCegarLoop]: trace histogram [25, 24, 18, 18, 18, 18, 17, 17, 17, 17, 17, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:33,201 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1517871390, now seen corresponding path program 5 times [2018-01-20 22:11:33,202 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:33,202 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:33,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:33,203 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:33,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:33,260 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 2449 trivial. 0 not checked. [2018-01-20 22:11:33,630 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:33,630 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:33,635 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:11:33,665 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:33,675 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:33,679 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:33,683 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:33,690 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:33,720 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:33,837 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:33,841 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:33,849 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 1320 proven. 61 refuted. 0 times theorem prover too weak. 1229 trivial. 0 not checked. [2018-01-20 22:11:34,046 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:34,046 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2018-01-20 22:11:34,047 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-20 22:11:34,047 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-20 22:11:34,047 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2018-01-20 22:11:34,047 INFO L87 Difference]: Start difference. First operand 185 states and 210 transitions. Second operand 21 states. [2018-01-20 22:11:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:34,757 INFO L93 Difference]: Finished difference Result 370 states and 425 transitions. [2018-01-20 22:11:34,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-20 22:11:34,775 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 388 [2018-01-20 22:11:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:34,777 INFO L225 Difference]: With dead ends: 370 [2018-01-20 22:11:34,777 INFO L226 Difference]: Without dead ends: 192 [2018-01-20 22:11:34,778 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2018-01-20 22:11:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-01-20 22:11:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2018-01-20 22:11:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-01-20 22:11:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 200 transitions. [2018-01-20 22:11:34,790 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 200 transitions. Word has length 388 [2018-01-20 22:11:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:34,791 INFO L432 AbstractCegarLoop]: Abstraction has 183 states and 200 transitions. [2018-01-20 22:11:34,791 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-20 22:11:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 200 transitions. [2018-01-20 22:11:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-01-20 22:11:34,794 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:34,794 INFO L322 BasicCegarLoop]: trace histogram [29, 29, 21, 21, 21, 21, 21, 21, 21, 21, 21, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:34,794 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:34,794 INFO L82 PathProgramCache]: Analyzing trace with hash -859303758, now seen corresponding path program 6 times [2018-01-20 22:11:34,794 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:34,794 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:34,795 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:34,795 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:34,795 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:34,838 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2018-01-20 22:11:35,254 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:35,254 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:35,260 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:11:35,298 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:35,301 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:35,306 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:35,313 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:35,320 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:35,325 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:35,334 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:35,395 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:35,451 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:35,454 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:35,465 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 479 proven. 68 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2018-01-20 22:11:35,640 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:35,640 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-01-20 22:11:35,641 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-20 22:11:35,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-20 22:11:35,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:11:35,641 INFO L87 Difference]: Start difference. First operand 183 states and 200 transitions. Second operand 18 states. [2018-01-20 22:11:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:35,964 INFO L93 Difference]: Finished difference Result 402 states and 468 transitions. [2018-01-20 22:11:35,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-20 22:11:35,965 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 452 [2018-01-20 22:11:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:35,967 INFO L225 Difference]: With dead ends: 402 [2018-01-20 22:11:35,968 INFO L226 Difference]: Without dead ends: 390 [2018-01-20 22:11:35,968 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:11:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2018-01-20 22:11:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 243. [2018-01-20 22:11:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-01-20 22:11:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 273 transitions. [2018-01-20 22:11:35,988 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 273 transitions. Word has length 452 [2018-01-20 22:11:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:35,989 INFO L432 AbstractCegarLoop]: Abstraction has 243 states and 273 transitions. [2018-01-20 22:11:35,989 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-20 22:11:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 273 transitions. [2018-01-20 22:11:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2018-01-20 22:11:35,992 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:35,992 INFO L322 BasicCegarLoop]: trace histogram [39, 33, 30, 30, 30, 30, 30, 24, 24, 24, 24, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:35,992 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:35,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2121513854, now seen corresponding path program 7 times [2018-01-20 22:11:35,992 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:35,992 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:35,993 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:35,993 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:35,993 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:36,042 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 5610 trivial. 0 not checked. [2018-01-20 22:11:36,535 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:36,535 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:36,540 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:36,707 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 3223 proven. 21 refuted. 0 times theorem prover too weak. 2636 trivial. 0 not checked. [2018-01-20 22:11:37,123 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:37,124 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2018-01-20 22:11:37,124 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-20 22:11:37,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-20 22:11:37,125 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2018-01-20 22:11:37,125 INFO L87 Difference]: Start difference. First operand 243 states and 273 transitions. Second operand 23 states. [2018-01-20 22:11:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:37,603 INFO L93 Difference]: Finished difference Result 628 states and 803 transitions. [2018-01-20 22:11:37,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-20 22:11:37,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 546 [2018-01-20 22:11:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:37,606 INFO L225 Difference]: With dead ends: 628 [2018-01-20 22:11:37,606 INFO L226 Difference]: Without dead ends: 486 [2018-01-20 22:11:37,608 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 22:11:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2018-01-20 22:11:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 252. [2018-01-20 22:11:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-20 22:11:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 286 transitions. [2018-01-20 22:11:37,629 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 286 transitions. Word has length 546 [2018-01-20 22:11:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:37,629 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 286 transitions. [2018-01-20 22:11:37,630 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-20 22:11:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 286 transitions. [2018-01-20 22:11:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-01-20 22:11:37,633 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:37,633 INFO L322 BasicCegarLoop]: trace histogram [44, 43, 34, 34, 34, 34, 33, 33, 33, 33, 33, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:37,634 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:37,634 INFO L82 PathProgramCache]: Analyzing trace with hash -659879117, now seen corresponding path program 8 times [2018-01-20 22:11:37,634 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:37,634 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:37,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:37,635 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:11:37,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:37,688 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8458 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 8123 trivial. 0 not checked. [2018-01-20 22:11:38,604 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:38,604 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:38,620 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:11:38,663 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:38,765 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:38,780 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:38,790 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8458 backedges. 3905 proven. 24 refuted. 0 times theorem prover too weak. 4529 trivial. 0 not checked. [2018-01-20 22:11:39,141 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:39,141 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2018-01-20 22:11:39,142 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-20 22:11:39,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-20 22:11:39,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-01-20 22:11:39,142 INFO L87 Difference]: Start difference. First operand 252 states and 286 transitions. Second operand 23 states. [2018-01-20 22:11:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:39,533 INFO L93 Difference]: Finished difference Result 471 states and 542 transitions. [2018-01-20 22:11:39,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-20 22:11:39,534 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 639 [2018-01-20 22:11:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:39,537 INFO L225 Difference]: With dead ends: 471 [2018-01-20 22:11:39,537 INFO L226 Difference]: Without dead ends: 312 [2018-01-20 22:11:39,539 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=1111, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:11:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-01-20 22:11:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 250. [2018-01-20 22:11:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-01-20 22:11:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 275 transitions. [2018-01-20 22:11:39,565 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 275 transitions. Word has length 639 [2018-01-20 22:11:39,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:39,566 INFO L432 AbstractCegarLoop]: Abstraction has 250 states and 275 transitions. [2018-01-20 22:11:39,566 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-20 22:11:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 275 transitions. [2018-01-20 22:11:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2018-01-20 22:11:39,572 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:39,573 INFO L322 BasicCegarLoop]: trace histogram [49, 49, 38, 38, 38, 38, 38, 38, 38, 38, 38, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:39,573 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash 22721670, now seen corresponding path program 9 times [2018-01-20 22:11:39,573 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:39,573 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:39,574 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:39,574 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:39,574 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:39,656 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10802 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 10395 trivial. 0 not checked. [2018-01-20 22:11:40,506 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:40,533 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:40,538 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:11:40,597 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:40,616 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:40,626 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:40,638 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:40,670 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:40,756 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:11:40,759 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:40,778 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10802 backedges. 1136 proven. 44 refuted. 0 times theorem prover too weak. 9622 trivial. 0 not checked. [2018-01-20 22:11:41,134 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:41,134 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2018-01-20 22:11:41,135 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-20 22:11:41,135 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-20 22:11:41,135 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-01-20 22:11:41,135 INFO L87 Difference]: Start difference. First operand 250 states and 275 transitions. Second operand 21 states. [2018-01-20 22:11:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:41,608 INFO L93 Difference]: Finished difference Result 613 states and 728 transitions. [2018-01-20 22:11:41,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-20 22:11:41,609 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 714 [2018-01-20 22:11:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:41,616 INFO L225 Difference]: With dead ends: 613 [2018-01-20 22:11:41,616 INFO L226 Difference]: Without dead ends: 601 [2018-01-20 22:11:41,617 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:11:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2018-01-20 22:11:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 316. [2018-01-20 22:11:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-01-20 22:11:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 356 transitions. [2018-01-20 22:11:41,658 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 356 transitions. Word has length 714 [2018-01-20 22:11:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:41,660 INFO L432 AbstractCegarLoop]: Abstraction has 316 states and 356 transitions. [2018-01-20 22:11:41,660 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-20 22:11:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 356 transitions. [2018-01-20 22:11:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-01-20 22:11:41,667 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:41,668 INFO L322 BasicCegarLoop]: trace histogram [62, 54, 50, 50, 50, 50, 50, 42, 42, 42, 42, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:41,668 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:41,668 INFO L82 PathProgramCache]: Analyzing trace with hash -404037829, now seen corresponding path program 10 times [2018-01-20 22:11:41,669 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:41,669 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:41,669 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:41,670 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:41,670 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:41,757 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15537 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 15051 trivial. 0 not checked. [2018-01-20 22:11:42,744 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:42,744 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:42,749 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:11:42,920 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:42,931 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15537 backedges. 7749 proven. 38 refuted. 0 times theorem prover too weak. 7750 trivial. 0 not checked. [2018-01-20 22:11:43,500 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:43,500 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-20 22:11:43,500 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-20 22:11:43,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-20 22:11:43,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2018-01-20 22:11:43,501 INFO L87 Difference]: Start difference. First operand 316 states and 356 transitions. Second operand 28 states. [2018-01-20 22:11:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:44,296 INFO L93 Difference]: Finished difference Result 856 states and 1118 transitions. [2018-01-20 22:11:44,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-20 22:11:44,297 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 831 [2018-01-20 22:11:44,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:44,302 INFO L225 Difference]: With dead ends: 856 [2018-01-20 22:11:44,302 INFO L226 Difference]: Without dead ends: 686 [2018-01-20 22:11:44,305 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 820 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=376, Invalid=1604, Unknown=0, NotChecked=0, Total=1980 [2018-01-20 22:11:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2018-01-20 22:11:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 325. [2018-01-20 22:11:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-01-20 22:11:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 370 transitions. [2018-01-20 22:11:44,354 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 370 transitions. Word has length 831 [2018-01-20 22:11:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:44,355 INFO L432 AbstractCegarLoop]: Abstraction has 325 states and 370 transitions. [2018-01-20 22:11:44,355 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-20 22:11:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 370 transitions. [2018-01-20 22:11:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2018-01-20 22:11:44,364 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:44,365 INFO L322 BasicCegarLoop]: trace histogram [68, 67, 55, 55, 55, 55, 54, 54, 54, 54, 54, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:44,365 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash 824439311, now seen corresponding path program 11 times [2018-01-20 22:11:44,366 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:44,366 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:44,366 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:44,367 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:44,367 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:44,460 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20821 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 20249 trivial. 0 not checked. [2018-01-20 22:11:45,806 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:45,845 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:45,852 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:11:45,921 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:45,927 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:45,943 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:46,026 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:46,087 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:46,126 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:46,167 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:46,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:46,842 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:48,045 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:52,462 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:11:52,469 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:11:52,489 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:11:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20821 backedges. 8965 proven. 251 refuted. 0 times theorem prover too weak. 11605 trivial. 0 not checked. [2018-01-20 22:11:53,007 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:11:53,008 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2018-01-20 22:11:53,009 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-20 22:11:53,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-20 22:11:53,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2018-01-20 22:11:53,009 INFO L87 Difference]: Start difference. First operand 325 states and 370 transitions. Second operand 31 states. [2018-01-20 22:11:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:11:53,969 INFO L93 Difference]: Finished difference Result 564 states and 653 transitions. [2018-01-20 22:11:53,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-20 22:11:53,969 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 945 [2018-01-20 22:11:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:11:53,973 INFO L225 Difference]: With dead ends: 564 [2018-01-20 22:11:53,973 INFO L226 Difference]: Without dead ends: 377 [2018-01-20 22:11:53,975 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=598, Invalid=3062, Unknown=0, NotChecked=0, Total=3660 [2018-01-20 22:11:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2018-01-20 22:11:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 323. [2018-01-20 22:11:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-20 22:11:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 357 transitions. [2018-01-20 22:11:54,019 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 357 transitions. Word has length 945 [2018-01-20 22:11:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:11:54,020 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 357 transitions. [2018-01-20 22:11:54,020 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-20 22:11:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 357 transitions. [2018-01-20 22:11:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2018-01-20 22:11:54,030 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:11:54,031 INFO L322 BasicCegarLoop]: trace histogram [74, 74, 60, 60, 60, 60, 60, 60, 60, 60, 60, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:11:54,031 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:11:54,031 INFO L82 PathProgramCache]: Analyzing trace with hash 611870515, now seen corresponding path program 12 times [2018-01-20 22:11:54,031 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:11:54,031 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:11:54,032 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:54,032 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:11:54,032 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:11:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:11:54,132 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:11:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25133 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 24468 trivial. 0 not checked. [2018-01-20 22:11:55,705 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:11:55,705 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:11:55,723 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:11:55,771 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:55,775 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:55,782 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:55,790 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:55,891 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:56,022 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:56,239 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:57,124 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:11:58,234 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:00,896 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:03,365 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:07,929 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:10,575 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:12:10,581 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:12:10,597 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25133 backedges. 2113 proven. 70 refuted. 0 times theorem prover too weak. 22950 trivial. 0 not checked. [2018-01-20 22:12:11,148 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:11,148 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 25 [2018-01-20 22:12:11,149 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-20 22:12:11,149 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-20 22:12:11,149 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:12:11,149 INFO L87 Difference]: Start difference. First operand 323 states and 357 transitions. Second operand 25 states. [2018-01-20 22:12:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:12:11,639 INFO L93 Difference]: Finished difference Result 873 states and 1055 transitions. [2018-01-20 22:12:11,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-20 22:12:11,679 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1031 [2018-01-20 22:12:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:12:11,685 INFO L225 Difference]: With dead ends: 873 [2018-01-20 22:12:11,685 INFO L226 Difference]: Without dead ends: 861 [2018-01-20 22:12:11,687 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 1030 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:12:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2018-01-20 22:12:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 395. [2018-01-20 22:12:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-01-20 22:12:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 446 transitions. [2018-01-20 22:12:11,764 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 446 transitions. Word has length 1031 [2018-01-20 22:12:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:12:11,765 INFO L432 AbstractCegarLoop]: Abstraction has 395 states and 446 transitions. [2018-01-20 22:12:11,766 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-20 22:12:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 446 transitions. [2018-01-20 22:12:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1172 [2018-01-20 22:12:11,796 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:12:11,796 INFO L322 BasicCegarLoop]: trace histogram [90, 80, 75, 75, 75, 75, 75, 65, 65, 65, 65, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:12:11,796 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:12:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash 23922991, now seen corresponding path program 13 times [2018-01-20 22:12:11,797 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:12:11,797 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:12:11,798 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:11,798 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:12:11,798 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:12:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:11,915 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:12:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 33905 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 33140 trivial. 0 not checked. [2018-01-20 22:12:13,681 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:12:13,681 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:12:13,686 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:12:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:12:13,942 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:12:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 33905 backedges. 15826 proven. 60 refuted. 0 times theorem prover too weak. 18019 trivial. 0 not checked. [2018-01-20 22:12:14,765 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:12:14,765 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2018-01-20 22:12:14,766 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-20 22:12:14,766 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-20 22:12:14,766 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2018-01-20 22:12:14,767 INFO L87 Difference]: Start difference. First operand 395 states and 446 transitions. Second operand 33 states. Received shutdown request... [2018-01-20 22:12:14,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-20 22:12:14,986 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:12:14,990 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:12:14,990 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:12:14,990 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:12:14,990 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:12:14,990 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:12:14,990 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:12:14,990 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:12:14,990 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 22:12:14,991 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:12:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 22:12:14,992 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:12:14,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 10:12:14 BoogieIcfgContainer [2018-01-20 22:12:14,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 22:12:14,994 INFO L168 Benchmark]: Toolchain (without parser) took 47602.18 ms. Allocated memory was 305.1 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 266.0 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 492.5 MB. Max. memory is 5.3 GB. [2018-01-20 22:12:14,996 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 305.1 MB. Free memory is still 270.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 22:12:14,996 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.55 ms. Allocated memory is still 305.1 MB. Free memory was 266.0 MB in the beginning and 256.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:12:14,996 INFO L168 Benchmark]: Boogie Preprocessor took 31.67 ms. Allocated memory is still 305.1 MB. Free memory was 256.1 MB in the beginning and 254.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:12:14,997 INFO L168 Benchmark]: RCFGBuilder took 262.54 ms. Allocated memory is still 305.1 MB. Free memory was 254.1 MB in the beginning and 237.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:12:14,997 INFO L168 Benchmark]: TraceAbstraction took 47114.92 ms. Allocated memory was 305.1 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 235.1 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 461.6 MB. Max. memory is 5.3 GB. [2018-01-20 22:12:14,999 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 305.1 MB. Free memory is still 270.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 184.55 ms. Allocated memory is still 305.1 MB. Free memory was 266.0 MB in the beginning and 256.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 31.67 ms. Allocated memory is still 305.1 MB. Free memory was 256.1 MB in the beginning and 254.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 262.54 ms. Allocated memory is still 305.1 MB. Free memory was 254.1 MB in the beginning and 237.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 47114.92 ms. Allocated memory was 305.1 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 235.1 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 461.6 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: - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: barErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. SAFE Result, 0.3s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 17 PreInvPairs, 21 NumberOfFragments, 12 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 361 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - 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 5 procedures, 62 locations, 5 error locations. UNSAFE Result, 0.0s 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=62occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. SAFE Result, 0.7s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 175 SDtfs, 104 SDslu, 345 SDs, 0 SdLazy, 164 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 17 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 10806 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: 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 (395states) and interpolant automaton (currently 15 states, 33 states before enhancement), while ReachableStatesComputation was computing reachable states (70 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. TIMEOUT Result, 45.8s OverallTime, 17 OverallIterations, 90 TraceHistogramMax, 6.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 878 SDtfs, 2820 SDslu, 8659 SDs, 0 SdLazy, 5798 SolverSat, 683 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8072 GetRequests, 7644 SyntacticMatches, 0 SemanticMatches, 428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3078 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=395occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 1897 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 23.4s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 15474 NumberOfCodeBlocks, 13396 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 15442 ConstructedInterpolants, 0 QuantifiedInterpolants, 14613688 SizeOfPredicates, 63 NumberOfNonLiveVariables, 12247 ConjunctsInSsa, 197 ConjunctsInUnsatCore, 32 InterpolantComputations, 4 PerfectInterpolantSequences, 254942/259762 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 31). Cancelled while IsEmpty was searching accepting run (input had 62 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 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=62occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_22-12-15-006.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_22-12-15-006.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_22-12-15-006.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_22-12-15-006.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_22-12-15-006.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-4-2018-01-20_22-12-15-006.csv Completed graceful shutdown