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/eca-rers2012/Problem02_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:11,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:43:11,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:43:11,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:43:11,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:43:11,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:43:11,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:43:11,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:43:11,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:43:11,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:43:11,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:43:11,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:43:11,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:11,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:11,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:11,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:11,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:11,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:11,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:11,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:11,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:11,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:11,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:11,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:11,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:43:11,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:43:11,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:43:11,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:43:11,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:43:11,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:43:11,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:43:11,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:43:11,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:43:11,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:43:11,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:43:11,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:43:11,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:43:11,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:43:11,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:11,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:11,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:11,236 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 01:43:11,250 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:11,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:11,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:11,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:11,252 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:11,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:11,253 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:11,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:11,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:11,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:11,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:11,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:11,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:11,254 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:11,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:11,254 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:11,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:11,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:11,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:11,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:11,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:11,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:11,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:11,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:11,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:11,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:11,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:11,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:11,257 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 01:43:11,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:11,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:11,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:11,621 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:11,621 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:11,622 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2019-10-15 01:43:11,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a309e9f/ab155372b5f14f1b869a555a25b06f8f/FLAG7634a4a54 [2019-10-15 01:43:12,241 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:12,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2019-10-15 01:43:12,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a309e9f/ab155372b5f14f1b869a555a25b06f8f/FLAG7634a4a54 [2019-10-15 01:43:12,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a309e9f/ab155372b5f14f1b869a555a25b06f8f [2019-10-15 01:43:12,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:12,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:12,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:12,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:12,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:12,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:12" (1/1) ... [2019-10-15 01:43:12,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afc9091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:12, skipping insertion in model container [2019-10-15 01:43:12,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:12" (1/1) ... [2019-10-15 01:43:12,505 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:12,573 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:12,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:12,954 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:13,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:13,199 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:13,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13 WrapperNode [2019-10-15 01:43:13,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:13,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:13,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:13,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:13,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13" (1/1) ... [2019-10-15 01:43:13,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13" (1/1) ... [2019-10-15 01:43:13,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13" (1/1) ... [2019-10-15 01:43:13,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13" (1/1) ... [2019-10-15 01:43:13,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13" (1/1) ... [2019-10-15 01:43:13,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13" (1/1) ... [2019-10-15 01:43:13,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13" (1/1) ... [2019-10-15 01:43:13,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:13,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:13,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:13,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:13,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13" (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 01:43:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:13,358 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:13,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:13,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:13,359 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:13,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:13,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:13,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:15,366 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:15,367 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:15,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:15 BoogieIcfgContainer [2019-10-15 01:43:15,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:15,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:15,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:15,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:15,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:12" (1/3) ... [2019-10-15 01:43:15,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12dd8e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:15, skipping insertion in model container [2019-10-15 01:43:15,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:13" (2/3) ... [2019-10-15 01:43:15,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12dd8e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:15, skipping insertion in model container [2019-10-15 01:43:15,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:15" (3/3) ... [2019-10-15 01:43:15,378 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label55.c [2019-10-15 01:43:15,388 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:15,397 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:15,409 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:15,436 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:15,437 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:15,437 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:15,437 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:15,437 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:15,437 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:15,438 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:15,438 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:43:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:43:15,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:15,472 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:15,474 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:15,480 INFO L82 PathProgramCache]: Analyzing trace with hash -219364297, now seen corresponding path program 1 times [2019-10-15 01:43:15,490 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:15,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864075265] [2019-10-15 01:43:15,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:15,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:15,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:15,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864075265] [2019-10-15 01:43:15,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:15,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:15,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689089569] [2019-10-15 01:43:15,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:15,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:15,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:15,970 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:43:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:16,522 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:43:16,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:16,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:43:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:16,548 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:43:16,548 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:43:16,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:43:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:43:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:43:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:43:16,654 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:43:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:16,655 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:43:16,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:43:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:43:16,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:16,670 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:16,671 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash -701899076, now seen corresponding path program 1 times [2019-10-15 01:43:16,673 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:16,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148463440] [2019-10-15 01:43:16,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:16,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:16,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:16,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148463440] [2019-10-15 01:43:16,880 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:16,880 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:43:16,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869300613] [2019-10-15 01:43:16,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:43:16,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:16,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:43:16,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:43:16,883 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 4 states. [2019-10-15 01:43:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:17,708 INFO L93 Difference]: Finished difference Result 681 states and 1263 transitions. [2019-10-15 01:43:17,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:43:17,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-10-15 01:43:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:17,715 INFO L225 Difference]: With dead ends: 681 [2019-10-15 01:43:17,715 INFO L226 Difference]: Without dead ends: 511 [2019-10-15 01:43:17,718 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 