java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label12_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:19:11,068 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:19:11,070 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:19:11,087 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:19:11,087 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:19:11,089 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:19:11,091 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:19:11,093 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:19:11,094 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:19:11,096 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:19:11,097 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:19:11,097 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:19:11,098 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:19:11,099 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:19:11,101 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:19:11,104 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:19:11,105 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:19:11,116 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:19:11,118 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:19:11,119 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:19:11,124 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:19:11,126 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:19:11,129 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 08:19:11,130 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 08:19:11,130 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 08:19:11,132 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 08:19:11,134 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 08:19:11,136 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 08:19:11,137 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 08:19:11,138 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 08:19:11,138 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 08:19:11,139 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 08:19:11,139 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 08:19:11,139 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 08:19:11,142 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 08:19:11,143 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 08:19:11,143 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:19:11,168 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:19:11,168 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:19:11,169 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:19:11,169 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:19:11,170 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:19:11,172 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:19:11,172 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:19:11,174 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:19:11,174 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:19:11,174 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:19:11,174 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:19:11,174 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:19:11,175 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:19:11,175 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:19:11,176 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:19:11,176 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:19:11,176 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:19:11,176 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:19:11,176 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:19:11,176 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:19:11,177 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:19:11,177 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:19:11,177 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:19:11,177 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:19:11,178 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:19:11,178 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:19:11,178 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:19:11,178 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:19:11,178 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:19:11,179 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:19:11,179 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:19:11,179 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:19:11,179 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:19:11,179 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:19:11,180 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:19:11,180 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:19:11,227 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:19:11,247 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:19:11,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:19:11,253 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:19:11,254 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:19:11,254 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label12_true-unreach-call.c [2018-10-27 08:19:11,325 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d705cff6c/fd75142b52744182899060dba4d9086c/FLAG05e6b8582 [2018-10-27 08:19:11,952 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:19:11,954 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label12_true-unreach-call.c [2018-10-27 08:19:11,974 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d705cff6c/fd75142b52744182899060dba4d9086c/FLAG05e6b8582 [2018-10-27 08:19:11,993 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d705cff6c/fd75142b52744182899060dba4d9086c [2018-10-27 08:19:12,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:19:12,005 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:19:12,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:19:12,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:19:12,010 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:19:12,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:19:11" (1/1) ... [2018-10-27 08:19:12,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a20ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:12, skipping insertion in model container [2018-10-27 08:19:12,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:19:11" (1/1) ... [2018-10-27 08:19:12,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:19:12,112 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:19:12,734 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:19:12,738 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:19:13,026 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:19:13,049 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:19:13,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13 WrapperNode [2018-10-27 08:19:13,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:19:13,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:19:13,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:19:13,051 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:19:13,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... [2018-10-27 08:19:13,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... [2018-10-27 08:19:13,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:19:13,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:19:13,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:19:13,384 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:19:13,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... [2018-10-27 08:19:13,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... [2018-10-27 08:19:13,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... [2018-10-27 08:19:13,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... [2018-10-27 08:19:13,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... [2018-10-27 08:19:13,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... [2018-10-27 08:19:13,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... [2018-10-27 08:19:13,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:19:13,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:19:13,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:19:13,571 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:19:13,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:19:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:19:13,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:19:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:19:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:19:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:19:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:19:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:19:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:19:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:19:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:19:20,443 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:19:20,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:19:20 BoogieIcfgContainer [2018-10-27 08:19:20,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:19:20,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:19:20,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:19:20,449 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:19:20,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:19:11" (1/3) ... [2018-10-27 08:19:20,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6fff1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:19:20, skipping insertion in model container [2018-10-27 08:19:20,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:19:13" (2/3) ... [2018-10-27 08:19:20,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6fff1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:19:20, skipping insertion in model container [2018-10-27 08:19:20,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:19:20" (3/3) ... [2018-10-27 08:19:20,453 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label12_true-unreach-call.c [2018-10-27 08:19:20,463 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:19:20,471 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:19:20,489 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:19:20,531 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:19:20,532 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:19:20,532 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:19:20,532 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:19:20,532 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:19:20,533 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:19:20,533 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:19:20,533 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:19:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-10-27 08:19:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-27 08:19:20,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:19:20,579 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:19:20,581 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:19:20,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:19:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash 806508676, now seen corresponding path program 1 times [2018-10-27 08:19:20,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:19:20,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:20,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:19:20,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:20,644 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:19:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:19:21,031 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:19:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:19:21,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:19:21,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 08:19:21,159 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:19:21,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:19:21,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:19:21,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:19:21,187 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-10-27 08:19:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:19:28,538 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-10-27 08:19:28,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:19:28,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2018-10-27 08:19:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:19:28,564 INFO L225 Difference]: With dead ends: 1156 [2018-10-27 08:19:28,564 INFO L226 Difference]: Without dead ends: 744 [2018-10-27 08:19:28,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:19:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-10-27 08:19:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-10-27 08:19:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-10-27 08:19:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1355 transitions. [2018-10-27 08:19:28,682 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1355 transitions. Word has length 46 [2018-10-27 08:19:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:19:28,683 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 1355 transitions. [2018-10-27 08:19:28,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:19:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1355 transitions. [2018-10-27 08:19:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-27 08:19:28,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:19:28,691 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:19:28,691 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:19:28,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:19:28,692 INFO L82 PathProgramCache]: Analyzing trace with hash 875777906, now seen corresponding path program 1 times [2018-10-27 08:19:28,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:19:28,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:28,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:19:28,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:28,694 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:19:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:19:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:19:28,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:19:28,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 08:19:28,993 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:19:28,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 08:19:28,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 08:19:28,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 08:19:28,996 INFO L87 Difference]: Start difference. First operand 744 states and 1355 transitions. Second operand 5 states. [2018-10-27 08:19:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:19:35,324 INFO L93 Difference]: Finished difference Result 2194 states and 4083 transitions. [2018-10-27 08:19:35,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:19:35,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2018-10-27 08:19:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:19:35,346 INFO L225 Difference]: With dead ends: 2194 [2018-10-27 08:19:35,347 INFO L226 Difference]: Without dead ends: 1456 [2018-10-27 08:19:35,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:19:35,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2018-10-27 08:19:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1436. [2018-10-27 08:19:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2018-10-27 08:19:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2550 transitions. [2018-10-27 08:19:35,431 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2550 transitions. Word has length 116 [2018-10-27 08:19:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:19:35,432 INFO L481 AbstractCegarLoop]: Abstraction has 1436 states and 2550 transitions. [2018-10-27 08:19:35,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 08:19:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2550 transitions. [2018-10-27 08:19:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-27 08:19:35,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:19:35,439 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:19:35,439 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:19:35,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:19:35,445 INFO L82 PathProgramCache]: Analyzing trace with hash -545095373, now seen corresponding path program 1 times [2018-10-27 08:19:35,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:19:35,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:35,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:19:35,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:35,448 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:19:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:19:35,783 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:19:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:19:36,163 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:19:36,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:19:36,164 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:19:36,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:19:36,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:19:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:19:36,167 INFO L87 Difference]: Start difference. First operand 1436 states and 2550 transitions. Second operand 6 states. [2018-10-27 08:19:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:19:43,182 INFO L93 Difference]: Finished difference Result 4276 states and 7656 transitions. [2018-10-27 08:19:43,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:19:43,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-10-27 08:19:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:19:43,208 INFO L225 Difference]: With dead ends: 4276 [2018-10-27 08:19:43,209 INFO L226 Difference]: Without dead ends: 2846 [2018-10-27 08:19:43,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:19:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2018-10-27 08:19:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2819. [2018-10-27 08:19:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2018-10-27 08:19:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4619 transitions. [2018-10-27 08:19:43,319 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4619 transitions. Word has length 145 [2018-10-27 08:19:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:19:43,319 INFO L481 AbstractCegarLoop]: Abstraction has 2819 states and 4619 transitions. [2018-10-27 08:19:43,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:19:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4619 transitions. [2018-10-27 08:19:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-27 08:19:43,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:19:43,326 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:19:43,326 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:19:43,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:19:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1167752721, now seen corresponding path program 1 times [2018-10-27 08:19:43,327 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:19:43,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:43,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:19:43,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:43,329 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:19:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:19:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:19:43,607 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:19:43,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:19:43,607 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:19:43,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:19:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:19:43,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:19:43,609 INFO L87 Difference]: Start difference. First operand 2819 states and 4619 transitions. Second operand 6 states. [2018-10-27 08:19:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:19:48,034 INFO L93 Difference]: Finished difference Result 6735 states and 11188 transitions. [2018-10-27 08:19:48,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:19:48,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2018-10-27 08:19:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:19:48,064 INFO L225 Difference]: With dead ends: 6735 [2018-10-27 08:19:48,064 INFO L226 Difference]: Without dead ends: 3922 [2018-10-27 08:19:48,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:19:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2018-10-27 08:19:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 3885. [2018-10-27 08:19:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3885 states. [2018-10-27 08:19:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5442 transitions. [2018-10-27 08:19:48,200 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5442 transitions. Word has length 163 [2018-10-27 08:19:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:19:48,201 INFO L481 AbstractCegarLoop]: Abstraction has 3885 states and 5442 transitions. [2018-10-27 08:19:48,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:19:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5442 transitions. [2018-10-27 08:19:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-27 08:19:48,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:19:48,206 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:19:48,206 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:19:48,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:19:48,206 INFO L82 PathProgramCache]: Analyzing trace with hash 874866507, now seen corresponding path program 1 times [2018-10-27 08:19:48,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:19:48,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:48,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:19:48,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:48,208 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:19:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:19:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:19:48,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:19:48,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:19:48,502 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:19:48,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:19:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:19:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:19:48,503 INFO L87 Difference]: Start difference. First operand 3885 states and 5442 transitions. Second operand 4 states. [2018-10-27 08:19:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:19:52,249 INFO L93 Difference]: Finished difference Result 8804 states and 12434 transitions. [2018-10-27 08:19:52,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:19:52,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 229 [2018-10-27 08:19:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:19:52,279 INFO L225 Difference]: With dead ends: 8804 [2018-10-27 08:19:52,280 INFO L226 Difference]: Without dead ends: 4925 [2018-10-27 08:19:52,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:19:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2018-10-27 08:19:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 4925. [2018-10-27 08:19:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4925 states. [2018-10-27 08:19:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4925 states to 4925 states and 6610 transitions. [2018-10-27 08:19:52,432 INFO L78 Accepts]: Start accepts. Automaton has 4925 states and 6610 transitions. Word has length 229 [2018-10-27 08:19:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:19:52,433 INFO L481 AbstractCegarLoop]: Abstraction has 4925 states and 6610 transitions. [2018-10-27 08:19:52,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:19:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4925 states and 6610 transitions. [2018-10-27 08:19:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-10-27 08:19:52,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:19:52,442 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:19:52,443 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:19:52,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:19:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1028530099, now seen corresponding path program 1 times [2018-10-27 08:19:52,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:19:52,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:52,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:19:52,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:19:52,445 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:19:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:19:53,149 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2018-10-27 08:19:53,370 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2018-10-27 08:19:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 221 proven. 69 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-10-27 08:19:53,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:19:53,843 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:19:53,844 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: [2018-10-27 08:19:53,846 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [447], [449], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:19:53,905 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:19:53,905 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:19:54,544 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:19:54,547 INFO L272 AbstractInterpreter]: Visited 136 different actions 136 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 08:19:54,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:19:54,592 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:19:55,367 INFO L227 lantSequenceWeakener]: Weakened 335 states. On average, predicates are now at 77.71% of their original sizes. [2018-10-27 08:19:55,367 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:19:55,647 INFO L415 sIntCurrentIteration]: We unified 346 AI predicates to 346 [2018-10-27 08:19:55,647 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:19:55,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:19:55,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2018-10-27 08:19:55,648 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:19:55,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:19:55,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:19:55,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:19:55,650 INFO L87 Difference]: Start difference. First operand 4925 states and 6610 transitions. Second operand 6 states. [2018-10-27 08:21:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:21:25,857 INFO L93 Difference]: Finished difference Result 10184 states and 13592 transitions. [2018-10-27 08:21:25,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:21:25,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 347 [2018-10-27 08:21:25,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:21:25,879 INFO L225 Difference]: With dead ends: 10184 [2018-10-27 08:21:25,880 INFO L226 Difference]: Without dead ends: 5265 [2018-10-27 08:21:25,897 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 347 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:21:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2018-10-27 08:21:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2018-10-27 08:21:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2018-10-27 08:21:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 6956 transitions. [2018-10-27 08:21:26,035 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 6956 transitions. Word has length 347 [2018-10-27 08:21:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:21:26,036 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 6956 transitions. [2018-10-27 08:21:26,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:21:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 6956 transitions. [2018-10-27 08:21:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-10-27 08:21:26,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:21:26,051 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:21:26,051 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:21:26,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:21:26,052 INFO L82 PathProgramCache]: Analyzing trace with hash -194390703, now seen corresponding path program 1 times [2018-10-27 08:21:26,052 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:21:26,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:26,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:21:26,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:26,054 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:21:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:21:26,395 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-27 08:21:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 236 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-27 08:21:26,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:21:26,899 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:21:26,899 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 440 with the following transitions: [2018-10-27 08:21:26,899 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [447], [449], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:21:26,905 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:21:26,906 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:21:27,315 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:21:27,315 INFO L272 AbstractInterpreter]: Visited 141 different actions 555 times. Merged at 8 different actions 27 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-27 08:21:27,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:21:27,347 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:21:27,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:21:27,347 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:21:27,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:21:27,364 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:21:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:21:27,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:21:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 499 proven. 2 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-27 08:21:28,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:21:28,755 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-27 08:21:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 256 proven. 167 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-10-27 08:21:29,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:21:29,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2018-10-27 08:21:29,130 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:21:29,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 08:21:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 08:21:29,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-10-27 08:21:29,132 INFO L87 Difference]: Start difference. First operand 5263 states and 6956 transitions. Second operand 10 states. [2018-10-27 08:21:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:21:39,411 INFO L93 Difference]: Finished difference Result 14971 states and 20114 transitions. [2018-10-27 08:21:39,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-27 08:21:39,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 439 [2018-10-27 08:21:39,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:21:39,457 INFO L225 Difference]: With dead ends: 14971 [2018-10-27 08:21:39,458 INFO L226 Difference]: Without dead ends: 7942 [2018-10-27 08:21:39,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 911 GetRequests, 886 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-10-27 08:21:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7942 states. [2018-10-27 08:21:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7942 to 7938. [2018-10-27 08:21:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7938 states. [2018-10-27 08:21:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7938 states to 7938 states and 8771 transitions. [2018-10-27 08:21:39,765 INFO L78 Accepts]: Start accepts. Automaton has 7938 states and 8771 transitions. Word has length 439 [2018-10-27 08:21:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:21:39,765 INFO L481 AbstractCegarLoop]: Abstraction has 7938 states and 8771 transitions. [2018-10-27 08:21:39,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 08:21:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 7938 states and 8771 transitions. [2018-10-27 08:21:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2018-10-27 08:21:39,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:21:39,781 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:21:39,781 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:21:39,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:21:39,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1107811102, now seen corresponding path program 1 times [2018-10-27 08:21:39,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:21:39,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:39,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:21:39,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:39,783 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:21:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:21:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 218 proven. 37 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-27 08:21:40,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:21:40,435 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:21:40,435 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 487 with the following transitions: [2018-10-27 08:21:40,436 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [447], [449], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:21:40,450 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:21:40,450 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:21:41,145 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:21:41,145 INFO L272 AbstractInterpreter]: Visited 250 different actions 745 times. Merged at 8 different actions 19 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 08:21:41,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:21:41,184 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:21:41,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:21:41,184 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:21:41,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:21:41,201 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:21:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:21:41,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:21:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-27 08:21:41,626 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:21:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-27 08:21:42,343 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:21:42,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-10-27 08:21:42,344 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:21:42,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:21:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:21:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:21:42,346 INFO L87 Difference]: Start difference. First operand 7938 states and 8771 transitions. Second operand 3 states. [2018-10-27 08:21:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:21:43,950 INFO L93 Difference]: Finished difference Result 13826 states and 15369 transitions. [2018-10-27 08:21:43,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:21:43,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2018-10-27 08:21:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:21:43,973 INFO L225 Difference]: With dead ends: 13826 [2018-10-27 08:21:43,973 INFO L226 Difference]: Without dead ends: 7938 [2018-10-27 08:21:43,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 973 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:21:43,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7938 states. [2018-10-27 08:21:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7938 to 7938. [2018-10-27 08:21:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7938 states. [2018-10-27 08:21:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7938 states to 7938 states and 8661 transitions. [2018-10-27 08:21:44,141 INFO L78 Accepts]: Start accepts. Automaton has 7938 states and 8661 transitions. Word has length 486 [2018-10-27 08:21:44,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:21:44,143 INFO L481 AbstractCegarLoop]: Abstraction has 7938 states and 8661 transitions. [2018-10-27 08:21:44,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:21:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7938 states and 8661 transitions. [2018-10-27 08:21:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2018-10-27 08:21:44,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:21:44,177 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:21:44,178 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:21:44,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:21:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1390233254, now seen corresponding path program 1 times [2018-10-27 08:21:44,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:21:44,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:44,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:21:44,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:44,181 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:21:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:21:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-10-27 08:21:44,885 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:21:44,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 08:21:44,885 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:21:44,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:21:44,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:21:44,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:21:44,887 INFO L87 Difference]: Start difference. First operand 7938 states and 8661 transitions. Second operand 3 states. [2018-10-27 08:21:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:21:47,050 INFO L93 Difference]: Finished difference Result 21622 states and 23828 transitions. [2018-10-27 08:21:47,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:21:47,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 774 [2018-10-27 08:21:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:21:47,096 INFO L225 Difference]: With dead ends: 21622 [2018-10-27 08:21:47,097 INFO L226 Difference]: Without dead ends: 13689 [2018-10-27 08:21:47,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:21:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2018-10-27 08:21:47,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 13013. [2018-10-27 08:21:47,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13013 states. [2018-10-27 08:21:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13013 states to 13013 states and 14060 transitions. [2018-10-27 08:21:47,384 INFO L78 Accepts]: Start accepts. Automaton has 13013 states and 14060 transitions. Word has length 774 [2018-10-27 08:21:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:21:47,385 INFO L481 AbstractCegarLoop]: Abstraction has 13013 states and 14060 transitions. [2018-10-27 08:21:47,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:21:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 13013 states and 14060 transitions. [2018-10-27 08:21:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2018-10-27 08:21:47,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:21:47,434 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:21:47,434 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:21:47,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:21:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash -597092522, now seen corresponding path program 1 times [2018-10-27 08:21:47,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:21:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:47,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:21:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:47,437 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:21:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:21:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 448 proven. 223 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-27 08:21:49,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:21:49,012 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:21:49,012 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 843 with the following transitions: [2018-10-27 08:21:49,013 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [447], [449], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1188], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:21:49,018 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:21:49,018 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:21:49,964 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:21:49,964 INFO L272 AbstractInterpreter]: Visited 252 different actions 1008 times. Merged at 10 different actions 35 times. Never widened. Found 8 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-27 08:21:50,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:21:50,001 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:21:50,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:21:50,001 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:21:50,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:21:50,015 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:21:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:21:50,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:21:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 1126 proven. 2 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2018-10-27 08:21:50,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:21:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 448 proven. 223 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-27 08:21:51,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:21:51,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 08:21:51,693 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:21:51,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:21:51,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:21:51,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:21:51,696 INFO L87 Difference]: Start difference. First operand 13013 states and 14060 transitions. Second operand 9 states. [2018-10-27 08:21:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:21:57,584 INFO L93 Difference]: Finished difference Result 29672 states and 32894 transitions. [2018-10-27 08:21:57,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 08:21:57,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 842 [2018-10-27 08:21:57,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:21:57,661 INFO L225 Difference]: With dead ends: 29672 [2018-10-27 08:21:57,662 INFO L226 Difference]: Without dead ends: 16305 [2018-10-27 08:21:57,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1705 GetRequests, 1687 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2018-10-27 08:21:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16305 states. [2018-10-27 08:21:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16305 to 16263. [2018-10-27 08:21:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16263 states. [2018-10-27 08:21:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16263 states to 16263 states and 17704 transitions. [2018-10-27 08:21:58,067 INFO L78 Accepts]: Start accepts. Automaton has 16263 states and 17704 transitions. Word has length 842 [2018-10-27 08:21:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:21:58,068 INFO L481 AbstractCegarLoop]: Abstraction has 16263 states and 17704 transitions. [2018-10-27 08:21:58,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:21:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 16263 states and 17704 transitions. [2018-10-27 08:21:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2018-10-27 08:21:58,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:21:58,109 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:21:58,109 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:21:58,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:21:58,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1273293434, now seen corresponding path program 1 times [2018-10-27 08:21:58,110 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:21:58,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:58,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:21:58,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:21:58,112 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:21:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:22:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 228 proven. 1106 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2018-10-27 08:22:01,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:22:01,750 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:22:01,750 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1077 with the following transitions: [2018-10-27 08:22:01,751 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [137], [179], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [447], [449], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [776], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1392], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1445], [1449], [1453], [1457], [1461], [1465], [1469], [1473], [1477], [1481], [1485], [1489], [1493], [1497], [1501], [1505], [1509], [1513], [1517], [1521], [1525], [1529], [1533], [1537], [1541], [1545], [1549], [1551], [1552], [1556], [1560], [1566], [1570], [1572], [1577], [1578], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:22:01,757 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:22:01,758 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:22:05,088 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:22:05,088 INFO L272 AbstractInterpreter]: Visited 336 different actions 666 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:22:05,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:22:05,093 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:22:07,595 INFO L227 lantSequenceWeakener]: Weakened 1070 states. On average, predicates are now at 77.45% of their original sizes. [2018-10-27 08:22:07,595 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:22:07,776 INFO L415 sIntCurrentIteration]: We unified 1075 AI predicates to 1075 [2018-10-27 08:22:07,776 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:22:07,776 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:22:07,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2018-10-27 08:22:07,780 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:22:07,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 08:22:07,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 08:22:07,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-27 08:22:07,782 INFO L87 Difference]: Start difference. First operand 16263 states and 17704 transitions. Second operand 12 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown