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_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:32,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:42:32,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:42:32,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:42:32,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:42:32,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:42:32,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:42:32,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:42:32,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:42:32,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:42:32,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:42:33,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:42:33,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:33,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:33,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:33,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:33,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:33,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:33,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:33,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:33,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:33,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:33,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:33,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:33,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:42:33,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:42:33,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:42:33,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:42:33,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:42:33,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:42:33,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:42:33,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:42:33,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:42:33,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:42:33,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:42:33,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:42:33,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:42:33,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:42:33,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:33,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:33,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:33,033 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 01:42:33,052 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:33,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:33,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:33,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:33,056 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:33,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:33,056 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:33,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:33,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:33,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:33,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:33,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:33,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:33,059 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:33,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:33,059 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:33,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:33,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:33,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:33,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:33,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:33,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:33,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:33,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:33,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:33,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:33,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:33,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:33,062 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 01:42:33,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:33,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:33,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:33,365 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:33,366 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:33,367 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2019-10-15 01:42:33,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4f174d79/acc4f86df3fd4f40a4893d9a257b451d/FLAGc96401dfc [2019-10-15 01:42:34,022 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:34,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2019-10-15 01:42:34,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4f174d79/acc4f86df3fd4f40a4893d9a257b451d/FLAGc96401dfc [2019-10-15 01:42:34,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4f174d79/acc4f86df3fd4f40a4893d9a257b451d [2019-10-15 01:42:34,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:34,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:34,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:34,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:34,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:34,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:34" (1/1) ... [2019-10-15 01:42:34,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b02a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:34, skipping insertion in model container [2019-10-15 01:42:34,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:34" (1/1) ... [2019-10-15 01:42:34,349 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:34,391 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:34,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:34,909 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:35,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:35,027 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:35,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35 WrapperNode [2019-10-15 01:42:35,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:35,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:35,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:35,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:35,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35" (1/1) ... [2019-10-15 01:42:35,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35" (1/1) ... [2019-10-15 01:42:35,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35" (1/1) ... [2019-10-15 01:42:35,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35" (1/1) ... [2019-10-15 01:42:35,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35" (1/1) ... [2019-10-15 01:42:35,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35" (1/1) ... [2019-10-15 01:42:35,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35" (1/1) ... [2019-10-15 01:42:35,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:35,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:35,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:35,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:35,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:35,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:37,330 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:37,330 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:37,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:37 BoogieIcfgContainer [2019-10-15 01:42:37,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:37,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:37,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:37,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:37,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:34" (1/3) ... [2019-10-15 01:42:37,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a565bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:37, skipping insertion in model container [2019-10-15 01:42:37,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:35" (2/3) ... [2019-10-15 01:42:37,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a565bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:37, skipping insertion in model container [2019-10-15 01:42:37,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:37" (3/3) ... [2019-10-15 01:42:37,341 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label40.c [2019-10-15 01:42:37,352 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:37,361 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:37,373 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:37,400 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:37,400 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:37,400 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:37,401 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:37,401 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:37,401 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:37,401 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:37,401 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:37,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:37,434 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 01:42:37,436 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:37,442 INFO L82 PathProgramCache]: Analyzing trace with hash -219368393, now seen corresponding path program 1 times [2019-10-15 01:42:37,450 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:37,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590657963] [2019-10-15 01:42:37,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:37,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:37,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:37,918 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 01:42:37,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590657963] [2019-10-15 01:42:37,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:37,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:42:37,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157698720] [2019-10-15 01:42:37,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:42:37,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:37,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:42:37,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:42:37,950 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 4 states. [2019-10-15 01:42:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:38,867 INFO L93 Difference]: Finished difference Result 361 states and 678 transitions. [2019-10-15 01:42:38,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:42:38,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2019-10-15 01:42:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:38,888 INFO L225 Difference]: With dead ends: 361 [2019-10-15 01:42:38,888 INFO L226 Difference]: Without dead ends: 259 [2019-10-15 01:42:38,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 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 01:42:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-10-15 01:42:38,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 175. [2019-10-15 01:42:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:42:38,964 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:42:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:38,965 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:42:38,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:42:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:42:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:42:38,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:38,971 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 01:42:38,971 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:38,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:38,972 INFO L82 PathProgramCache]: Analyzing trace with hash -701903172, now seen corresponding path program 1 times [2019-10-15 01:42:38,972 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:38,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83706043] [2019-10-15 01:42:38,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:38,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:38,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:39,084 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 01:42:39,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83706043] [2019-10-15 01:42:39,085 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:39,085 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:42:39,085 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961662237] [2019-10-15 01:42:39,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:42:39,087 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:39,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:42:39,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:42:39,088 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 4 states. [2019-10-15 01:42:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:39,813 INFO L93 Difference]: Finished difference Result 681 states and 1261 transitions. [2019-10-15 01:42:39,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:42:39,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-10-15 01:42:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:39,822 INFO L225 Difference]: With dead ends: 681 [2019-10-15 01:42:39,822 INFO L226 Difference]: Without dead ends: 511 [2019-10-15 01:42:39,825 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 01:42:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-10-15 01:42:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2019-10-15 01:42:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-10-15 01:42:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 846 transitions. [2019-10-15 01:42:39,872 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 846 transitions. Word has length 94 [2019-10-15 01:42:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:39,873 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 846 transitions. [2019-10-15 01:42:39,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:42:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 846 transitions. [2019-10-15 01:42:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:42:39,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:39,885 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:39,885 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:39,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1241894341, now seen corresponding path program 1 times [2019-10-15 01:42:39,889 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:39,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152550052] [2019-10-15 01:42:39,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:39,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:39,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:42:40,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152550052] [2019-10-15 01:42:40,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409573028] [2019-10-15 01:42:40,045 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 01:42:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:40,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:40,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:40,275 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:40,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189499016] [2019-10-15 01:42:40,436 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:40,436 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:40,445 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:40,453 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:40,454 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:40,793 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:42,962 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:51,776 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:42:51,889 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-15 01:42:52,046 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-15 01:42:52,282 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:52,305 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:52,578 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2019-10-15 01:42:52,826 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:53,158 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:53,520 WARN L191 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:53,852 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2019-10-15 01:42:54,135 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:54,399 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:54,681 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:55,045 WARN L191 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2019-10-15 01:42:55,814 WARN L191 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 85 [2019-10-15 01:42:56,081 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:42:59,112 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:42:59,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 12] total 22 [2019-10-15 01:42:59,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702107664] [2019-10-15 01:42:59,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:42:59,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:59,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:42:59,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:42:59,116 INFO L87 Difference]: Start difference. First operand 511 states and 846 transitions. Second operand 22 states. [2019-10-15 01:42:59,428 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:59,795 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:43:00,201 WARN L191 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:43:00,621 WARN L191 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2019-10-15 01:43:00,999 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:43:01,372 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:43:01,605 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-10-15 01:43:01,849 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-10-15 01:43:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:04,617 INFO L93 Difference]: Finished difference Result 1235 states and 2161 transitions. [2019-10-15 01:43:04,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:43:04,620 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2019-10-15 01:43:04,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:04,628 INFO L225 Difference]: With dead ends: 1235 [2019-10-15 01:43:04,628 INFO L226 Difference]: Without dead ends: 729 [2019-10-15 01:43:04,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 231 SyntacticMatches, 74 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:43:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2019-10-15 01:43:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 698. [2019-10-15 01:43:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-15 01:43:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1024 transitions. [2019-10-15 01:43:04,702 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1024 transitions. Word has length 104 [2019-10-15 01:43:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:04,702 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1024 transitions. [2019-10-15 01:43:04,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:43:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1024 transitions. [2019-10-15 01:43:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:43:04,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:04,706 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:04,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:04,908 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:04,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1792232590, now seen corresponding path program 1 times [2019-10-15 01:43:04,909 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:04,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905086290] [2019-10-15 01:43:04,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:04,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:04,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:05,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905086290] [2019-10-15 01:43:05,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47248062] [2019-10-15 01:43:05,045 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 01:43:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:05,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:05,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:43:05,215 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:43:05,272 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:43:05,273 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 01:43:05,273 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25312160] [2019-10-15 01:43:05,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:05,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:05,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:05,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:43:05,274 INFO L87 Difference]: Start difference. First operand 698 states and 1024 transitions. Second operand 3 states. [2019-10-15 01:43:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:05,672 INFO L93 Difference]: Finished difference Result 1556 states and 2434 transitions. [2019-10-15 01:43:05,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:05,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-15 01:43:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:05,683 INFO L225 Difference]: With dead ends: 1556 [2019-10-15 01:43:05,683 INFO L226 Difference]: Without dead ends: 694 [2019-10-15 01:43:05,686 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:43:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2019-10-15 01:43:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2019-10-15 01:43:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2019-10-15 01:43:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 974 transitions. [2019-10-15 01:43:05,714 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 974 transitions. Word has length 121 [2019-10-15 01:43:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:05,714 INFO L462 AbstractCegarLoop]: Abstraction has 694 states and 974 transitions. [2019-10-15 01:43:05,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 974 transitions. [2019-10-15 01:43:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:43:05,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:05,718 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 01:43:05,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:05,923 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1303019596, now seen corresponding path program 1 times [2019-10-15 01:43:05,924 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:05,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775310512] [2019-10-15 01:43:05,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:05,925 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:05,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:06,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775310512] [2019-10-15 01:43:06,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809159384] [2019-10-15 01:43:06,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:43:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:06,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:43:06,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:06,183 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:06,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373660455] [2019-10-15 01:43:06,243 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:06,243 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:06,244 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:06,244 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:06,245 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:06,401 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:07,510 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs [2019-10-15 01:43:09,043 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 01:43:09,051 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:43:09,066 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:43:09,112 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:09,126 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:09,352 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2019-10-15 01:43:09,562 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:09,893 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:10,491 WARN L191 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 98 [2019-10-15 01:43:10,746 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73