01:43:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-10-15 01:43:17,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 427. [2019-10-15 01:43:17,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-15 01:43:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 727 transitions. [2019-10-15 01:43:17,753 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 727 transitions. Word has length 94 [2019-10-15 01:43:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:17,754 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 727 transitions. [2019-10-15 01:43:17,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:43:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 727 transitions. [2019-10-15 01:43:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 01:43:17,759 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:17,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:17,759 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash -650188957, now seen corresponding path program 1 times [2019-10-15 01:43:17,760 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:17,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084693458] [2019-10-15 01:43:17,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:17,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:17,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:17,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084693458] [2019-10-15 01:43:17,948 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:17,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:17,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405159753] [2019-10-15 01:43:17,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:17,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:17,956 INFO L87 Difference]: Start difference. First operand 427 states and 727 transitions. Second operand 3 states. [2019-10-15 01:43:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:18,457 INFO L93 Difference]: Finished difference Result 1269 states and 2235 transitions. [2019-10-15 01:43:18,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:18,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-15 01:43:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:18,473 INFO L225 Difference]: With dead ends: 1269 [2019-10-15 01:43:18,473 INFO L226 Difference]: Without dead ends: 847 [2019-10-15 01:43:18,485 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2019-10-15 01:43:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2019-10-15 01:43:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2019-10-15 01:43:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1392 transitions. [2019-10-15 01:43:18,569 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1392 transitions. Word has length 110 [2019-10-15 01:43:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:18,571 INFO L462 AbstractCegarLoop]: Abstraction has 847 states and 1392 transitions. [2019-10-15 01:43:18,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1392 transitions. [2019-10-15 01:43:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:43:18,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:18,579 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:18,580 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash 482298052, now seen corresponding path program 1 times [2019-10-15 01:43:18,580 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:18,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854667100] [2019-10-15 01:43:18,581 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:18,581 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:18,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:18,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854667100] [2019-10-15 01:43:18,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570581978] [2019-10-15 01:43:18,735 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 01:43:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:18,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:43:18,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:43:19,008 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:19,121 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:43:19,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:43:19,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629760263] [2019-10-15 01:43:19,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:43:19,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:19,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:43:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:43:19,124 INFO L87 Difference]: Start difference. First operand 847 states and 1392 transitions. Second operand 5 states. [2019-10-15 01:43:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:19,512 INFO L93 Difference]: Finished difference Result 1689 states and 2830 transitions. [2019-10-15 01:43:19,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:43:19,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-15 01:43:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:19,520 INFO L225 Difference]: With dead ends: 1689 [2019-10-15 01:43:19,521 INFO L226 Difference]: Without dead ends: 847 [2019-10-15 01:43:19,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 258 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:43:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2019-10-15 01:43:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2019-10-15 01:43:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2019-10-15 01:43:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1251 transitions. [2019-10-15 01:43:19,555 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1251 transitions. Word has length 132 [2019-10-15 01:43:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:19,556 INFO L462 AbstractCegarLoop]: Abstraction has 847 states and 1251 transitions. [2019-10-15 01:43:19,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:43:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1251 transitions. [2019-10-15 01:43:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:43:19,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:19,560 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:19,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:19,766 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:19,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:19,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1609783538, now seen corresponding path program 1 times [2019-10-15 01:43:19,767 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:19,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953751782] [2019-10-15 01:43:19,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:19,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:19,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:20,054 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953751782] [2019-10-15 01:43:20,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123862022] [2019-10-15 01:43:20,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:43:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:20,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:20,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:20,312 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:20,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362224410] [2019-10-15 01:43:20,442 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:20,443 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:20,448 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:20,459 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:20,460 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:20,716 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-15 01:43:21,391 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2019-10-15 01:43:22,022 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 123 [2019-10-15 01:43:22,556 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2019-10-15 01:43:23,582 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-10-15 01:43:28,182 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:43:28,285 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8031 conjuctions. This might take some time... [2019-10-15 01:43:28,544 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 26 [2019-10-15 01:43:28,647 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7590 conjuctions. This might take some time... [2019-10-15 01:43:28,816 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 26 [2019-10-15 01:43:28,900 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7590 conjuctions. This might take some time... [2019-10-15 01:43:29,120 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:29,132 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:29,421 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2019-10-15 01:43:29,642 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:29,945 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:30,233 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:43:30,738 WARN L191 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 79 [2019-10-15 01:43:31,002 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2019-10-15 01:43:31,230 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-10-15 01:43:31,479 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2019-10-15 01:43:31,712 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-10-15 01:43:32,082 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-10-15 01:43:32,979 WARN L191 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 82 [2019-10-15 01:43:36,290 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:36,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 12] total 27 [2019-10-15 01:43:36,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917978683] [2019-10-15 01:43:36,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-15 01:43:36,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:36,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-15 01:43:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:43:36,294 INFO L87 Difference]: Start difference. First operand 847 states and 1251 transitions. Second operand 27 states. [2019-10-15 01:43:36,629 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:37,001 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:43:37,423 WARN L191 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:43:37,833 WARN L191 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2019-10-15 01:43:38,172 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:43:38,520 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:43:38,715 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2019-10-15 01:43:38,933 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2019-10-15 01:43:39,232 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2019-10-15 01:43:39,745 WARN L191 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2019-10-15 01:43:39,981 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2019-10-15 01:43:40,242 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2019-10-15 01:43:40,605 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2019-10-15 01:43:40,893 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2019-10-15 01:43:41,502 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2019-10-15 01:43:43,465 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-10-15 01:43:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:48,814 INFO L93 Difference]: Finished difference Result 2359 states and 3854 transitions. [2019-10-15 01:43:48,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-15 01:43:48,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 135 [2019-10-15 01:43:48,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:48,830 INFO L225 Difference]: With dead ends: 2359 [2019-10-15 01:43:48,831 INFO L226 Difference]: Without dead ends: 1517 [2019-10-15 01:43:48,836 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 307 SyntacticMatches, 103 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1238, Invalid=4312, Unknown=0, NotChecked=0, Total=5550 [2019-10-15 01:43:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2019-10-15 01:43:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1436. [2019-10-15 01:43:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-15 01:43:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1984 transitions. [2019-10-15 01:43:48,905 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1984 transitions. Word has length 135 [2019-10-15 01:43:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:48,906 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 1984 transitions. [2019-10-15 01:43:48,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-15 01:43:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1984 transitions. [2019-10-15 01:43:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 01:43:48,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:48,911 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, 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] [2019-10-15 01:43:49,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:49,116 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1980561555, now seen corresponding path program 1 times [2019-10-15 01:43:49,117 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:49,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003108285] [2019-10-15 01:43:49,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:49,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:49,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat