/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/Problem03_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:42:57,209 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:42:57,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:42:57,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:42:57,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:42:57,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:42:57,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:42:57,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:42:57,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:42:57,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:42:57,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:42:57,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:42:57,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:42:57,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:42:57,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:42:57,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:42:57,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:42:57,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:42:57,265 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 01:42:57,282 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:42:57,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:42:57,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:42:57,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:42:57,284 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:42:57,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:42:57,285 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:42:57,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:42:57,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:42:57,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:42:57,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:42:57,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:42:57,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:42:57,289 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:42:57,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:42:57,289 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:42:57,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:42:57,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:42:57,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:42:57,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:42:57,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:42:57,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:42:57,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:42:57,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:42:57,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:42:57,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:42:57,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:42:57,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:42:57,292 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 01:42:57,573 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:42:57,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:42:57,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:42:57,591 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:42:57,591 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:42:57,592 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2019-11-07 01:42:57,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ce88e335/4f44bc103c744c8783bc2d37229425b3/FLAGc21dfb8f0 [2019-11-07 01:42:58,352 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:42:58,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2019-11-07 01:42:58,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ce88e335/4f44bc103c744c8783bc2d37229425b3/FLAGc21dfb8f0 [2019-11-07 01:42:58,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ce88e335/4f44bc103c744c8783bc2d37229425b3 [2019-11-07 01:42:58,533 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:42:58,535 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:42:58,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:42:58,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:42:58,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:42:58,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:58" (1/1) ... [2019-11-07 01:42:58,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a38f3bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:58, skipping insertion in model container [2019-11-07 01:42:58,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:58" (1/1) ... [2019-11-07 01:42:58,552 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:42:58,620 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:42:59,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:42:59,481 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:42:59,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:42:59,803 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:42:59,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59 WrapperNode [2019-11-07 01:42:59,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:42:59,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:42:59,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:42:59,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:42:59,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2019-11-07 01:42:59,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2019-11-07 01:42:59,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2019-11-07 01:42:59,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2019-11-07 01:42:59,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2019-11-07 01:42:59,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2019-11-07 01:42:59,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2019-11-07 01:42:59,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:42:59,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:42:59,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:42:59,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:42:59,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (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 01:43:00,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:43:00,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:43:00,031 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:43:00,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:43:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:43:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:43:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:43:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:43:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:43:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:43:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:43:03,209 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:43:03,209 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:43:03,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:03 BoogieIcfgContainer [2019-11-07 01:43:03,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:43:03,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:43:03,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:43:03,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:43:03,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:58" (1/3) ... [2019-11-07 01:43:03,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371490a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:03, skipping insertion in model container [2019-11-07 01:43:03,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (2/3) ... [2019-11-07 01:43:03,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371490a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:03, skipping insertion in model container [2019-11-07 01:43:03,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:03" (3/3) ... [2019-11-07 01:43:03,233 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label58.c [2019-11-07 01:43:03,248 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:43:03,256 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:43:03,268 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:43:03,299 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:43:03,299 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:43:03,299 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:43:03,299 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:43:03,299 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:43:03,300 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:43:03,300 