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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:11,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:11,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:11,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:11,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:11,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:11,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:11,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:11,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:11,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:11,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:11,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:11,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:11,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:11,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:11,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:11,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:11,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:11,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:11,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:11,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:11,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:11,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:11,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:11,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:35:11,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:35:11,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:35:11,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:35:11,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:35:11,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:35:11,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:35:11,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:35:11,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:35:11,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:35:11,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:35:11,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:35:11,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:35:11,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:35:11,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:11,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:11,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:11,266 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 01:35:11,285 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:11,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:11,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:11,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:11,288 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:11,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:11,288 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:11,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:11,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:11,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:11,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:11,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:11,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:11,291 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:11,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:11,291 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:11,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:11,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:11,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:11,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:11,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:11,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:11,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:11,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:11,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:11,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:11,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:11,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:11,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:35:11,581 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:11,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:11,597 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:11,599 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:11,599 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:11,600 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2019-10-15 01:35:11,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a370d58f/cc94c13810c142a9adb05a591ff2f82f/FLAG6f4b901cc [2019-10-15 01:35:12,105 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:12,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2019-10-15 01:35:12,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a370d58f/cc94c13810c142a9adb05a591ff2f82f/FLAG6f4b901cc [2019-10-15 01:35:12,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a370d58f/cc94c13810c142a9adb05a591ff2f82f [2019-10-15 01:35:12,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:12,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:12,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:12,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:12,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:12,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:12" (1/1) ... [2019-10-15 01:35:12,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9b8ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12, skipping insertion in model container [2019-10-15 01:35:12,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:12" (1/1) ... [2019-10-15 01:35:12,527 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:12,546 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:12,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:12,783 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:12,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:12,831 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:12,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12 WrapperNode [2019-10-15 01:35:12,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:12,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:12,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:12,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:12,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12" (1/1) ... [2019-10-15 01:35:12,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12" (1/1) ... [2019-10-15 01:35:12,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12" (1/1) ... [2019-10-15 01:35:12,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12" (1/1) ... [2019-10-15 01:35:12,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12" (1/1) ... [2019-10-15 01:35:12,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12" (1/1) ... [2019-10-15 01:35:12,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12" (1/1) ... [2019-10-15 01:35:12,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:12,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:12,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:12,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:12,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12" (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 01:35:13,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:13,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:13,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:13,038 INFO L138 BoogieDeclarations]: Found implementation of procedure _strcmp [2019-10-15 01:35:13,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:13,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:13,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:13,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:13,039 INFO L130 BoogieDeclarations]: Found specification of procedure _strcmp [2019-10-15 01:35:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:13,390 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:13,390 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:13,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:13 BoogieIcfgContainer [2019-10-15 01:35:13,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:13,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:13,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:13,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:13,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:12" (1/3) ... [2019-10-15 01:35:13,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7353272c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:13, skipping insertion in model container [2019-10-15 01:35:13,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:12" (2/3) ... [2019-10-15 01:35:13,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7353272c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:13, skipping insertion in model container [2019-10-15 01:35:13,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:13" (3/3) ... [2019-10-15 01:35:13,400 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2019-10-15 01:35:13,413 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:13,423 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:13,435 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:13,463 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:13,464 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:13,464 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:13,464 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:13,464 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:13,464 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:13,464 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:13,464 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-15 01:35:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:35:13,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:13,486 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:13,487 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2088925591, now seen corresponding path program 1 times [2019-10-15 01:35:13,501 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:13,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610288463] [2019-10-15 01:35:13,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:13,671 