java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:31,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:31,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:31,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:31,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:31,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:31,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:31,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:31,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:31,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:31,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:31,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:31,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:31,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:31,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:31,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:31,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:31,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:31,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:31,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:31,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:31,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:31,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:31,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:31,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:05:31,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:31,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:31,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:31,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:31,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:31,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:31,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:31,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:31,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:31,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:31,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:31,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:05:31,889 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:31,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:31,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:31,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:31,890 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:31,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:31,891 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:31,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:31,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:31,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:31,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:31,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:31,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:31,897 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:31,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:31,897 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:31,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:31,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:31,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:31,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:31,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:31,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:31,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:31,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:31,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:31,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:31,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:31,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:31,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:05:32,191 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:32,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:32,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:32,218 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:32,219 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:32,219 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label16.c [2019-10-13 20:05:32,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d007dc4c3/ac25f8bd6f51481b98c43c3d43e9bb78/FLAG5110d0872 [2019-10-13 20:05:33,008 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:33,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label16.c [2019-10-13 20:05:33,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d007dc4c3/ac25f8bd6f51481b98c43c3d43e9bb78/FLAG5110d0872 [2019-10-13 20:05:33,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d007dc4c3/ac25f8bd6f51481b98c43c3d43e9bb78 [2019-10-13 20:05:33,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:33,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:33,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:33,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:33,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:33,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:33" (1/1) ... [2019-10-13 20:05:33,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bc3439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:33, skipping insertion in model container [2019-10-13 20:05:33,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:33" (1/1) ... [2019-10-13 20:05:33,147 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:33,288 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:34,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:34,785 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:35,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:35,578 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:35,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35 WrapperNode [2019-10-13 20:05:35,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:35,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:35,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:35,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:35,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35" (1/1) ... [2019-10-13 20:05:35,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35" (1/1) ... [2019-10-13 20:05:35,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35" (1/1) ... [2019-10-13 20:05:35,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35" (1/1) ... [2019-10-13 20:05:35,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35" (1/1) ... [2019-10-13 20:05:35,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35" (1/1) ... [2019-10-13 20:05:35,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35" (1/1) ... [2019-10-13 20:05:35,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:35,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:35,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:35,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:35,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:36,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:36,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:36,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:36,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:05:36,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:05:36,052 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 20:05:36,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:05:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:05:36,055 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 20:05:36,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:36,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:36,057 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:36,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:36,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:41,415 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:41,419 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:41,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:41 BoogieIcfgContainer [2019-10-13 20:05:41,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:41,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:41,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:41,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:41,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:33" (1/3) ... [2019-10-13 20:05:41,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730ccb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:41, skipping insertion in model container [2019-10-13 20:05:41,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:35" (2/3) ... [2019-10-13 20:05:41,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730ccb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:41, skipping insertion in model container [2019-10-13 20:05:41,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:41" (3/3) ... [2019-10-13 20:05:41,436 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label16.c [2019-10-13 20:05:41,451 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:41,461 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:41,472 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:41,515 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:41,516 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:41,516 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:41,516 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:41,516 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:41,516 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:41,516 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:41,516 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 20:05:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 20:05:41,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:41,571 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:41,573 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:41,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1315979506, now seen corresponding path program 1 times [2019-10-13 20:05:41,588 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:41,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068170591] [2019-10-13 20:05:41,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:41,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:41,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:41,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068170591] [2019-10-13 20:05:41,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:41,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:05:41,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070667595] [2019-10-13 