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:43:03,300 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:43:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-11-07 01:43:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 01:43:03,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:43:03,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:03,353 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:43:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:43:03,359 INFO L82 PathProgramCache]: Analyzing trace with hash 136468006, now seen corresponding path program 1 times [2019-11-07 01:43:03,370 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:43:03,370 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023484917] [2019-11-07 01:43:03,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:43:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:43:04,263 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 01:43:04,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023484917] [2019-11-07 01:43:04,265 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:43:04,265 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:43:04,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318528654] [2019-11-07 01:43:04,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:43:04,276 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:43:04,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:43:04,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:43:04,294 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2019-11-07 01:43:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:43:06,152 INFO L93 Difference]: Finished difference Result 613 states and 1182 transitions. [2019-11-07 01:43:06,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:43:06,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-11-07 01:43:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:43:06,179 INFO L225 Difference]: With dead ends: 613 [2019-11-07 01:43:06,179 INFO L226 Difference]: Without dead ends: 448 [2019-11-07 01:43:06,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:43:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2019-11-07 01:43:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 301. [2019-11-07 01:43:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-07 01:43:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 579 transitions. [2019-11-07 01:43:06,271 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 579 transitions. Word has length 149 [2019-11-07 01:43:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:43:06,273 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 579 transitions. [2019-11-07 01:43:06,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:43:06,273 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 579 transitions. [2019-11-07 01:43:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-07 01:43:06,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:43:06,283 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:06,283 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:43:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:43:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash -660050486, now seen corresponding path program 1 times [2019-11-07 01:43:06,285 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:43:06,286 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400058564] [2019-11-07 01:43:06,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:43:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:43:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:43:06,466 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400058564] [2019-11-07 01:43:06,466 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:43:06,467 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 01:43:06,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913089379] [2019-11-07 01:43:06,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 01:43:06,469 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:43:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 01:43:06,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:43:06,470 INFO L87 Difference]: Start difference. First operand 301 states and 579 transitions. Second operand 7 states. [2019-11-07 01:43:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:43:08,120 INFO L93 Difference]: Finished difference Result 945 states and 1905 transitions. [2019-11-07 01:43:08,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 01:43:08,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-11-07 01:43:08,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:43:08,130 INFO L225 Difference]: With dead ends: 945 [2019-11-07 01:43:08,130 INFO L226 Difference]: Without dead ends: 649 [2019-11-07 01:43:08,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:43:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2019-11-07 01:43:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 603. [2019-11-07 01:43:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 01:43:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1154 transitions. [2019-11-07 01:43:08,206 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1154 transitions. Word has length 165 [2019-11-07 01:43:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:43:08,207 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1154 transitions. [2019-11-07 01:43:08,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 01:43:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1154 transitions. [2019-11-07 01:43:08,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 01:43:08,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:43:08,213 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:08,213 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:43:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:43:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1566262061, now seen corresponding path program 1 times [2019-11-07 01:43:08,214 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:43:08,214 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898480197] [2019-11-07 01:43:08,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:43:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:43:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:43:08,343 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898480197] [2019-11-07 01:43:08,344 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:43:08,344 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:43:08,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585332209] [2019-11-07 01:43:08,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:43:08,348 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:43:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:43:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:43:08,349 INFO L87 Difference]: Start difference. First operand 603 states and 1154 transitions. Second operand 6 states. [2019-11-07 01:43:10,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:43:10,088 INFO L93 Difference]: Finished difference Result 1859 states and 3754 transitions. [2019-11-07 01:43:10,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:43:10,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2019-11-07 01:43:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:43:10,106 INFO L225 Difference]: With dead ends: 1859 [2019-11-07 01:43:10,106 INFO L226 Difference]: Without dead ends: 1261 [2019-11-07 01:43:10,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 01:43:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2019-11-07 01:43:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1213. [2019-11-07 01:43:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2019-11-07 01:43:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2319 transitions. [2019-11-07 01:43:10,181 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2319 transitions. Word has length 166 [2019-11-07 01:43:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:43:10,181 INFO L462 AbstractCegarLoop]: Abstraction has 1213 states and 2319 transitions. [2019-11-07 01:43:10,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:43:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2319 transitions. [2019-11-07 01:43:10,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-07 01:43:10,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:43:10,188 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:10,188 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:43:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:43:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1427323489, now seen corresponding path program 1 times [2019-11-07 01:43:10,189 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:43:10,189 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266830165] [2019-11-07 01:43:10,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:43:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:43:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:43:10,312 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266830165] [2019-11-07 01:43:10,312 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547868882] [2019-11-07 01:43:10,312 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 01:43:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:43:10,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:43:10,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:43:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 01:43:10,904 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:43:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:43:11,061 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:43:11,061 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:43:11,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138007464] [2019-11-07 01:43:11,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:43:11,062 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:43:11,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:43:11,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:43:11,064 INFO L87 Difference]: Start difference. First operand 1213 states and 2319 transitions. Second operand 5 states. [2019-11-07 01:43:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:43:11,640 INFO L93 Difference]: Finished difference Result 3697 states and 7337 transitions. [2019-11-07 01:43:11,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:43:11,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2019-11-07 01:43:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:43:11,665 INFO L225 Difference]: With dead ends: 3697 [2019-11-07 01:43:11,665 INFO L226 Difference]: Without dead ends: 2489 [2019-11-07 01:43:11,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-07 01:43:11,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2019-11-07 01:43:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2451. [2019-11-07 01:43:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2451 states. [2019-11-07 01:43:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 4764 transitions. [2019-11-07 01:43:11,819 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 4764 transitions. Word has length 174 [2019-11-07 01:43:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:43:11,820 INFO L462 AbstractCegarLoop]: Abstraction has 2451 states and 4764 transitions. [2019-11-07 01:43:11,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:43:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 4764 transitions. [2019-11-07 01:43:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-07 01:43:11,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:43:11,832 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:12,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:43:12,037 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:43:12,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:43:12,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1874744906, now seen corresponding path program 1 times [2019-11-07 01:43:12,038 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:43:12,038 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635386103] [2019-11-07 01:43:12,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:43:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:43:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:43:12,323 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635386103] [2019-11-07 01:43:12,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187093728] [2019-11-07 01:43:12,324 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 01:43:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:43:12,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:43:12,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:43:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:43:12,882 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:43:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:43:13,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294765734] [2019-11-07 01:43:13,051 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-11-07 01:43:13,051 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:43:13,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:43:13,070 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:43:13,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:43:13,410 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-11-07 01:43:14,353 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 253 [2019-11-07 01:43:14,864 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 292 [2019-11-07 01:43:15,441 WARN L191 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-11-07 01:43:15,630 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-11-07 01:43:15,839 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 228 [2019-11-07 01:43:16,055 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 292 [2019-11-07 01:43:16,496 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-07 01:43:16,611 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-07 01:43:16,735 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2019-11-07 01:43:16,940 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 372 [2019-11-07 01:43:17,051 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-07 01:43:17,384 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 372 [2019-11-07 01:43:17,717 WARN L191 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 382 [2019-11-07 01:43:18,183 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 382 [2019-11-07 01:43:18,351 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 172 for LOIs [2019-11-07 01:43:18,632 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 120 [2019-11-07 01:43:18,927 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 125 [2019-11-07 01:43:19,030 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2019-11-07 01:43:19,675 WARN L191 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 140 [2019-11-07 01:43:19,950 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2019-11-07 01:43:20,280 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 140 [2019-11-07 01:43:20,466 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2019-11-07 01:43:21,148 WARN L191 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 141 [2019-11-07 01:43:21,336 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:21,806 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 141 [2019-11-07 01:43:21,993 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:23,080 WARN L191 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 141 [2019-11-07 01:43:23,355 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:24,340 WARN L191 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 141 [2019-11-07 01:43:24,580 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:25,091 WARN L191 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 141 [2019-11-07 01:43:25,280 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:26,030 WARN L191 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 170 [2019-11-07 01:43:26,457 WARN L191 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-11-07 01:43:27,541 WARN L191 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 170 [2019-11-07 01:43:27,977 WARN L191 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-11-07 01:43:29,200 WARN L191 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 170 [2019-11-07 01:43:29,692 WARN L191 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-11-07 01:43:30,673 WARN L191 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 170 [2019-11-07 01:43:31,118 WARN L191 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-11-07 01:43:32,123 WARN L191 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 170 [2019-11-07 01:43:32,691 WARN L191 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-11-07 01:43:33,881 WARN L191 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 170