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/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:52:29,154 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:52:29,156 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:52:29,170 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:52:29,171 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:52:29,172 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:52:29,173 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:52:29,175 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:52:29,177 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:52:29,178 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:52:29,178 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:52:29,179 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:52:29,180 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:52:29,181 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:52:29,182 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:52:29,184 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:52:29,186 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:52:29,188 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:52:29,190 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:52:29,191 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:52:29,193 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:52:29,194 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:52:29,194 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:52:29,195 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:52:29,195 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:52:29,197 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:52:29,197 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:52:29,197 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:52:29,198 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:52:29,198 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:52:29,198 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:52:29,199 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 20:52:29,207 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:52:29,207 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:52:29,208 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:52:29,208 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:52:29,208 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:52:29,208 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:52:29,208 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:52:29,209 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:52:29,209 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:52:29,209 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:52:29,209 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:52:29,210 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:52:29,210 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:52:29,210 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:52:29,210 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:52:29,210 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:52:29,210 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:52:29,210 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:52:29,210 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:52:29,211 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:52:29,211 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:52:29,211 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:52:29,211 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:52:29,211 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:52:29,212 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:52:29,212 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:52:29,212 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:52:29,212 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:52:29,212 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:52:29,212 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:52:29,212 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:52:29,213 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:52:29,213 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:52:29,213 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:52:29,213 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:52:29,214 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:52:29,214 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:52:29,246 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:52:29,257 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:52:29,260 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:52:29,262 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:52:29,262 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:52:29,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list_true-unreach-call_true-valid-memsafety.i [2018-01-24 20:52:29,412 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:52:29,417 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:52:29,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:52:29,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:52:29,423 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:52:29,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:52:29" (1/1) ... [2018-01-24 20:52:29,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d17d7d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29, skipping insertion in model container [2018-01-24 20:52:29,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:52:29" (1/1) ... [2018-01-24 20:52:29,439 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:52:29,472 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:52:29,584 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:52:29,603 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:52:29,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29 WrapperNode [2018-01-24 20:52:29,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:52:29,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:52:29,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:52:29,611 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:52:29,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29" (1/1) ... [2018-01-24 20:52:29,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29" (1/1) ... [2018-01-24 20:52:29,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29" (1/1) ... [2018-01-24 20:52:29,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29" (1/1) ... [2018-01-24 20:52:29,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29" (1/1) ... [2018-01-24 20:52:29,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29" (1/1) ... [2018-01-24 20:52:29,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29" (1/1) ... [2018-01-24 20:52:29,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:52:29,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:52:29,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:52:29,647 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:52:29,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29" (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 [2018-01-24 20:52:29,698 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:52:29,698 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:52:29,698 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-24 20:52:29,698 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:52:29,698 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:52:29,699 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:52:29,700 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-24 20:52:29,700 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:52:29,700 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:52:29,700 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:52:29,967 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:52:29,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:52:29 BoogieIcfgContainer [2018-01-24 20:52:29,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:52:29,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:52:29,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:52:29,970 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:52:29,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:52:29" (1/3) ... [2018-01-24 20:52:29,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8f94f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:52:29, skipping insertion in model container [2018-01-24 20:52:29,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:52:29" (2/3) ... [2018-01-24 20:52:29,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8f94f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:52:29, skipping insertion in model container [2018-01-24 20:52:29,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:52:29" (3/3) ... [2018-01-24 20:52:29,973 INFO L105 eAbstractionObserver]: Analyzing ICFG alternating_list_true-unreach-call_true-valid-memsafety.i [2018-01-24 20:52:29,979 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:52:29,986 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 27 error locations. [2018-01-24 20:52:30,030 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:52:30,030 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:52:30,030 