20:05:41,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:41,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:41,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:41,969 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-13 20:05:46,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:46,915 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-10-13 20:05:46,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:46,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-10-13 20:05:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:46,960 INFO L225 Difference]: With dead ends: 2443 [2019-10-13 20:05:46,961 INFO L226 Difference]: Without dead ends: 1542 [2019-10-13 20:05:46,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-13 20:05:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-13 20:05:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-13 20:05:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2822 transitions. [2019-10-13 20:05:47,142 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2822 transitions. Word has length 71 [2019-10-13 20:05:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:47,144 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2822 transitions. [2019-10-13 20:05:47,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2822 transitions. [2019-10-13 20:05:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 20:05:47,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:47,157 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:05:47,158 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:47,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1550888775, now seen corresponding path program 1 times [2019-10-13 20:05:47,159 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:47,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237156521] [2019-10-13 20:05:47,159 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:47,160 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:47,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:47,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237156521] [2019-10-13 20:05:47,421 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:47,421 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:05:47,421 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784122741] [2019-10-13 20:05:47,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:05:47,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:47,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:05:47,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:05:47,425 INFO L87 Difference]: Start difference. First operand 1542 states and 2822 transitions. Second operand 5 states. [2019-10-13 20:05:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:53,818 INFO L93 Difference]: Finished difference Result 3912 states and 7104 transitions. [2019-10-13 20:05:53,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:53,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2019-10-13 20:05:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:53,834 INFO L225 Difference]: With dead ends: 3912 [2019-10-13 20:05:53,834 INFO L226 Difference]: Without dead ends: 2376 [2019-10-13 20:05:53,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:05:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2019-10-13 20:05:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2350. [2019-10-13 20:05:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2350 states. [2019-10-13 20:05:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3968 transitions. [2019-10-13 20:05:53,900 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3968 transitions. Word has length 144 [2019-10-13 20:05:53,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:53,900 INFO L462 AbstractCegarLoop]: Abstraction has 2350 states and 3968 transitions. [2019-10-13 20:05:53,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:05:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3968 transitions. [2019-10-13 20:05:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 20:05:53,903 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:53,904 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:05:53,904 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash 318484651, now seen corresponding path program 1 times [2019-10-13 20:05:53,905 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:53,905 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503519119] [2019-10-13 20:05:53,905 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:53,905 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:53,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:54,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503519119] [2019-10-13 20:05:54,058 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:54,058 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:54,058 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702291978] [2019-10-13 20:05:54,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:54,059 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:54,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:54,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:54,060 INFO L87 Difference]: Start difference. First operand 2350 states and 3968 transitions. Second operand 4 states. [2019-10-13 20:06:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:01,385 INFO L93 Difference]: Finished difference Result 9360 states and 16172 transitions. [2019-10-13 20:06:01,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:01,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-13 20:06:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:01,428 INFO L225 Difference]: With dead ends: 9360 [2019-10-13 20:06:01,428 INFO L226 Difference]: Without dead ends: 7016 [2019-10-13 20:06:01,436 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 20:06:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7016 states. [2019-10-13 20:06:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7016 to 7016. [2019-10-13 20:06:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7016 states. [2019-10-13 20:06:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 11456 transitions. [2019-10-13 20:06:01,611 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 11456 transitions. Word has length 146 [2019-10-13 20:06:01,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:01,612 INFO L462 AbstractCegarLoop]: Abstraction has 7016 states and 11456 transitions. [2019-10-13 20:06:01,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 11456 transitions. [2019-10-13 20:06:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 20:06:01,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:01,619 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, 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] [2019-10-13 20:06:01,619 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:01,620 INFO L82 PathProgramCache]: Analyzing trace with hash 702612695, now seen corresponding path program 1 times [2019-10-13 20:06:01,620 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:01,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792056006] [2019-10-13 20:06:01,620 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:01,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:01,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:01,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792056006] [2019-10-13 20:06:01,820 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:01,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:01,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246560018] [2019-10-13 20:06:01,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:01,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:01,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:01,822 INFO L87 Difference]: Start difference. First operand 7016 states and 11456 transitions. Second operand 6 states. [2019-10-13 20:06:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:07,786 INFO L93 Difference]: Finished difference Result 14265 states and 23554 transitions. [2019-10-13 20:06:07,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:07,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-13 20:06:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:07,821 INFO L225 Difference]: With dead ends: 14265 [2019-10-13 20:06:07,821 INFO L226 Difference]: Without dead ends: 7255 [2019-10-13 20:06:07,836 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:06:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7255 states. [2019-10-13 20:06:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7255 to 7224. [2019-10-13 20:06:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7224 states. [2019-10-13 20:06:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7224 states to 7224 states and 11484 transitions. [2019-10-13 20:06:08,011 INFO L78 Accepts]: Start accepts. Automaton has 7224 states and 11484 transitions. Word has length 152 [2019-10-13 20:06:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:08,012 INFO L462 AbstractCegarLoop]: Abstraction has 7224 states and 11484 transitions. [2019-10-13 20:06:08,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:06:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 7224 states and 11484 transitions. [2019-10-13 20:06:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 20:06:08,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:08,015 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:08,015 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:08,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:08,016 INFO L82 PathProgramCache]: Analyzing trace with hash -460226657, now seen corresponding path program 1 times [2019-10-13 20:06:08,016 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:08,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593551116] [2019-10-13 20:06:08,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:08,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:08,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:08,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593551116] [2019-10-13 20:06:08,131 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:08,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:06:08,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946771653] [2019-10-13 20:06:08,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:08,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:08,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:08,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:06:08,134 INFO L87 Difference]: Start difference. First operand 7224 states and 11484 transitions. Second operand 5 states.