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/Problem18_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:10:50,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:10:50,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:10:50,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:10:50,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:10:50,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:10:50,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:10:50,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:10:50,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:10:50,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:10:50,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:10:50,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:10:50,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:10:50,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:10:50,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:10:50,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:10:50,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:10:50,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:10:50,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:10:50,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:10:50,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:10:50,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:10:50,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:10:50,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:10:50,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:10:50,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:10:50,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:10:50,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:10:50,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:10:50,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:10:50,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:10:50,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:10:50,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:10:50,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:10:50,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:10:50,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:10:50,311 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 20:10:50,332 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:10:50,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:10:50,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:10:50,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:10:50,335 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:10:50,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:10:50,335 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:10:50,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:10:50,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:10:50,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:10:50,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:10:50,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:10:50,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:10:50,338 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:10:50,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:10:50,338 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:10:50,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:10:50,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:10:50,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:10:50,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:10:50,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:10:50,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:50,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:10:50,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:10:50,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:10:50,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:10:50,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:10:50,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:10:50,341 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 20:10:50,625 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:10:50,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:10:50,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:10:50,648 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:10:50,648 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:10:50,649 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label16.c [2019-10-13 20:10:50,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f864ef2/10170199939f408292924648c3b94c71/FLAG74d2d1e55 [2019-10-13 20:10:51,509 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:10:51,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label16.c [2019-10-13 20:10:51,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f864ef2/10170199939f408292924648c3b94c71/FLAG74d2d1e55 [2019-10-13 20:10:51,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f864ef2/10170199939f408292924648c3b94c71 [2019-10-13 20:10:51,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:10:51,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:10:51,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:51,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:10:51,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:10:51,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:51" (1/1) ... [2019-10-13 20:10:51,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d868ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:51, skipping insertion in model container [2019-10-13 20:10:51,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:51" (1/1) ... [2019-10-13 20:10:51,675 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:10:51,796 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:10:52,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:52,926 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:10:53,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:53,507 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:10:53,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53 WrapperNode [2019-10-13 20:10:53,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:53,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:10:53,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:10:53,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:10:53,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53" (1/1) ... [2019-10-13 20:10:53,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53" (1/1) ... [2019-10-13 20:10:53,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53" (1/1) ... [2019-10-13 20:10:53,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53" (1/1) ... [2019-10-13 20:10:53,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53" (1/1) ... [2019-10-13 20:10:53,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53" (1/1) ... [2019-10-13 20:10:53,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53" (1/1) ... [2019-10-13 20:10:53,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:10:53,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:10:53,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:10:53,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:10:53,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53" (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 20:10:53,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:10:53,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:10:53,860 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:10:53,860 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:10:53,860 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:10:53,860 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:10:53,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:10:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:10:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:10:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:10:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:10:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:10:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:10:53,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:10:53,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:10:57,946 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:10:57,946 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:10:57,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:57 BoogieIcfgContainer [2019-10-13 20:10:57,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:10:57,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:10:57,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:10:57,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:10:57,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:51" (1/3) ... [2019-10-13 20:10:57,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7455b995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:57, skipping insertion in model container [2019-10-13 20:10:57,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:53" (2/3) ... [2019-10-13 20:10:57,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7455b995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:57, skipping insertion in model container [2019-10-13 20:10:57,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:57" (3/3) ... [2019-10-13 20:10:57,957 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label16.c [2019-10-13 20:10:57,967 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:10:57,978 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:10:57,990 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:10:58,034 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:10:58,035 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:10:58,035 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:10:58,035 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:10:58,035 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:10:58,035 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:10:58,036 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:10:58,036 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:10:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:10:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 20:10:58,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:58,095 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] [2019-10-13 20:10:58,097 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:58,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1134727921, now seen corresponding path program 1 times [2019-10-13 20:10:58,116 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:58,116 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511448873] [2019-10-13 20:10:58,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:58,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:58,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:58,565 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 20:10:58,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511448873] [2019-10-13 20:10:58,567 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:58,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:10:58,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173482996] [2019-10-13 20:10:58,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:10:58,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:10:58,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:10:58,594 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:03,400 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:03,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:03,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-10-13 20:11:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:03,438 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:03,439 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:03,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 20:11:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-13 20:11:03,611 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 52 [2019-10-13 20:11:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:03,612 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-13 20:11:03,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-13 20:11:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 20:11:03,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:03,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:03,619 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:03,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:03,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1821965093, now seen corresponding path program 1 times [2019-10-13 20:11:03,620 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:03,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808247698] [2019-10-13 20:11:03,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:03,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:03,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:03,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808247698] [2019-10-13 20:11:03,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:03,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:03,849 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450571844] [2019-10-13 20:11:03,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:03,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:03,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:03,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:03,852 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-13 20:11:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:09,566 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-13 20:11:09,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:09,567 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-13 20:11:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:09,591 INFO L225 Difference]: With dead ends: 4294 [2019-10-13 20:11:09,591 INFO L226 Difference]: Without dead ends: 2888 [2019-10-13 20:11:09,596 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 20:11:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-13 20:11:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-13 20:11:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-13 20:11:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 5127 transitions. [2019-10-13 20:11:09,731 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 5127 transitions. Word has length 125 [2019-10-13 20:11:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:09,734 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 5127 transitions. [2019-10-13 20:11:09,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 5127 transitions. [2019-10-13 20:11:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 20:11:09,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:09,745 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:09,746 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:09,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:09,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1074622240, now seen corresponding path program 1 times [2019-10-13 20:11:09,747 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:09,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670476373] [2019-10-13 20:11:09,747 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:09,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:09,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:09,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670476373] [2019-10-13 20:11:09,920 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:09,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:11:09,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607789080] [2019-10-13 20:11:09,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:09,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:11:09,928 INFO L87 Difference]: Start difference. First operand 2864 states and 5127 transitions. Second operand 5 states. [2019-10-13 20:11:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:15,950 INFO L93 Difference]: Finished difference Result 8048 states and 14478 transitions. [2019-10-13 20:11:15,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:11:15,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2019-10-13 20:11:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:15,986 INFO L225 Difference]: With dead ends: 8048 [2019-10-13 20:11:15,986 INFO L226 Difference]: Without dead ends: 5190 [2019-10-13 20:11:15,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 20:11:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2019-10-13 20:11:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 5092. [2019-10-13 20:11:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5092 states. [2019-10-13 20:11:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 8027 transitions. [2019-10-13 20:11:16,171 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 8027 transitions. Word has length 128 [2019-10-13 20:11:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:16,174 INFO L462 AbstractCegarLoop]: Abstraction has 5092 states and 8027 transitions. [2019-10-13 20:11:16,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:11:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 8027 transitions. [2019-10-13 20:11:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 20:11:16,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:16,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:16,177 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash -454172028, now seen corresponding path program 1 times [2019-10-13 20:11:16,178 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:16,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008216043] [2019-10-13 20:11:16,179 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:16,179 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:16,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:16,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008216043] [2019-10-13 20:11:16,410 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:16,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:11:16,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364945471] [2019-10-13 20:11:16,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:16,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:16,413 INFO L87 Difference]: Start difference. First operand 5092 states and 8027 transitions. Second operand 4 states. [2019-10-13 20:11:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:22,446 INFO L93 Difference]: Finished difference Result 15874 states and 25164 transitions. [2019-10-13 20:11:22,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:22,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-10-13 20:11:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:22,499 INFO L225 Difference]: With dead ends: 15874 [2019-10-13 20:11:22,500 INFO L226 Difference]: Without dead ends: 10788 [2019-10-13 20:11:22,514 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:22,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2019-10-13 20:11:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 10788. [2019-10-13 20:11:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10788 states. [2019-10-13 20:11:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10788 states to 10788 states and 15447 transitions. [2019-10-13 20:11:22,879 INFO L78 Accepts]: Start accepts. Automaton has 10788 states and 15447 transitions. Word has length 158 [2019-10-13 20:11:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:22,881 INFO L462 AbstractCegarLoop]: Abstraction has 10788 states and 15447 transitions. [2019-10-13 20:11:22,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 10788 states and 15447 transitions. [2019-10-13 20:11:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-13 20:11:22,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:22,887 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:22,887 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:22,888 INFO L82 PathProgramCache]: Analyzing trace with hash 628188816, now seen corresponding path program 1 times [2019-10-13 20:11:22,888 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:22,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832761848] [2019-10-13 20:11:22,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:22,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:22,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:23,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832761848] [2019-10-13 20:11:23,200 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:23,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:23,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540609764] [2019-10-13 20:11:23,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:23,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:23,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:23,202 INFO L87 Difference]: Start difference. First operand 10788 states and 15447 transitions. Second operand 6 states.