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_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:23,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:23,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:23,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:23,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:23,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:23,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:23,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:23,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:23,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:23,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:23,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:23,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:23,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:23,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:23,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:23,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:23,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:23,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:23,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:23,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:23,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:23,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:23,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:23,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 00:10:23,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 00:10:23,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 00:10:23,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 00:10:23,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 00:10:23,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 00:10:23,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:10:23,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:10:23,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:10:23,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:10:23,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:10:23,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:10:23,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:10:23,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:10:23,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:23,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:23,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:23,277 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 00:10:23,316 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:23,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:23,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:23,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:23,323 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:23,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:23,324 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:23,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:23,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:23,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:23,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:23,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:23,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:23,325 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:23,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:23,326 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:23,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:23,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:23,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:23,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:23,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:23,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:23,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:23,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:23,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:23,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:23,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:23,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:23,330 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 00:10:23,667 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:23,688 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:23,692 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:23,694 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:23,694 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:23,695 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label44.c [2019-10-15 00:10:23,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5400b2e2/608e3f9955424b6d8ad34cd4abdf60bb/FLAG4b58fba2f [2019-10-15 00:10:24,472 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:24,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label44.c [2019-10-15 00:10:24,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5400b2e2/608e3f9955424b6d8ad34cd4abdf60bb/FLAG4b58fba2f [2019-10-15 00:10:24,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5400b2e2/608e3f9955424b6d8ad34cd4abdf60bb [2019-10-15 00:10:24,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:24,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:24,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:24,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:24,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:24,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:24" (1/1) ... [2019-10-15 00:10:24,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5d6135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:24, skipping insertion in model container [2019-10-15 00:10:24,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:24" (1/1) ... [2019-10-15 00:10:24,674 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:24,796 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:26,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:26,077 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:26,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:26,649 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:26,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26 WrapperNode [2019-10-15 00:10:26,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:26,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:26,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:26,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:26,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26" (1/1) ... [2019-10-15 00:10:26,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26" (1/1) ... [2019-10-15 00:10:26,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26" (1/1) ... [2019-10-15 00:10:26,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26" (1/1) ... [2019-10-15 00:10:26,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26" (1/1) ... [2019-10-15 00:10:26,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26" (1/1) ... [2019-10-15 00:10:26,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26" (1/1) ... [2019-10-15 00:10:26,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:26,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:26,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:26,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:26,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26" (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 00:10:27,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:27,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:27,012 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:27,012 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:27,012 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:27,014 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:27,014 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:31,223 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:31,223 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:31,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:31 BoogieIcfgContainer [2019-10-15 00:10:31,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:31,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:31,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:31,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:31,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:24" (1/3) ... [2019-10-15 00:10:31,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692c85bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:31, skipping insertion in model container [2019-10-15 00:10:31,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:26" (2/3) ... [2019-10-15 00:10:31,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692c85bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:31, skipping insertion in model container [2019-10-15 00:10:31,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:31" (3/3) ... [2019-10-15 00:10:31,243 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label44.c [2019-10-15 00:10:31,257 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:31,267 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:31,279 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:31,321 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:31,322 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:31,322 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:31,322 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:31,322 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:31,322 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:31,322 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:31,323 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 00:10:31,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:31,376 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] [2019-10-15 00:10:31,378 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1139178023, now seen corresponding path program 1 times [2019-10-15 00:10:31,396 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:31,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068230975] [2019-10-15 00:10:31,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:31,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:31,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:31,760 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 00:10:31,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068230975] [2019-10-15 00:10:31,762 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:31,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:31,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149760952] [2019-10-15 00:10:31,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:31,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:31,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:31,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:31,788 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-10-15 00:10:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:39,096 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-10-15 00:10:39,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:39,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-10-15 00:10:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:39,149 INFO L225 Difference]: With dead ends: 2970 [2019-10-15 00:10:39,149 INFO L226 Difference]: Without dead ends: 2114 [2019-10-15 00:10:39,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 00:10:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-10-15 00:10:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1412. [2019-10-15 00:10:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2246 transitions. [2019-10-15 00:10:39,347 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2246 transitions. Word has length 38 [2019-10-15 00:10:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:39,347 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2246 transitions. [2019-10-15 00:10:39,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2246 transitions. [2019-10-15 00:10:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-15 00:10:39,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:39,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:39,357 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1991333515, now seen corresponding path program 1 times [2019-10-15 00:10:39,359 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:39,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681357466] [2019-10-15 00:10:39,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:39,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:39,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:39,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681357466] [2019-10-15 00:10:39,697 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:39,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:39,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784649445] [2019-10-15 00:10:39,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:39,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:39,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:39,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:39,706 INFO L87 Difference]: Start difference. First operand 1412 states and 2246 transitions. Second operand 5 states. [2019-10-15 00:10:45,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:45,714 INFO L93 Difference]: Finished difference Result 4294 states and 6875 transitions. [2019-10-15 00:10:45,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:45,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2019-10-15 00:10:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:45,733 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:10:45,733 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:10:45,737 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 [2019-10-15 00:10:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:10:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2866. [2019-10-15 00:10:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2866 states. [2019-10-15 00:10:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 4300 transitions. [2019-10-15 00:10:45,808 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 4300 transitions. Word has length 107 [2019-10-15 00:10:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:45,809 INFO L462 AbstractCegarLoop]: Abstraction has 2866 states and 4300 transitions. [2019-10-15 00:10:45,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 4300 transitions. [2019-10-15 00:10:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 00:10:45,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:45,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:45,812 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1573098451, now seen corresponding path program 1 times [2019-10-15 00:10:45,813 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:45,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219642080] [2019-10-15 00:10:45,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:45,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:45,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:45,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219642080] [2019-10-15 00:10:45,923 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:45,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:45,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729380698] [2019-10-15 00:10:45,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:45,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:45,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:45,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:45,925 INFO L87 Difference]: Start difference. First operand 2866 states and 4300 transitions. Second operand 6 states. [2019-10-15 00:10:51,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:51,659 INFO L93 Difference]: Finished difference Result 8752 states and 13417 transitions. [2019-10-15 00:10:51,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:51,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2019-10-15 00:10:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:51,702 INFO L225 Difference]: With dead ends: 8752 [2019-10-15 00:10:51,702 INFO L226 Difference]: Without dead ends: 5892 [2019-10-15 00:10:51,710 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 00:10:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2019-10-15 00:10:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5837. [2019-10-15 00:10:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5837 states. [2019-10-15 00:10:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5837 states to 5837 states and 8644 transitions. [2019-10-15 00:10:51,941 INFO L78 Accepts]: Start accepts. Automaton has 5837 states and 8644 transitions. Word has length 111 [2019-10-15 00:10:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:51,942 INFO L462 AbstractCegarLoop]: Abstraction has 5837 states and 8644 transitions. [2019-10-15 00:10:51,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 5837 states and 8644 transitions. [2019-10-15 00:10:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:10:51,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:51,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:51,945 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:51,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1086561052, now seen corresponding path program 1 times [2019-10-15 00:10:51,946 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:51,946 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824670037] [2019-10-15 00:10:51,946 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:51,946 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:51,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:52,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824670037] [2019-10-15 00:10:52,114 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:52,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:52,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586861005] [2019-10-15 00:10:52,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:52,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:52,117 INFO L87 Difference]: Start difference. First operand 5837 states and 8644 transitions. Second operand 6 states. [2019-10-15 00:10:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:57,260 INFO L93 Difference]: Finished difference Result 14683 states and 22171 transitions. [2019-10-15 00:10:57,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:57,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2019-10-15 00:10:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:57,308 INFO L225 Difference]: With dead ends: 14683 [2019-10-15 00:10:57,309 INFO L226 Difference]: Without dead ends: 8852 [2019-10-15 00:10:57,327 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 00:10:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2019-10-15 00:10:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 8798. [2019-10-15 00:10:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8798 states. [2019-10-15 00:10:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8798 states to 8798 states and 12610 transitions. [2019-10-15 00:10:57,660 INFO L78 Accepts]: Start accepts. Automaton has 8798 states and 12610 transitions. Word has length 132 [2019-10-15 00:10:57,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:57,661 INFO L462 AbstractCegarLoop]: Abstraction has 8798 states and 12610 transitions. [2019-10-15 00:10:57,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:57,661 INFO L276 IsEmpty]: Start isEmpty. Operand 8798 states and 12610 transitions. [2019-10-15 00:10:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 00:10:57,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:57,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:57,665 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565869, now seen corresponding path program 1 times [2019-10-15 00:10:57,665 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:57,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659311215] [2019-10-15 00:10:57,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:57,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:57,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:57,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659311215] [2019-10-15 00:10:57,943 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:57,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:57,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418746893] [2019-10-15 00:10:57,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:57,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:57,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:57,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:57,945 INFO L87 Difference]: Start difference. First operand 8798 states and 12610 transitions. Second operand 6 states.