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_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:11:40,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:40,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:40,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:40,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:40,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:40,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:40,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:40,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:40,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:40,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:40,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:40,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:40,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:40,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:40,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:40,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:40,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:40,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:40,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:40,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:40,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:40,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:40,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:40,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:11:40,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:11:40,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:11:40,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:11:40,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:11:40,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:11:40,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:40,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:40,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:40,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:40,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:40,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:40,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:40,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:40,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:40,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:40,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:40,891 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 20:11:40,904 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:40,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:40,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:40,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:40,906 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:40,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:40,907 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:40,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:40,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:40,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:40,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:40,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:40,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:40,908 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:40,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:40,908 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:40,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:40,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:40,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:40,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:40,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:40,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:40,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:40,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:40,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:40,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:40,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:40,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:40,911 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 20:11:41,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:41,172 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:41,175 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:41,177 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:41,177 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:41,178 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label51.c [2019-10-13 20:11:41,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c897d018/85bb290b301e4806b61c74afb84dc6e6/FLAG7c33fb76d [2019-10-13 20:11:41,978 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:41,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label51.c [2019-10-13 20:11:42,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c897d018/85bb290b301e4806b61c74afb84dc6e6/FLAG7c33fb76d [2019-10-13 20:11:42,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c897d018/85bb290b301e4806b61c74afb84dc6e6 [2019-10-13 20:11:42,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:42,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:42,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:42,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:42,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:42,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:42" (1/1) ... [2019-10-13 20:11:42,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65982a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:42, skipping insertion in model container [2019-10-13 20:11:42,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:42" (1/1) ... [2019-10-13 20:11:42,118 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:42,240 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:43,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:43,407 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:43,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:43,877 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:43,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43 WrapperNode [2019-10-13 20:11:43,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:43,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:43,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:43,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:43,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43" (1/1) ... [2019-10-13 20:11:43,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43" (1/1) ... [2019-10-13 20:11:43,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43" (1/1) ... [2019-10-13 20:11:43,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43" (1/1) ... [2019-10-13 20:11:44,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43" (1/1) ... [2019-10-13 20:11:44,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43" (1/1) ... [2019-10-13 20:11:44,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43" (1/1) ... [2019-10-13 20:11:44,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:44,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:44,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:44,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:44,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43" (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 20:11:44,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:44,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:47,827 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:47,827 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:47,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:47 BoogieIcfgContainer [2019-10-13 20:11:47,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:47,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:47,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:47,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:47,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:42" (1/3) ... [2019-10-13 20:11:47,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e80aa66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:47, skipping insertion in model container [2019-10-13 20:11:47,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:43" (2/3) ... [2019-10-13 20:11:47,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e80aa66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:47, skipping insertion in model container [2019-10-13 20:11:47,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:47" (3/3) ... [2019-10-13 20:11:47,847 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label51.c [2019-10-13 20:11:47,857 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:47,866 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:47,877 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:47,908 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:47,909 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:47,909 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:47,909 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:47,909 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:47,909 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:47,909 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:47,909 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 20:11:47,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:47,950 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] [2019-10-13 20:11:47,952 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1085163511, now seen corresponding path program 1 times [2019-10-13 20:11:47,967 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:47,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671034997] [2019-10-13 20:11:47,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:47,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:47,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:48,300 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 20:11:48,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671034997] [2019-10-13 20:11:48,302 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:48,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:11:48,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140400411] [2019-10-13 20:11:48,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:48,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:48,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:48,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:48,325 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-10-13 20:11:55,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:55,126 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-10-13 20:11:55,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:55,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-13 20:11:55,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:55,170 INFO L225 Difference]: With dead ends: 2970 [2019-10-13 20:11:55,170 INFO L226 Difference]: Without dead ends: 2114 [2019-10-13 20:11:55,182 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 [2019-10-13 20:11:55,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-10-13 20:11:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2019-10-13 20:11:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2019-10-13 20:11:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3320 transitions. [2019-10-13 20:11:55,349 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3320 transitions. Word has length 66 [2019-10-13 20:11:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:55,349 INFO L462 AbstractCegarLoop]: Abstraction has 2114 states and 3320 transitions. [2019-10-13 20:11:55,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3320 transitions. [2019-10-13 20:11:55,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 20:11:55,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:55,357 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:55,357 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:55,358 INFO L82 PathProgramCache]: Analyzing trace with hash 340179813, now seen corresponding path program 1 times [2019-10-13 20:11:55,358 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:55,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693777840] [2019-10-13 20:11:55,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:55,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:55,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:55,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693777840] [2019-10-13 20:11:55,535 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:55,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:11:55,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141289004] [2019-10-13 20:11:55,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:55,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:55,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:55,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:11:55,545 INFO L87 Difference]: Start difference. First operand 2114 states and 3320 transitions. Second operand 5 states. [2019-10-13 20:12:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:00,729 INFO L93 Difference]: Finished difference Result 6436 states and 10244 transitions. [2019-10-13 20:12:00,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:12:00,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2019-10-13 20:12:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:00,764 INFO L225 Difference]: With dead ends: 6436 [2019-10-13 20:12:00,765 INFO L226 Difference]: Without dead ends: 4328 [2019-10-13 20:12:00,771 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 20:12:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2019-10-13 20:12:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4296. [2019-10-13 20:12:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-10-13 20:12:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6416 transitions. [2019-10-13 20:12:00,887 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6416 transitions. Word has length 135 [2019-10-13 20:12:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:00,887 INFO L462 AbstractCegarLoop]: Abstraction has 4296 states and 6416 transitions. [2019-10-13 20:12:00,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:12:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6416 transitions. [2019-10-13 20:12:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 20:12:00,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:00,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:00,892 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1733405200, now seen corresponding path program 1 times [2019-10-13 20:12:00,893 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:00,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841159034] [2019-10-13 20:12:00,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:00,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:00,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:01,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841159034] [2019-10-13 20:12:01,089 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:01,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:12:01,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025810869] [2019-10-13 20:12:01,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:12:01,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:01,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:12:01,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:12:01,091 INFO L87 Difference]: Start difference. First operand 4296 states and 6416 transitions. Second operand 6 states. [2019-10-13 20:12:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:06,697 INFO L93 Difference]: Finished difference Result 13101 states and 20256 transitions. [2019-10-13 20:12:06,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:12:06,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-10-13 20:12:06,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:06,751 INFO L225 Difference]: With dead ends: 13101 [2019-10-13 20:12:06,751 INFO L226 Difference]: Without dead ends: 8811 [2019-10-13 20:12:06,764 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 20:12:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8811 states. [2019-10-13 20:12:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8811 to 8751. [2019-10-13 20:12:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8751 states. [2019-10-13 20:12:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 13061 transitions. [2019-10-13 20:12:06,983 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 13061 transitions. Word has length 162 [2019-10-13 20:12:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:06,985 INFO L462 AbstractCegarLoop]: Abstraction has 8751 states and 13061 transitions. [2019-10-13 20:12:06,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:12:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 13061 transitions. [2019-10-13 20:12:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 20:12:06,990 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:06,990 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:06,990 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:06,991 INFO L82 PathProgramCache]: Analyzing trace with hash -762986116, now seen corresponding path program 1 times [2019-10-13 20:12:06,991 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:06,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316250021] [2019-10-13 20:12:06,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:06,992 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:06,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:07,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316250021] [2019-10-13 20:12:07,184 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:07,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:12:07,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376155576] [2019-10-13 20:12:07,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:12:07,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:07,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:12:07,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:12:07,186 INFO L87 Difference]: Start difference. First operand 8751 states and 13061 transitions. Second operand 4 states. [2019-10-13 20:12:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:13,103 INFO L93 Difference]: Finished difference Result 21753 states and 32327 transitions. [2019-10-13 20:12:13,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:12:13,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-13 20:12:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:13,177 INFO L225 Difference]: With dead ends: 21753 [2019-10-13 20:12:13,178 INFO L226 Difference]: Without dead ends: 13008 [2019-10-13 20:12:13,200 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 20:12:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13008 states. [2019-10-13 20:12:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13008 to 13008. [2019-10-13 20:12:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13008 states. [2019-10-13 20:12:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13008 states to 13008 states and 17080 transitions. [2019-10-13 20:12:13,464 INFO L78 Accepts]: Start accepts. Automaton has 13008 states and 17080 transitions. Word has length 172 [2019-10-13 20:12:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:13,465 INFO L462 AbstractCegarLoop]: Abstraction has 13008 states and 17080 transitions. [2019-10-13 20:12:13,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:12:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 13008 states and 17080 transitions. [2019-10-13 20:12:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-10-13 20:12:13,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:13,471 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:12:13,471 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:13,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:13,471 INFO L82 PathProgramCache]: Analyzing trace with hash -929813213, now seen corresponding path program 1 times [2019-10-13 20:12:13,472 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:13,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908323813] [2019-10-13 20:12:13,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:13,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:13,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 118 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:12:13,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908323813] [2019-10-13 20:12:13,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730562427] [2019-10-13 20:12:13,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:12:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:13,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:12:13,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:12:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 20:12:14,046 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:12:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 118 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:12:14,190 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:12:14,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:12:14,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096473038] [2019-10-13 20:12:14,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:12:14,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:14,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:12:14,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:12:14,192 INFO L87 Difference]: Start difference. First operand 13008 states and 17080 transitions. Second operand 5 states.