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_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:13,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:13,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:13,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:13,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:13,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:13,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:13,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:13,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:13,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:13,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:13,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:13,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:13,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:13,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:13,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:13,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:13,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:13,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:13,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:13,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:13,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:13,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:13,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:13,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:10:13,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:13,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:13,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:13,952 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 00:10:13,986 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:13,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:13,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:13,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:13,990 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:13,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:13,990 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:13,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:13,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:13,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:13,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:13,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:13,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:13,994 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:13,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:13,994 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:13,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:13,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:13,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:13,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:13,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:13,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:13,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:13,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:13,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:13,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:13,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:13,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:13,997 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 00:10:14,280 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:14,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:14,297 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:14,298 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:14,299 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:14,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30.c [2019-10-15 00:10:14,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f0704718/ee3594c4e6794a6fadd598d3fa2f5032/FLAGb01b52c9e [2019-10-15 00:10:15,134 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:15,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label30.c [2019-10-15 00:10:15,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f0704718/ee3594c4e6794a6fadd598d3fa2f5032/FLAGb01b52c9e [2019-10-15 00:10:15,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f0704718/ee3594c4e6794a6fadd598d3fa2f5032 [2019-10-15 00:10:15,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:15,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:15,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:15,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:15,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:15,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:15" (1/1) ... [2019-10-15 00:10:15,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:15, skipping insertion in model container [2019-10-15 00:10:15,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:15" (1/1) ... [2019-10-15 00:10:15,237 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:15,363 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:16,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:16,554 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:17,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:17,173 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:17,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17 WrapperNode [2019-10-15 00:10:17,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:17,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:17,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:17,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:17,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17" (1/1) ... [2019-10-15 00:10:17,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17" (1/1) ... [2019-10-15 00:10:17,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17" (1/1) ... [2019-10-15 00:10:17,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17" (1/1) ... [2019-10-15 00:10:17,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17" (1/1) ... [2019-10-15 00:10:17,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17" (1/1) ... [2019-10-15 00:10:17,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17" (1/1) ... [2019-10-15 00:10:17,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:17,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:17,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:17,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:17,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17" (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 00:10:17,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:17,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:17,544 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:17,544 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:17,544 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:17,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:17,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:21,257 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:21,257 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:21,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:21 BoogieIcfgContainer [2019-10-15 00:10:21,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:21,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:21,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:21,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:21,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:15" (1/3) ... [2019-10-15 00:10:21,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c32743c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:21, skipping insertion in model container [2019-10-15 00:10:21,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:17" (2/3) ... [2019-10-15 00:10:21,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c32743c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:21, skipping insertion in model container [2019-10-15 00:10:21,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:21" (3/3) ... [2019-10-15 00:10:21,268 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label30.c [2019-10-15 00:10:21,277 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:21,286 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:21,297 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:21,336 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:21,336 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:21,336 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:21,336 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:21,337 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:21,337 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:21,337 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:21,337 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 00:10:21,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:21,397 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] [2019-10-15 00:10:21,399 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:21,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2051864770, now seen corresponding path program 1 times [2019-10-15 00:10:21,414 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:21,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479278070] [2019-10-15 00:10:21,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:21,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:21,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:21,776 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 00:10:21,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479278070] [2019-10-15 00:10:21,777 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:21,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:21,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449754927] [2019-10-15 00:10:21,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:21,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:21,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:21,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:21,802 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-10-15 00:10:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:29,086 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-10-15 00:10:29,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:29,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2019-10-15 00:10:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:29,148 INFO L225 Difference]: With dead ends: 2970 [2019-10-15 00:10:29,148 INFO L226 Difference]: Without dead ends: 2114 [2019-10-15 00:10:29,168 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 00:10:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-10-15 00:10:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2019-10-15 00:10:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2019-10-15 00:10:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3320 transitions. [2019-10-15 00:10:29,385 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3320 transitions. Word has length 49 [2019-10-15 00:10:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:29,385 INFO L462 AbstractCegarLoop]: Abstraction has 2114 states and 3320 transitions. [2019-10-15 00:10:29,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3320 transitions. [2019-10-15 00:10:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 00:10:29,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:29,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:29,401 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash -600771033, now seen corresponding path program 1 times [2019-10-15 00:10:29,402 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:29,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851303078] [2019-10-15 00:10:29,403 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:29,403 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:29,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:29,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851303078] [2019-10-15 00:10:29,656 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:29,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:29,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843106497] [2019-10-15 00:10:29,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:29,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:29,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:29,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:29,664 INFO L87 Difference]: Start difference. First operand 2114 states and 3320 transitions. Second operand 5 states. [2019-10-15 00:10:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:35,623 INFO L93 Difference]: Finished difference Result 6436 states and 10244 transitions. [2019-10-15 00:10:35,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:35,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-10-15 00:10:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:35,663 INFO L225 Difference]: With dead ends: 6436 [2019-10-15 00:10:35,663 INFO L226 Difference]: Without dead ends: 4328 [2019-10-15 00:10:35,671 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 00:10:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2019-10-15 00:10:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4296. [2019-10-15 00:10:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-10-15 00:10:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6416 transitions. [2019-10-15 00:10:36,198 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6416 transitions. Word has length 118 [2019-10-15 00:10:36,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:36,199 INFO L462 AbstractCegarLoop]: Abstraction has 4296 states and 6416 transitions. [2019-10-15 00:10:36,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6416 transitions. [2019-10-15 00:10:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 00:10:36,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:36,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:36,204 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:36,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:36,208 INFO L82 PathProgramCache]: Analyzing trace with hash -549101798, now seen corresponding path program 1 times [2019-10-15 00:10:36,208 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:36,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310397933] [2019-10-15 00:10:36,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:36,209 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:36,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:36,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310397933] [2019-10-15 00:10:36,410 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:36,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:36,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713930443] [2019-10-15 00:10:36,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:36,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:36,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:36,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:36,418 INFO L87 Difference]: Start difference. First operand 4296 states and 6416 transitions. Second operand 6 states. [2019-10-15 00:10:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:41,354 INFO L93 Difference]: Finished difference Result 10829 states and 16211 transitions. [2019-10-15 00:10:41,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:41,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-15 00:10:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:41,401 INFO L225 Difference]: With dead ends: 10829 [2019-10-15 00:10:41,401 INFO L226 Difference]: Without dead ends: 6539 [2019-10-15 00:10:41,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 00:10:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-10-15 00:10:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6505. [2019-10-15 00:10:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-10-15 00:10:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 8361 transitions. [2019-10-15 00:10:41,603 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 8361 transitions. Word has length 145 [2019-10-15 00:10:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:41,605 INFO L462 AbstractCegarLoop]: Abstraction has 6505 states and 8361 transitions. [2019-10-15 00:10:41,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 8361 transitions. [2019-10-15 00:10:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 00:10:41,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:41,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:41,608 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2053676878, now seen corresponding path program 1 times [2019-10-15 00:10:41,608 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:41,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323609214] [2019-10-15 00:10:41,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:41,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:41,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:41,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323609214] [2019-10-15 00:10:41,797 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:41,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:41,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995952864] [2019-10-15 00:10:41,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:41,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:41,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:41,800 INFO L87 Difference]: Start difference. First operand 6505 states and 8361 transitions. Second operand 4 states. [2019-10-15 00:10:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:47,046 INFO L93 Difference]: Finished difference Result 13004 states and 16722 transitions. [2019-10-15 00:10:47,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:47,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-10-15 00:10:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:47,079 INFO L225 Difference]: With dead ends: 13004 [2019-10-15 00:10:47,079 INFO L226 Difference]: Without dead ends: 6505 [2019-10-15 00:10:47,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6505 states. [2019-10-15 00:10:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6505 to 6505. [2019-10-15 00:10:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-10-15 00:10:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 7877 transitions. [2019-10-15 00:10:47,216 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 7877 transitions. Word has length 155 [2019-10-15 00:10:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:47,216 INFO L462 AbstractCegarLoop]: Abstraction has 6505 states and 7877 transitions. [2019-10-15 00:10:47,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:47,217 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 7877 transitions. [2019-10-15 00:10:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-15 00:10:47,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:47,220 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, 2, 2, 2, 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 00:10:47,220 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:47,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1504581861, now seen corresponding path program 1 times [2019-10-15 00:10:47,221 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:47,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826219235] [2019-10-15 00:10:47,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:47,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:47,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 00:10:47,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826219235] [2019-10-15 00:10:47,378 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:47,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:47,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592627301] [2019-10-15 00:10:47,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:47,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:47,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:47,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:47,380 INFO L87 Difference]: Start difference. First operand 6505 states and 7877 transitions. Second operand 4 states.