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 0.1.24-13a467a-m [2019-10-15 00:09:43,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:43,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:43,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:43,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:43,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:43,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:43,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:43,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:43,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:43,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:43,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:43,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:43,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:43,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:43,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:43,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:43,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:43,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:43,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:43,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:43,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:43,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:43,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:43,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:43,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:09:43,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:09:43,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:09:43,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:09:43,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:09:43,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:09:43,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:09:43,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:09:43,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:43,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:43,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:43,255 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 [2019-10-15 00:09:43,277 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:43,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:43,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:43,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:43,279 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:43,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:43,280 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:43,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:43,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:43,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:43,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:43,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:43,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:43,283 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:43,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:43,283 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:43,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:43,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:43,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:43,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:43,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:43,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:43,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:43,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:43,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:43,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:43,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:43,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:43,286 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 [2019-10-15 00:09:43,584 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:43,597 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:43,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:43,603 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:43,603 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:43,604 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label16.c [2019-10-15 00:09:43,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17d86028e/6f53b0a20e224c7d9d9c784f67b86ca6/FLAG81f143de4 [2019-10-15 00:09:44,483 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:44,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label16.c [2019-10-15 00:09:44,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17d86028e/6f53b0a20e224c7d9d9c784f67b86ca6/FLAG81f143de4 [2019-10-15 00:09:44,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17d86028e/6f53b0a20e224c7d9d9c784f67b86ca6 [2019-10-15 00:09:44,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:44,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:44,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:44,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:44,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:44,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:44" (1/1) ... [2019-10-15 00:09:44,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211aa4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:44, skipping insertion in model container [2019-10-15 00:09:44,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:44" (1/1) ... [2019-10-15 00:09:44,575 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:44,717 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:46,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:46,157 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:46,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:46,721 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:46,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46 WrapperNode [2019-10-15 00:09:46,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:46,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:46,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:46,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:46,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46" (1/1) ... [2019-10-15 00:09:46,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46" (1/1) ... [2019-10-15 00:09:46,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46" (1/1) ... [2019-10-15 00:09:46,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46" (1/1) ... [2019-10-15 00:09:46,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46" (1/1) ... [2019-10-15 00:09:46,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46" (1/1) ... [2019-10-15 00:09:46,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46" (1/1) ... [2019-10-15 00:09:46,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:46,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:46,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:46,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:46,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46" (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 [2019-10-15 00:09:47,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:47,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:47,069 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:47,070 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:47,070 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:09:47,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:47,071 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:09:47,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:47,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:47,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:51,306 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:51,307 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:51,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:51 BoogieIcfgContainer [2019-10-15 00:09:51,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:51,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:51,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:51,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:51,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:44" (1/3) ... [2019-10-15 00:09:51,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41557ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:51, skipping insertion in model container [2019-10-15 00:09:51,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:46" (2/3) ... [2019-10-15 00:09:51,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41557ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:51, skipping insertion in model container [2019-10-15 00:09:51,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:51" (3/3) ... [2019-10-15 00:09:51,318 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label16.c [2019-10-15 00:09:51,328 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:51,338 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:51,349 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:51,383 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:51,383 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:51,383 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:51,383 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:51,384 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:51,384 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:51,384 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:51,384 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:51,418 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:09:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-15 00:09:51,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:51,428 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] [2019-10-15 00:09:51,430 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1134727921, now seen corresponding path program 1 times [2019-10-15 00:09:51,446 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:51,446 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550442483] [2019-10-15 00:09:51,446 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:51,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:51,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:51,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550442483] [2019-10-15 00:09:51,780 