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 01:35:13,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610288463] [2019-10-15 01:35:13,673 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:13,673 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:13,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838541138] [2019-10-15 01:35:13,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:13,678 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:13,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:13,692 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-15 01:35:13,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:13,728 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2019-10-15 01:35:13,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:13,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-15 01:35:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:13,739 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:35:13,739 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:35:13,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:13,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:35:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:35:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:35:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-15 01:35:13,789 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2019-10-15 01:35:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:13,790 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-15 01:35:13,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-15 01:35:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:35:13,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:13,793 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:13,794 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:13,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:13,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1937280848, now seen corresponding path program 1 times [2019-10-15 01:35:13,796 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:13,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784523001] [2019-10-15 01:35:13,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:13,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784523001] [2019-10-15 01:35:13,912 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:13,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:13,912 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101824671] [2019-10-15 01:35:13,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:13,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:13,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:13,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:13,915 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 3 states. [2019-10-15 01:35:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:13,931 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-10-15 01:35:13,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:13,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-15 01:35:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:13,935 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:35:13,935 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:35:13,936 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:35:13,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-10-15 01:35:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:35:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-15 01:35:13,944 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2019-10-15 01:35:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:13,945 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-15 01:35:13,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-15 01:35:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:35:13,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:13,946 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] [2019-10-15 01:35:13,946 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:13,947 INFO L82 PathProgramCache]: Analyzing trace with hash 488260604, now seen corresponding path program 1 times [2019-10-15 01:35:13,947 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:13,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794348232] [2019-10-15 01:35:13,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:14,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794348232] [2019-10-15 01:35:14,025 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:14,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:35:14,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257754094] [2019-10-15 01:35:14,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:35:14,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:14,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:35:14,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:35:14,029 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2019-10-15 01:35:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:14,065 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-10-15 01:35:14,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:35:14,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-15 01:35:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:14,067 INFO L225 Difference]: With dead ends: 38 [2019-10-15 01:35:14,067 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:35:14,068 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:35:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:35:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:35:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:35:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-15 01:35:14,075 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2019-10-15 01:35:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:14,076 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-15 01:35:14,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:35:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-15 01:35:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:35:14,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:14,078 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] [2019-10-15 01:35:14,079 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:14,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:14,079 INFO L82 PathProgramCache]: Analyzing trace with hash 734425716, now seen corresponding path program 1 times [2019-10-15 01:35:14,079 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:14,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403845769] [2019-10-15 01:35:14,080 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:14,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:14,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:14,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403845769] [2019-10-15 01:35:14,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192280999] [2019-10-15 01:35:14,196 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 [2019-10-15 01:35:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:14,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:14,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:14,304 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:14,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [212393505] [2019-10-15 01:35:14,370 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:35:14,370 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:14,377 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:14,384 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:14,385 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:14,592 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:15,065 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:15,077 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:15,083 INFO L199 IcfgInterpreter]: Interpreting procedure _strcmp with input of size 1 for LOIs [2019-10-15 01:35:15,186 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:15,733 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:15,733 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 16] total 22 [2019-10-15 01:35:15,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919273855] [2019-10-15 01:35:15,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:35:15,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:15,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:35:15,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:35:15,740 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 22 states. [2019-10-15 01:35:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:16,516 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2019-10-15 01:35:16,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:35:16,520 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2019-10-15 01:35:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:16,521 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:35:16,521 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 01:35:16,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:35:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 01:35:16,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-10-15 01:35:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:35:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-15 01:35:16,529 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2019-10-15 01:35:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:16,530 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-15 01:35:16,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:35:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-15 01:35:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:35:16,531 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:16,531 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:16,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:16,739 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:16,740 INFO L82 PathProgramCache]: Analyzing trace with hash -138471155, now seen corresponding path program 2 times [2019-10-15 01:35:16,741 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:16,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85865293] [2019-10-15 01:35:16,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:16,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:16,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:16,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85865293] [2019-10-15 01:35:16,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429398466] [2019-10-15 01:35:16,845 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:16,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:35:16,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:16,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:16,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:16,929 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:16,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102625612] [2019-10-15 01:35:16,952 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:35:16,952 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:16,952 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:16,953 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:16,953 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:16,994 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:17,311 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:17,342 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:17,352 INFO L199 IcfgInterpreter]: Interpreting procedure _strcmp with input of size 1 for LOIs [2019-10-15 01:35:17,456 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:17,956 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:17,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 16] total 22 [2019-10-15 01:35:17,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183914767] [2019-10-15 01:35:17,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:35:17,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:35:17,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:35:17,959 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 22 states. [2019-10-15 01:35:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:18,794 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2019-10-15 01:35:18,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:35:18,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2019-10-15 01:35:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:18,796 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:35:18,796 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:35:18,797 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:35:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:35:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-10-15 01:35:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:35:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-15 01:35:18,804 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2019-10-15 01:35:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:18,805 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-15 01:35:18,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:35:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-15 01:35:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:35:18,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:18,806 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:19,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:19,014 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1312642489, now seen corresponding path program 3 times [2019-10-15 01:35:19,014 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:19,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553443852] [2019-10-15 01:35:19,014 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:19,014 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:19,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:19,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553443852] [2019-10-15 01:35:19,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070241787] [2019-10-15 01:35:19,123 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:19,206 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:19,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:19,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:35:19,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:19,233 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:19,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010569319] [2019-10-15 01:35:19,302 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:35:19,302 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:19,303 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:19,303 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:19,303 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:19,333 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:19,592 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:19,603 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:19,608 INFO L199 IcfgInterpreter]: Interpreting procedure _strcmp with input of size 1 for LOIs [2019-10-15 01:35:19,696 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:20,203 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:20,203 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 16] total 28 [2019-10-15 01:35:20,204 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006917439] [2019-10-15 01:35:20,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 01:35:20,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 01:35:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:35:20,206 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 28 states. [2019-10-15 01:35:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:21,434 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-10-15 01:35:21,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-15 01:35:21,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2019-10-15 01:35:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:21,436 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:35:21,437 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:35:21,438 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2019-10-15 01:35:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:35:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2019-10-15 01:35:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-15 01:35:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-10-15 01:35:21,447 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 30 [2019-10-15 01:35:21,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:21,447 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-10-15 01:35:21,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 01:35:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-10-15 01:35:21,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:35:21,448 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:21,448 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:21,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:21,652 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:21,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1306197009, now seen corresponding path program 4 times [2019-10-15 01:35:21,653 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:21,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963545654] [2019-10-15 01:35:21,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:21,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:21,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:21,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963545654] [2019-10-15 01:35:21,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746399189] [2019-10-15 01:35:21,798 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:21,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:35:21,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 01:35:21,957 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 01:35:22,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673945947] [2019-10-15 01:35:22,047 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:35:22,047 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:22,047 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:22,048 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:22,048 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:22,071 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:22,221 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:22,227 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:22,230 INFO L199 IcfgInterpreter]: Interpreting procedure _strcmp with input of size 1 for LOIs [2019-10-15 01:35:22,293 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:22,828 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:22,829 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7, 16] total 38 [2019-10-15 01:35:22,829 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055001785] [2019-10-15 01:35:22,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-15 01:35:22,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:22,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-15 01:35:22,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:35:22,832 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 38 states. [2019-10-15 01:35:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:24,815 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2019-10-15 01:35:24,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-15 01:35:24,819 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2019-10-15 01:35:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:24,821 INFO L225 Difference]: With dead ends: 100 [2019-10-15 01:35:24,821 INFO L226 Difference]: Without dead ends: 64 [2019-10-15 01:35:24,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=641, Invalid=4189, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:35:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-15 01:35:24,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2019-10-15 01:35:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:35:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-10-15 01:35:24,833 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 42 [2019-10-15 01:35:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:24,833 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-10-15 01:35:24,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-15 01:35:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-10-15 01:35:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-15 01:35:24,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:24,835 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:25,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:25,039 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:25,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:25,040 INFO L82 PathProgramCache]: Analyzing trace with hash -333194859, now seen corresponding path program 5 times [2019-10-15 01:35:25,041 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:25,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158413287] [2019-10-15 01:35:25,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:25,042 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:25,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 01:35:25,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158413287] [2019-10-15 01:35:25,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860064615] [2019-10-15 01:35:25,205 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:25,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:25,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:25,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 41 conjunts are in the unsatisfiable core [2019-10-15 01:35:25,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-15 01:35:25,525 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-15 01:35:25,726 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:35:25,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13, 11] total 28 [2019-10-15 01:35:25,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467534688] [2019-10-15 01:35:25,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:35:25,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:35:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:35:25,728 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 10 states. [2019-10-15 01:35:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:25,939 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2019-10-15 01:35:25,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:35:25,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2019-10-15 01:35:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:25,941 INFO L225 Difference]: With dead ends: 63 [2019-10-15 01:35:25,941 INFO L226 Difference]: Without dead ends: 61 [2019-10-15 01:35:25,942 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:35:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-15 01:35:25,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-10-15 01:35:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:35:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-10-15 01:35:25,952 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2019-10-15 01:35:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:25,953 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-10-15 01:35:25,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:35:25,953 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-10-15 01:35:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:35:25,955 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:25,955 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:26,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:26,164 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:26,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:26,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1169298668, now seen corresponding path program 1 times [2019-10-15 01:35:26,165 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:26,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127674643] [2019-10-15 01:35:26,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:26,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:26,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-15 01:35:26,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127674643] [2019-10-15 01:35:26,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557577140] [2019-10-15 01:35:26,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:26,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:35:26,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-10-15 01:35:26,445 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-15 01:35:26,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19013772] [2019-10-15 01:35:26,656 INFO L162 IcfgInterpreter]: Started Sifa with 23 locations of interest [2019-10-15 01:35:26,656 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:26,657 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:26,657 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:26,657 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:26,680 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:27,388 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 101 for LOIs [2019-10-15 01:35:27,399 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:27,403 INFO L199 IcfgInterpreter]: Interpreting procedure _strcmp with input of size 1 for LOIs [2019-10-15 01:35:27,461 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:28,147 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:28,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 17] total 41 [2019-10-15 01:35:28,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545377147] [2019-10-15 01:35:28,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-15 01:35:28,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:28,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-15 01:35:28,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1290, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:35:28,150 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 41 states. [2019-10-15 01:35:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:31,907 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2019-10-15 01:35:31,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:35:31,908 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 57 [2019-10-15 01:35:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:31,909 INFO L225 Difference]: With dead ends: 116 [2019-10-15 01:35:31,910 INFO L226 Difference]: Without dead ends: 72 [2019-10-15 01:35:31,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1003, Invalid=4547, Unknown=0, NotChecked=0, Total=5550 [2019-10-15 01:35:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-15 01:35:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-15 01:35:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-15 01:35:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-10-15 01:35:31,924 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 57 [2019-10-15 01:35:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:31,924 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-10-15 01:35:31,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-15 01:35:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-10-15 01:35:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-15 01:35:31,926 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:31,926 INFO L380 BasicCegarLoop]: trace histogram [22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:32,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:32,131 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:32,131 INFO L82 PathProgramCache]: Analyzing trace with hash 493864876, now seen corresponding path program 2 times [2019-10-15 01:35:32,132 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:32,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400319533] [2019-10-15 01:35:32,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:32,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:32,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-15 01:35:32,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400319533] [2019-10-15 01:35:32,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136102032] [2019-10-15 01:35:32,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:32,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 01:35:32,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:32,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-15 01:35:32,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:35,209 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.base_BEFORE_CALL_55| Int) (|v_main_~#b~0.base_BEFORE_CALL_55| Int)) (and (= (select (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_55|) 4) (select (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_55|) 4)) (not (= |v_main_~#a~0.base_BEFORE_CALL_55| |v_main_~#b~0.base_BEFORE_CALL_55|)))) is different from true [2019-10-15 01:35:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 334 trivial. 2 not checked. [2019-10-15 01:35:35,418 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 40 proven. 4 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2019-10-15 01:35:35,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141560786] [2019-10-15 01:35:35,818 INFO L162 IcfgInterpreter]: Started Sifa with 23 locations of interest [2019-10-15 01:35:35,818 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:35,818 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:35,819 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:35,819 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:35,839 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:36,569 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2019-10-15 01:35:36,578 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:36,581 INFO L199 IcfgInterpreter]: Interpreting procedure _strcmp with input of size 1 for LOIs [2019-10-15 01:35:36,625 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:37,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:37,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 12, 17] total 61 [2019-10-15 01:35:37,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18756202] [2019-10-15 01:35:37,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 01:35:37,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:37,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 01:35:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=3126, Unknown=1, NotChecked=116, Total=3660 [2019-10-15 01:35:37,777 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 61 states. [2019-10-15 01:35:41,900 WARN L191 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-10-15 01:35:42,803 WARN L191 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-10-15 01:35:44,514 WARN L191 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 85