java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:25,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:25,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:25,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:25,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:25,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:25,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:25,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:25,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:25,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:25,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:25,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:25,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:25,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:25,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:25,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:25,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:25,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:25,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:25,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:25,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:25,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:25,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:25,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:25,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:05:25,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:25,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:25,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:25,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:25,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:25,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:25,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:25,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:25,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:25,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:25,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:25,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:05:25,479 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:25,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:25,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:25,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:25,481 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:25,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:25,481 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:25,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:25,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:25,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:25,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:25,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:25,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:25,482 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:25,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:25,483 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:25,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:25,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:25,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:25,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:25,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:25,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:25,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:25,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:25,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:25,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:25,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:25,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:25,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:05:25,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:25,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:25,772 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:25,774 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:25,774 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:25,775 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label12.c [2019-10-13 20:05:25,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4fb69f0/bfade7ec78614feeb0ee66cbedb0df4a/FLAGb98b7f49e [2019-10-13 20:05:26,598 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:26,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label12.c [2019-10-13 20:05:26,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4fb69f0/bfade7ec78614feeb0ee66cbedb0df4a/FLAGb98b7f49e [2019-10-13 20:05:26,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4fb69f0/bfade7ec78614feeb0ee66cbedb0df4a [2019-10-13 20:05:26,710 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:26,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:26,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:26,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:26,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:26,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:26" (1/1) ... [2019-10-13 20:05:26,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb7c29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:26, skipping insertion in model container [2019-10-13 20:05:26,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:26" (1/1) ... [2019-10-13 20:05:26,731 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:26,875 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:28,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:28,370 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:29,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:29,103 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:29,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29 WrapperNode [2019-10-13 20:05:29,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:29,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:29,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:29,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:29,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29" (1/1) ... [2019-10-13 20:05:29,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29" (1/1) ... [2019-10-13 20:05:29,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29" (1/1) ... [2019-10-13 20:05:29,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29" (1/1) ... [2019-10-13 20:05:29,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29" (1/1) ... [2019-10-13 20:05:29,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29" (1/1) ... [2019-10-13 20:05:29,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29" (1/1) ... [2019-10-13 20:05:29,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:29,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:29,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:29,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:29,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29" (1/1) ... No working directory specified, using /storage/repos/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 [2019-10-13 20:05:29,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:29,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:29,478 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:29,478 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:05:29,478 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:05:29,478 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 20:05:29,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:29,479 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:29,479 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:05:29,479 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:05:29,479 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 20:05:29,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:29,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:29,480 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:29,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:29,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:29,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:34,301 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:34,301 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:34,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:34 BoogieIcfgContainer [2019-10-13 20:05:34,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:34,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:34,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:34,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:34,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:26" (1/3) ... [2019-10-13 20:05:34,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3154d10a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:34, skipping insertion in model container [2019-10-13 20:05:34,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:29" (2/3) ... [2019-10-13 20:05:34,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3154d10a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:34, skipping insertion in model container [2019-10-13 20:05:34,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:34" (3/3) ... [2019-10-13 20:05:34,325 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label12.c [2019-10-13 20:05:34,348 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:34,362 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:34,378 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:34,421 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:34,421 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:34,421 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:34,421 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:34,422 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:34,422 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:34,422 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:34,422 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 20:05:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 20:05:34,475 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:34,476 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:34,478 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:34,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1107355747, now seen corresponding path program 1 times [2019-10-13 20:05:34,494 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:34,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366274430] [2019-10-13 20:05:34,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:34,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:34,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:34,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366274430] [2019-10-13 20:05:34,874 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:34,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:05:34,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060756275] [2019-10-13 20:05:34,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:34,882 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:34,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:34,899 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-13 20:05:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:39,888 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-10-13 20:05:39,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:39,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-10-13 20:05:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:39,924 INFO L225 Difference]: With dead ends: 2443 [2019-10-13 20:05:39,924 INFO L226 Difference]: Without dead ends: 1542 [2019-10-13 20:05:39,934 INFO L600 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 [2019-10-13 20:05:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-13 20:05:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-13 20:05:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-13 20:05:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2750 transitions. [2019-10-13 20:05:40,080 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2750 transitions. Word has length 64 [2019-10-13 20:05:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:40,083 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2750 transitions. [2019-10-13 20:05:40,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2750 transitions. [2019-10-13 20:05:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 20:05:40,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:40,100 INFO L380 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, 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] [2019-10-13 20:05:40,100 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:40,103 INFO L82 PathProgramCache]: Analyzing trace with hash -493202935, now seen corresponding path program 1 times [2019-10-13 20:05:40,103 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:40,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223679313] [2019-10-13 20:05:40,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:40,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:40,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:40,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223679313] [2019-10-13 20:05:40,369 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:40,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:05:40,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348160180] [2019-10-13 20:05:40,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:05:40,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:05:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:05:40,372 INFO L87 Difference]: Start difference. First operand 1542 states and 2750 transitions. Second operand 5 states. [2019-10-13 20:05:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:47,200 INFO L93 Difference]: Finished difference Result 4690 states and 8403 transitions. [2019-10-13 20:05:47,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:47,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2019-10-13 20:05:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:47,230 INFO L225 Difference]: With dead ends: 4690 [2019-10-13 20:05:47,230 INFO L226 Difference]: Without dead ends: 3154 [2019-10-13 20:05:47,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:05:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2019-10-13 20:05:47,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 3122. [2019-10-13 20:05:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3122 states. [2019-10-13 20:05:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 5336 transitions. [2019-10-13 20:05:47,361 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 5336 transitions. Word has length 137 [2019-10-13 20:05:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:47,363 INFO L462 AbstractCegarLoop]: Abstraction has 3122 states and 5336 transitions. [2019-10-13 20:05:47,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:05:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 5336 transitions. [2019-10-13 20:05:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 20:05:47,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:47,369 INFO L380 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, 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] [2019-10-13 20:05:47,370 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:47,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1291094684, now seen corresponding path program 1 times [2019-10-13 20:05:47,371 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:47,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494797165] [2019-10-13 20:05:47,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:47,373 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:47,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:47,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494797165] [2019-10-13 20:05:47,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:47,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:47,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103348566] [2019-10-13 20:05:47,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:47,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:47,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:47,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:47,623 INFO L87 Difference]: Start difference. First operand 3122 states and 5336 transitions. Second operand 6 states. [2019-10-13 20:05:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:55,132 INFO L93 Difference]: Finished difference Result 9491 states and 16483 transitions. [2019-10-13 20:05:55,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:55,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-13 20:05:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:55,168 INFO L225 Difference]: With dead ends: 9491 [2019-10-13 20:05:55,168 INFO L226 Difference]: Without dead ends: 6375 [2019-10-13 20:05:55,177 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:05:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2019-10-13 20:05:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6333. [2019-10-13 20:05:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6333 states. [2019-10-13 20:05:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6333 states to 6333 states and 10771 transitions. [2019-10-13 20:05:55,370 INFO L78 Accepts]: Start accepts. Automaton has 6333 states and 10771 transitions. Word has length 142 [2019-10-13 20:05:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:55,375 INFO L462 AbstractCegarLoop]: Abstraction has 6333 states and 10771 transitions. [2019-10-13 20:05:55,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6333 states and 10771 transitions. [2019-10-13 20:05:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 20:05:55,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:55,379 INFO L380 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, 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] [2019-10-13 20:05:55,380 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:55,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1777138644, now seen corresponding path program 1 times [2019-10-13 20:05:55,380 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:55,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756869103] [2019-10-13 20:05:55,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:55,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:55,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:55,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756869103] [2019-10-13 20:05:55,590 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:55,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:55,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747924885] [2019-10-13 20:05:55,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:55,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:55,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:55,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:55,592 INFO L87 Difference]: Start difference. First operand 6333 states and 10771 transitions. Second operand 6 states. [2019-10-13 20:06:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:01,773 INFO L93 Difference]: Finished difference Result 15980 states and 27530 transitions. [2019-10-13 20:06:01,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:01,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-13 20:06:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:01,822 INFO L225 Difference]: With dead ends: 15980 [2019-10-13 20:06:01,822 INFO L226 Difference]: Without dead ends: 9653 [2019-10-13 20:06:01,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:06:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9653 states. [2019-10-13 20:06:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9653 to 9576. [2019-10-13 20:06:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9576 states. [2019-10-13 20:06:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 15604 transitions. [2019-10-13 20:06:02,067 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 15604 transitions. Word has length 150 [2019-10-13 20:06:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:02,068 INFO L462 AbstractCegarLoop]: Abstraction has 9576 states and 15604 transitions. [2019-10-13 20:06:02,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:06:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 15604 transitions. [2019-10-13 20:06:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-13 20:06:02,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:02,073 INFO L380 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, 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] [2019-10-13 20:06:02,073 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:02,073 INFO L82 PathProgramCache]: Analyzing trace with hash -124269619, now seen corresponding path program 1 times [2019-10-13 20:06:02,074 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:02,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214348527] [2019-10-13 20:06:02,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:02,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:02,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:02,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214348527] [2019-10-13 20:06:02,244 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:02,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:02,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983469387] [2019-10-13 20:06:02,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:02,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:02,246 INFO L87 Difference]: Start difference. First operand 9576 states and 15604 transitions. Second operand 6 states.