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:52:30,030 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:52:30,030 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:52:30,030 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:52:30,031 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:52:30,031 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:52:30,032 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:52:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2018-01-24 20:52:30,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 20:52:30,055 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:30,056 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:52:30,056 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1444354772, now seen corresponding path program 1 times [2018-01-24 20:52:30,062 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:30,099 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:30,099 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:30,099 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:30,099 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:30,143 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:30,176 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:30,177 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:52:30,177 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:30,180 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 20:52:30,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 20:52:30,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 20:52:30,198 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 2 states. [2018-01-24 20:52:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:30,301 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2018-01-24 20:52:30,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 20:52:30,302 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-24 20:52:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:30,311 INFO L225 Difference]: With dead ends: 126 [2018-01-24 20:52:30,311 INFO L226 Difference]: Without dead ends: 73 [2018-01-24 20:52:30,315 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 [2018-01-24 20:52:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-24 20:52:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-01-24 20:52:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-24 20:52:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2018-01-24 20:52:30,349 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 12 [2018-01-24 20:52:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:30,349 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2018-01-24 20:52:30,349 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 20:52:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2018-01-24 20:52:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 20:52:30,350 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:30,350 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:52:30,350 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:30,350 INFO L82 PathProgramCache]: Analyzing trace with hash 749299640, now seen corresponding path program 1 times [2018-01-24 20:52:30,350 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:30,352 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:30,352 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:30,352 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:30,352 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:30,368 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:30,440 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:30,441 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:52:30,441 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:30,442 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:52:30,442 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:52:30,443 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:52:30,443 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 5 states. [2018-01-24 20:52:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:30,692 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2018-01-24 20:52:30,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:52:30,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-24 20:52:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:30,694 INFO L225 Difference]: With dead ends: 103 [2018-01-24 20:52:30,694 INFO L226 Difference]: Without dead ends: 91 [2018-01-24 20:52:30,695 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:52:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-24 20:52:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-01-24 20:52:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-24 20:52:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2018-01-24 20:52:30,705 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 14 [2018-01-24 20:52:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:30,705 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2018-01-24 20:52:30,706 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:52:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2018-01-24 20:52:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 20:52:30,706 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:30,706 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:52:30,707 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:30,707 INFO L82 PathProgramCache]: Analyzing trace with hash 749299641, now seen corresponding path program 1 times [2018-01-24 20:52:30,707 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:30,708 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:30,708 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:30,708 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:30,709 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:30,726 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:30,879 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:30,879 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:52:30,879 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:30,880 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:52:30,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:52:30,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:52:30,881 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 5 states. [2018-01-24 20:52:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:31,037 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2018-01-24 20:52:31,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:52:31,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-24 20:52:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:31,040 INFO L225 Difference]: With dead ends: 114 [2018-01-24 20:52:31,041 INFO L226 Difference]: Without dead ends: 102 [2018-01-24 20:52:31,041 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:52:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-01-24 20:52:31,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2018-01-24 20:52:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-24 20:52:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2018-01-24 20:52:31,053 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 14 [2018-01-24 20:52:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:31,053 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2018-01-24 20:52:31,054 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:52:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2018-01-24 20:52:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 20:52:31,055 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:31,055 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] [2018-01-24 20:52:31,055 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:31,055 INFO L82 PathProgramCache]: Analyzing trace with hash 129960215, now seen corresponding path program 1 times [2018-01-24 20:52:31,056 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:31,056 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:31,057 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:31,057 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:31,057 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:31,079 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:31,184 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:31,185 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:52:31,185 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:31,185 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:52:31,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:52:31,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:52:31,186 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand 6 states. [2018-01-24 20:52:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:31,404 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2018-01-24 20:52:31,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:52:31,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-24 20:52:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:31,406 INFO L225 Difference]: With dead ends: 134 [2018-01-24 20:52:31,406 INFO L226 Difference]: Without dead ends: 130 [2018-01-24 20:52:31,406 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:52:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-24 20:52:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2018-01-24 20:52:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-24 20:52:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2018-01-24 20:52:31,417 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 25 [2018-01-24 20:52:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:31,417 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2018-01-24 20:52:31,418 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:52:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2018-01-24 20:52:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 20:52:31,418 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:31,418 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] [2018-01-24 20:52:31,419 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:31,419 INFO L82 PathProgramCache]: Analyzing trace with hash 130009866, now seen corresponding path program 1 times [2018-01-24 20:52:31,419 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:31,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:31,420 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:31,420 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:31,420 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:31,434 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:31,482 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:31,482 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:52:31,482 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:31,483 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:52:31,483 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:52:31,483 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:52:31,483 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand 6 states. [2018-01-24 20:52:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:31,640 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2018-01-24 20:52:31,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:52:31,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-24 20:52:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:31,661 INFO L225 Difference]: With dead ends: 130 [2018-01-24 20:52:31,661 INFO L226 Difference]: Without dead ends: 129 [2018-01-24 20:52:31,662 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:52:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-01-24 20:52:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2018-01-24 20:52:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-24 20:52:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2018-01-24 20:52:31,675 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 25 [2018-01-24 20:52:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:31,675 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2018-01-24 20:52:31,675 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:52:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2018-01-24 20:52:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 20:52:31,677 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:31,677 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] [2018-01-24 20:52:31,677 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:31,677 INFO L82 PathProgramCache]: Analyzing trace with hash 130009867, now seen corresponding path program 1 times [2018-01-24 20:52:31,677 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:31,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:31,679 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:31,679 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:31,679 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:31,691 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:31,738 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:31,738 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:52:31,738 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:31,738 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:52:31,738 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:52:31,738 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:52:31,738 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 6 states. [2018-01-24 20:52:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:31,916 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2018-01-24 20:52:31,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 20:52:31,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-24 20:52:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:31,917 INFO L225 Difference]: With dead ends: 128 [2018-01-24 20:52:31,917 INFO L226 Difference]: Without dead ends: 127 [2018-01-24 20:52:31,918 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-24 20:52:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-01-24 20:52:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2018-01-24 20:52:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-24 20:52:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2018-01-24 20:52:31,927 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 25 [2018-01-24 20:52:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:31,928 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2018-01-24 20:52:31,928 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:52:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2018-01-24 20:52:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 20:52:31,929 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:31,929 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] [2018-01-24 20:52:31,930 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:31,930 INFO L82 PathProgramCache]: Analyzing trace with hash 825919103, now seen corresponding path program 1 times [2018-01-24 20:52:31,930 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:31,931 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:31,931 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:31,932 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:31,932 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:31,942 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:31,972 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:31,973 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:52:31,973 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:31,973 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:52:31,973 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:52:31,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:52:31,974 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand 3 states. [2018-01-24 20:52:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:32,002 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2018-01-24 20:52:32,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:52:32,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-01-24 20:52:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:32,004 INFO L225 Difference]: With dead ends: 270 [2018-01-24 20:52:32,004 INFO L226 Difference]: Without dead ends: 175 [2018-01-24 20:52:32,005 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 [2018-01-24 20:52:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-24 20:52:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 135. [2018-01-24 20:52:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-01-24 20:52:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2018-01-24 20:52:32,017 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 25 [2018-01-24 20:52:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:32,018 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2018-01-24 20:52:32,018 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:52:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2018-01-24 20:52:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 20:52:32,019 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:32,019 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] [2018-01-24 20:52:32,019 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:32,019 INFO L82 PathProgramCache]: Analyzing trace with hash 245290165, now seen corresponding path program 1 times [2018-01-24 20:52:32,019 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:32,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:32,020 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:32,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:32,021 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:32,032 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:32,119 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:32,119 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:52:32,119 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:32,119 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:52:32,120 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:52:32,120 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:52:32,120 INFO L87 Difference]: Start difference. First operand 135 states and 161 transitions. Second operand 6 states. [2018-01-24 20:52:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:32,281 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2018-01-24 20:52:32,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:52:32,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-24 20:52:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:32,283 INFO L225 Difference]: With dead ends: 186 [2018-01-24 20:52:32,283 INFO L226 Difference]: Without dead ends: 139 [2018-01-24 20:52:32,284 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:52:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-01-24 20:52:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2018-01-24 20:52:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-24 20:52:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2018-01-24 20:52:32,296 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 25 [2018-01-24 20:52:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:32,297 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2018-01-24 20:52:32,297 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:52:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2018-01-24 20:52:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:52:32,297 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:32,297 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] [2018-01-24 20:52:32,298 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:32,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1978391014, now seen corresponding path program 1 times [2018-01-24 20:52:32,298 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:32,298 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:32,299 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:32,299 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:32,299 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:32,307 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:32,368 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:32,368 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:52:32,369 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:32,369 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:52:32,369 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:52:32,369 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:52:32,370 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 7 states. [2018-01-24 20:52:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:32,506 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2018-01-24 20:52:32,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 20:52:32,506 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-24 20:52:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:32,507 INFO L225 Difference]: With dead ends: 118 [2018-01-24 20:52:32,507 INFO L226 Difference]: Without dead ends: 115 [2018-01-24 20:52:32,508 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-01-24 20:52:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-24 20:52:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-01-24 20:52:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-24 20:52:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2018-01-24 20:52:32,515 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 26 [2018-01-24 20:52:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:32,515 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2018-01-24 20:52:32,515 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:52:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2018-01-24 20:52:32,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:52:32,516 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:32,516 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] [2018-01-24 20:52:32,516 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:32,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1978391015, now seen corresponding path program 1 times [2018-01-24 20:52:32,516 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:32,517 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:32,518 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:32,518 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:32,518 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:32,535 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:32,641 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:32,641 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:52:32,641 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:32,641 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:52:32,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:52:32,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:52:32,642 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 7 states. [2018-01-24 20:52:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:32,890 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2018-01-24 20:52:32,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:52:32,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-24 20:52:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:32,891 INFO L225 Difference]: With dead ends: 131 [2018-01-24 20:52:32,891 INFO L226 Difference]: Without dead ends: 126 [2018-01-24 20:52:32,892 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:52:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-01-24 20:52:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2018-01-24 20:52:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-01-24 20:52:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2018-01-24 20:52:32,899 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 26 [2018-01-24 20:52:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:32,900 INFO L432 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2018-01-24 20:52:32,900 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:52:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2018-01-24 20:52:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 20:52:32,900 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:32,900 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] [2018-01-24 20:52:32,900 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash 385432044, now seen corresponding path program 1 times [2018-01-24 20:52:32,901 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:32,901 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:32,902 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:32,902 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:32,902 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:32,912 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:32,955 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:52:32,955 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:52:32,955 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:52:32,955 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:52:32,955 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:52:32,956 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:52:32,956 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 7 states. [2018-01-24 20:52:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:52:33,098 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2018-01-24 20:52:33,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 20:52:33,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-01-24 20:52:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:52:33,099 INFO L225 Difference]: With dead ends: 138 [2018-01-24 20:52:33,099 INFO L226 Difference]: Without dead ends: 111 [2018-01-24 20:52:33,100 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-01-24 20:52:33,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-24 20:52:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2018-01-24 20:52:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-24 20:52:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2018-01-24 20:52:33,105 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 27 [2018-01-24 20:52:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:52:33,106 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2018-01-24 20:52:33,106 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:52:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2018-01-24 20:52:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-24 20:52:33,106 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:52:33,107 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] [2018-01-24 20:52:33,107 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:52:33,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1053625897, now seen corresponding path program 1 times [2018-01-24 20:52:33,107 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:52:33,108 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:33,108 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:52:33,108 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:52:33,108 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:52:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:52:33,124 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:52:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:52:33,539 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:52:33,539 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:52:33,541 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-01-24 20:52:33,543 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [14], [16], [19], [21], [24], [25], [28], [36], [37], [43], [45], [48], [51], [55], [58], [62], [64], [69], [101], [105], [107], [112], [125], [128], [131], [136], [137], [145], [146], [147] [2018-01-24 20:52:33,602 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:52:33,602 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown