/usr/bin/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_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:39:44,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:39:44,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:39:44,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:39:45,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:39:45,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:39:45,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:39:45,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:39:45,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:39:45,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:39:45,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:39:45,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:39:45,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:39:45,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:39:45,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:39:45,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:39:45,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:39:45,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:39:45,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:39:45,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:39:45,062 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 [2019-11-07 01:39:45,096 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:39:45,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:39:45,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:39:45,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:39:45,103 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:39:45,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:39:45,103 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:39:45,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:39:45,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:39:45,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:39:45,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:39:45,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:39:45,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:39:45,107 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:39:45,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:39:45,108 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:39:45,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:39:45,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:39:45,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:39:45,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:39:45,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:39:45,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:39:45,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:39:45,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:39:45,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:39:45,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:39:45,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:39:45,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:39:45,114 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 [2019-11-07 01:39:45,391 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:39:45,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:39:45,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:39:45,409 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:39:45,409 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:39:45,410 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label41.c [2019-11-07 01:39:45,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b89be5021/5e7d3d53ea524d819a8e9d8b3250aa24/FLAG00fa61edf [2019-11-07 01:39:46,076 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:39:46,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label41.c [2019-11-07 01:39:46,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b89be5021/5e7d3d53ea524d819a8e9d8b3250aa24/FLAG00fa61edf [2019-11-07 01:39:46,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b89be5021/5e7d3d53ea524d819a8e9d8b3250aa24 [2019-11-07 01:39:46,321 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:39:46,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:39:46,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:39:46,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:39:46,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:39:46,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:46" (1/1) ... [2019-11-07 01:39:46,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e07c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:46, skipping insertion in model container [2019-11-07 01:39:46,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:46" (1/1) ... [2019-11-07 01:39:46,340 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:39:46,402 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:39:46,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:39:46,845 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:39:47,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:39:47,110 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:39:47,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47 WrapperNode [2019-11-07 01:39:47,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:39:47,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:39:47,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:39:47,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:39:47,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47" (1/1) ... [2019-11-07 01:39:47,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47" (1/1) ... [2019-11-07 01:39:47,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47" (1/1) ... [2019-11-07 01:39:47,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47" (1/1) ... [2019-11-07 01:39:47,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47" (1/1) ... [2019-11-07 01:39:47,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47" (1/1) ... [2019-11-07 01:39:47,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47" (1/1) ... [2019-11-07 01:39:47,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:39:47,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:39:47,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:39:47,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:39:47,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47" (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 [2019-11-07 01:39:47,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:39:47,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:39:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:39:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:39:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:39:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:39:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:39:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:39:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:39:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:39:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:39:49,381 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:39:49,382 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:39:49,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:49 BoogieIcfgContainer [2019-11-07 01:39:49,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:39:49,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:39:49,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:39:49,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:39:49,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:46" (1/3) ... [2019-11-07 01:39:49,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76734e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:49, skipping insertion in model container [2019-11-07 01:39:49,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:47" (2/3) ... [2019-11-07 01:39:49,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76734e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:49, skipping insertion in model container [2019-11-07 01:39:49,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:49" (3/3) ... [2019-11-07 01:39:49,392 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label41.c [2019-11-07 01:39:49,403 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:39:49,411 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:39:49,423 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:39:49,449 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:39:49,450 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:39:49,450 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:39:49,450 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:39:49,450 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:39:49,450 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:39:49,451 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:39:49,451 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:39:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:39:49,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:39:49,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:49,484 INFO L410 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] [2019-11-07 01:39:49,486 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:49,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash -219368137, now seen corresponding path program 1 times [2019-11-07 01:39:49,503 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:49,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412319253] [2019-11-07 01:39:49,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:49,977 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412319253] [2019-11-07 01:39:49,978 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:49,978 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:39:49,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402229475] [2019-11-07 01:39:49,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:39:49,986 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:39:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:50,004 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:39:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:50,639 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:39:50,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:39:50,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:39:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:50,667 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:39:50,667 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:39:50,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:39:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:39:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:39:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2019-11-07 01:39:50,782 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2019-11-07 01:39:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:50,783 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2019-11-07 01:39:50,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:39:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2019-11-07 01:39:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-07 01:39:50,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:50,799 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:50,799 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash 656209002, now seen corresponding path program 1 times [2019-11-07 01:39:50,800 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:50,801 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993040353] [2019-11-07 01:39:50,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:50,984 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993040353] [2019-11-07 01:39:50,984 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:50,984 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:39:50,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346204284] [2019-11-07 01:39:50,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:39:50,987 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:50,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:39:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:39:50,988 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand 6 states. [2019-11-07 01:39:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:51,666 INFO L93 Difference]: Finished difference Result 531 states and 984 transitions. [2019-11-07 01:39:51,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:39:51,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-11-07 01:39:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:51,671 INFO L225 Difference]: With dead ends: 531 [2019-11-07 01:39:51,672 INFO L226 Difference]: Without dead ends: 361 [2019-11-07 01:39:51,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:39:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-11-07 01:39:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 355. [2019-11-07 01:39:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-11-07 01:39:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 632 transitions. [2019-11-07 01:39:51,712 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 632 transitions. Word has length 104 [2019-11-07 01:39:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:51,712 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 632 transitions. [2019-11-07 01:39:51,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:39:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 632 transitions. [2019-11-07 01:39:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-07 01:39:51,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:51,715 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:51,715 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:51,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:51,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1784864925, now seen corresponding path program 1 times [2019-11-07 01:39:51,716 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:51,716 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158718696] [2019-11-07 01:39:51,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:51,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158718696] [2019-11-07 01:39:51,868 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:51,868 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:39:51,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148549344] [2019-11-07 01:39:51,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:39:51,871 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:51,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:39:51,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:51,872 INFO L87 Difference]: Start difference. First operand 355 states and 632 transitions. Second operand 3 states. [2019-11-07 01:39:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:52,343 INFO L93 Difference]: Finished difference Result 963 states and 1743 transitions. [2019-11-07 01:39:52,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:39:52,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-11-07 01:39:52,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:52,350 INFO L225 Difference]: With dead ends: 963 [2019-11-07 01:39:52,350 INFO L226 Difference]: Without dead ends: 613 [2019-11-07 01:39:52,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:52,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2019-11-07 01:39:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2019-11-07 01:39:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2019-11-07 01:39:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 981 transitions. [2019-11-07 01:39:52,399 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 981 transitions. Word has length 105 [2019-11-07 01:39:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:52,400 INFO L462 AbstractCegarLoop]: Abstraction has 613 states and 981 transitions. [2019-11-07 01:39:52,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:39:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 981 transitions. [2019-11-07 01:39:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-07 01:39:52,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:52,404 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:52,404 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1660922037, now seen corresponding path program 1 times [2019-11-07 01:39:52,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:52,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353977403] [2019-11-07 01:39:52,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:52,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353977403] [2019-11-07 01:39:52,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346759718] [2019-11-07 01:39:52,503 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 [2019-11-07 01:39:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:52,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 01:39:52,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:39:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:39:52,759 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:39:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:39:52,875 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:39:52,875 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2019-11-07 01:39:52,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052100420] [2019-11-07 01:39:52,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 01:39:52,877 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 01:39:52,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:39:52,878 INFO L87 Difference]: Start difference. First operand 613 states and 981 transitions. Second operand 7 states. [2019-11-07 01:39:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:53,471 INFO L93 Difference]: Finished difference Result 1599 states and 2650 transitions. [2019-11-07 01:39:53,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:39:53,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-11-07 01:39:53,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:53,481 INFO L225 Difference]: With dead ends: 1599 [2019-11-07 01:39:53,481 INFO L226 Difference]: Without dead ends: 991 [2019-11-07 01:39:53,484 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:39:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-11-07 01:39:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 891. [2019-11-07 01:39:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-11-07 01:39:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1461 transitions. [2019-11-07 01:39:53,574 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1461 transitions. Word has length 113 [2019-11-07 01:39:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:53,575 INFO L462 AbstractCegarLoop]: Abstraction has 891 states and 1461 transitions. [2019-11-07 01:39:53,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 01:39:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1461 transitions. [2019-11-07 01:39:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 01:39:53,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:53,579 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:53,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:39:53,787 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:53,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1191501040, now seen corresponding path program 1 times [2019-11-07 01:39:53,789 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:53,789 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201186089] [2019-11-07 01:39:53,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:39:53,890 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201186089] [2019-11-07 01:39:53,890 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205599843] [2019-11-07 01:39:53,891 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 [2019-11-07 01:39:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:53,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:39:54,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:39:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 01:39:54,064 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:39:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:39:54,160 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22861761] [2019-11-07 01:39:54,210 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:39:54,210 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:39:54,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:39:54,223 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:39:54,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:39:54,407 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:39:55,404 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 85 for LOIs [2019-11-07 01:39:56,773 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-11-07 01:39:56,842 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-11-07 01:39:56,954 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-11-07 01:39:57,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:39:57,706 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:39:57,941 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2019-11-07 01:39:58,278 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:39:58,823 WARN L191 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 91 [2019-11-07 01:39:59,535 WARN L191 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 96 [2019-11-07 01:39:59,830 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-11-07 01:40:00,086 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2019-11-07 01:40:00,329 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-11-07 01:40:00,615 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2019-11-07 01:40:00,994 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 74 [2019-11-07 01:40:01,340 WARN L191 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2019-11-07 01:40:01,513 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2019-11-07 01:40:01,906 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2019-11-07 01:40:02,298 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2019-11-07 01:40:02,769 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2019-11-07 01:40:03,107 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2019-11-07 01:40:03,529 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:40:03,924 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-11-07 01:40:04,230 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:40:04,548 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:40:04,863 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:40:05,327 WARN L191 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2019-11-07 01:40:05,634 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2019-11-07 01:40:06,254 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:40:06,644 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:40:06,984 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:40:07,326 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2019-11-07 01:40:07,838 WARN L191 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2019-11-07 01:40:08,017 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:40:08,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 29] total 40 [2019-11-07 01:40:08,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024608703] [2019-11-07 01:40:08,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-07 01:40:08,020 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:08,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-07 01:40:08,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:40:08,021 INFO L87 Difference]: Start difference. First operand 891 states and 1461 transitions. Second operand 40 states. [2019-11-07 01:40:08,221 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:40:08,537 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 87 [2019-11-07 01:40:09,010 WARN L191 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 98 [2019-11-07 01:40:09,584 WARN L191 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 93 [2019-11-07 01:40:09,976 WARN L191 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2019-11-07 01:40:10,577 WARN L191 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 94 [2019-11-07 01:40:10,962 WARN L191 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 96 [2019-11-07 01:40:11,363 WARN L191 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 75 [2019-11-07 01:40:11,720 WARN L191 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 72 [2019-11-07 01:40:12,015 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2019-11-07 01:40:12,596 WARN L191 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 112 [2019-11-07 01:40:12,918 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2019-11-07 01:40:13,118 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-11-07 01:40:13,554 WARN L191 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 95 [2019-11-07 01:40:13,923 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2019-11-07 01:40:14,401 WARN L191 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 103 [2019-11-07 01:40:14,908 WARN L191 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 75 [2019-11-07 01:40:15,387 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 72 [2019-11-07 01:40:15,717 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2019-11-07 01:40:16,432 WARN L191 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 111 [2019-11-07 01:40:16,929 WARN L191 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 109 [2019-11-07 01:40:17,313 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2019-11-07 01:40:17,965 WARN L191 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 94 [2019-11-07 01:40:18,406 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 96 [2019-11-07 01:40:18,977 WARN L191 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 116 [2019-11-07 01:40:19,842 WARN L191 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 122 [2019-11-07 01:40:20,661 WARN L191 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 123 [2019-11-07 01:40:21,609 WARN L191 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 112 [2019-11-07 01:40:22,155 WARN L191 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 96 [2019-11-07 01:40:23,076 WARN L191 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 123 [2019-11-07 01:40:24,541 WARN L191 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 101 [2019-11-07 01:40:25,364 WARN L191 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 130 [2019-11-07 01:40:26,103 WARN L191 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 124 [2019-11-07 01:40:26,742 WARN L191 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 112