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:51,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:51,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151529499] [2019-10-15 00:09:51,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:51,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:51,807 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:09:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:56,299 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:09:56,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:56,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-10-15 00:09:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:56,340 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:09:56,341 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:09:56,356 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 [2019-10-15 00:09:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:09:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:09:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:09:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-15 00:09:56,546 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 52 [2019-10-15 00:09:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:56,548 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-15 00:09:56,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-15 00:09:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 00:09:56,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:56,564 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] [2019-10-15 00:09:56,565 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:56,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1821965093, now seen corresponding path program 1 times [2019-10-15 00:09:56,566 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:56,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981400697] [2019-10-15 00:09:56,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:56,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:56,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:56,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981400697] [2019-10-15 00:09:56,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:56,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:56,847 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027786383] [2019-10-15 00:09:56,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:56,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:56,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:56,850 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-15 00:10:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:02,313 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-15 00:10:02,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:02,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-15 00:10:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:02,332 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:10:02,333 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:10:02,337 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 [2019-10-15 00:10:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:10:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-15 00:10:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-15 00:10:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 5127 transitions. [2019-10-15 00:10:02,440 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 5127 transitions. Word has length 125 [2019-10-15 00:10:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:02,441 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 5127 transitions. [2019-10-15 00:10:02,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 5127 transitions. [2019-10-15 00:10:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-15 00:10:02,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:02,444 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] [2019-10-15 00:10:02,444 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1074622240, now seen corresponding path program 1 times [2019-10-15 00:10:02,445 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:02,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760183213] [2019-10-15 00:10:02,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:02,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:02,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:02,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760183213] [2019-10-15 00:10:02,536 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:02,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:02,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173041300] [2019-10-15 00:10:02,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:02,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:02,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:02,538 INFO L87 Difference]: Start difference. First operand 2864 states and 5127 transitions. Second operand 5 states. [2019-10-15 00:10:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:08,272 INFO L93 Difference]: Finished difference Result 8048 states and 14478 transitions. [2019-10-15 00:10:08,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:10:08,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2019-10-15 00:10:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:08,306 INFO L225 Difference]: With dead ends: 8048 [2019-10-15 00:10:08,306 INFO L226 Difference]: Without dead ends: 5190 [2019-10-15 00:10:08,313 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 [2019-10-15 00:10:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2019-10-15 00:10:08,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 5092. [2019-10-15 00:10:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5092 states. [2019-10-15 00:10:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 8027 transitions. [2019-10-15 00:10:08,480 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 8027 transitions. Word has length 128 [2019-10-15 00:10:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:08,482 INFO L462 AbstractCegarLoop]: Abstraction has 5092 states and 8027 transitions. [2019-10-15 00:10:08,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 8027 transitions. [2019-10-15 00:10:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 00:10:08,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:08,486 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] [2019-10-15 00:10:08,487 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:08,487 INFO L82 PathProgramCache]: Analyzing trace with hash -454172028, now seen corresponding path program 1 times [2019-10-15 00:10:08,488 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:08,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89312432] [2019-10-15 00:10:08,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:08,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:08,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:08,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89312432] [2019-10-15 00:10:08,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:08,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:08,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106876516] [2019-10-15 00:10:08,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:08,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:08,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:08,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:08,697 INFO L87 Difference]: Start difference. First operand 5092 states and 8027 transitions. Second operand 4 states. [2019-10-15 00:10:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:14,583 INFO L93 Difference]: Finished difference Result 15874 states and 25164 transitions. [2019-10-15 00:10:14,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:14,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-10-15 00:10:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:14,635 INFO L225 Difference]: With dead ends: 15874 [2019-10-15 00:10:14,635 INFO L226 Difference]: Without dead ends: 10788 [2019-10-15 00:10:14,649 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 [2019-10-15 00:10:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2019-10-15 00:10:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 10788. [2019-10-15 00:10:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10788 states. [2019-10-15 00:10:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10788 states to 10788 states and 15447 transitions. [2019-10-15 00:10:14,948 INFO L78 Accepts]: Start accepts. Automaton has 10788 states and 15447 transitions. Word has length 158 [2019-10-15 00:10:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:14,950 INFO L462 AbstractCegarLoop]: Abstraction has 10788 states and 15447 transitions. [2019-10-15 00:10:14,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 10788 states and 15447 transitions. [2019-10-15 00:10:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-15 00:10:14,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:14,959 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] [2019-10-15 00:10:14,959 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:14,960 INFO L82 PathProgramCache]: Analyzing trace with hash 628188816, now seen corresponding path program 1 times [2019-10-15 00:10:14,961 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:14,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503397857] [2019-10-15 00:10:14,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:14,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:14,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:15,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503397857] [2019-10-15 00:10:15,258 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:15,258 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:15,258 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846133767] [2019-10-15 00:10:15,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:15,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:15,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:15,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:15,260 INFO L87 Difference]: Start difference. First operand 10788 states and 15447 transitions. Second operand 6 states.