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_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:57,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:42:57,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:42:57,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:42:57,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:57,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:57,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:57,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:57,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:57,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:57,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:57,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:57,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:57,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:57,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:57,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:57,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:57,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:57,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:57,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:57,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:42:57,240 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:57,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:57,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:57,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:57,242 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:57,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:57,242 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:57,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:57,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:57,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:57,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:57,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:57,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:57,243 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:57,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:57,244 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:57,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:57,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:57,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:57,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:57,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:57,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:57,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:57,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:57,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:57,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:57,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:57,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:57,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:42:57,540 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:57,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:57,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:57,560 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:57,561 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:57,561 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label52.c [2019-10-15 01:42:57,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c868a6985/ea8d983a66ab42df957d74dc75ee8778/FLAGbc3226758 [2019-10-15 01:42:58,203 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:58,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label52.c [2019-10-15 01:42:58,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c868a6985/ea8d983a66ab42df957d74dc75ee8778/FLAGbc3226758 [2019-10-15 01:42:58,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c868a6985/ea8d983a66ab42df957d74dc75ee8778 [2019-10-15 01:42:58,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:58,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:58,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:58,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:58,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:58,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:58" (1/1) ... [2019-10-15 01:42:58,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6509102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:58, skipping insertion in model container [2019-10-15 01:42:58,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:58" (1/1) ... [2019-10-15 01:42:58,573 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:58,626 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:59,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:59,130 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:59,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:59,285 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:59,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:59 WrapperNode [2019-10-15 01:42:59,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:59,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:59,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:59,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:59,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:59" (1/1) ... [2019-10-15 01:42:59,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:59" (1/1) ... [2019-10-15 01:42:59,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:59" (1/1) ... [2019-10-15 01:42:59,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:59" (1/1) ... [2019-10-15 01:42:59,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:59" (1/1) ... [2019-10-15 01:42:59,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:59" (1/1) ... [2019-10-15 01:42:59,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:59" (1/1) ... [2019-10-15 01:42:59,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:59,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:59,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:59,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:59,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 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 [2019-10-15 01:42:59,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:59,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:59,451 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:59,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:01,416 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:01,416 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:01,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:01 BoogieIcfgContainer [2019-10-15 01:43:01,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:01,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:01,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:01,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:01,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:58" (1/3) ... [2019-10-15 01:43:01,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2715da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:01, skipping insertion in model container [2019-10-15 01:43:01,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:59" (2/3) ... [2019-10-15 01:43:01,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2715da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:01, skipping insertion in model container [2019-10-15 01:43:01,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:01" (3/3) ... [2019-10-15 01:43:01,427 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label52.c [2019-10-15 01:43:01,437 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:01,445 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:01,457 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:01,487 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:01,488 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:01,488 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:01,488 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:01,488 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:01,488 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:01,489 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:01,489 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:43:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:43:01,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:01,548 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:01,550 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:01,556 INFO L82 PathProgramCache]: Analyzing trace with hash -219364553, now seen corresponding path program 1 times [2019-10-15 01:43:01,566 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:01,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441053672] [2019-10-15 01:43:01,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:01,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:01,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:02,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441053672] [2019-10-15 01:43:02,029 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:02,029 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:43:02,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607792598] [2019-10-15 01:43:02,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:43:02,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:02,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:43:02,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:43:02,055 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 4 states. [2019-10-15 01:43:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:02,909 INFO L93 Difference]: Finished difference Result 361 states and 678 transitions. [2019-10-15 01:43:02,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:43:02,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2019-10-15 01:43:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:02,928 INFO L225 Difference]: With dead ends: 361 [2019-10-15 01:43:02,928 INFO L226 Difference]: Without dead ends: 259 [2019-10-15 01:43:02,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:43:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-10-15 01:43:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2019-10-15 01:43:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-10-15 01:43:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 475 transitions. [2019-10-15 01:43:03,002 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 475 transitions. Word has length 86 [2019-10-15 01:43:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:03,003 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 475 transitions. [2019-10-15 01:43:03,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:43:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 475 transitions. [2019-10-15 01:43:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:43:03,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:03,010 INFO L380 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] [2019-10-15 01:43:03,010 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1220270232, now seen corresponding path program 1 times [2019-10-15 01:43:03,011 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:03,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020437350] [2019-10-15 01:43:03,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:03,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:03,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:03,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020437350] [2019-10-15 01:43:03,150 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:03,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:03,151 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298311802] [2019-10-15 01:43:03,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:03,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:03,153 INFO L87 Difference]: Start difference. First operand 259 states and 475 transitions. Second operand 6 states. [2019-10-15 01:43:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:03,747 INFO L93 Difference]: Finished difference Result 701 states and 1310 transitions. [2019-10-15 01:43:03,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:43:03,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-15 01:43:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:03,753 INFO L225 Difference]: With dead ends: 701 [2019-10-15 01:43:03,753 INFO L226 Difference]: Without dead ends: 447 [2019-10-15 01:43:03,756 INFO L600 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 [2019-10-15 01:43:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-15 01:43:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-10-15 01:43:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-15 01:43:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 786 transitions. [2019-10-15 01:43:03,809 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 786 transitions. Word has length 104 [2019-10-15 01:43:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:03,811 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 786 transitions. [2019-10-15 01:43:03,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 786 transitions. [2019-10-15 01:43:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:43:03,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:03,823 INFO L380 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] [2019-10-15 01:43:03,824 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:03,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1842865376, now seen corresponding path program 1 times [2019-10-15 01:43:03,824 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:03,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879832946] [2019-10-15 01:43:03,825 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:03,825 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:03,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:03,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879832946] [2019-10-15 01:43:03,994 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:03,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:03,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691300402] [2019-10-15 01:43:03,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:03,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:03,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:03,996 INFO L87 Difference]: Start difference. First operand 441 states and 786 transitions. Second operand 3 states. [2019-10-15 01:43:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:04,450 INFO L93 Difference]: Finished difference Result 1133 states and 2051 transitions. [2019-10-15 01:43:04,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:04,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-10-15 01:43:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:04,457 INFO L225 Difference]: With dead ends: 1133 [2019-10-15 01:43:04,457 INFO L226 Difference]: Without dead ends: 697 [2019-10-15 01:43:04,461 INFO L600 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 [2019-10-15 01:43:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-10-15 01:43:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2019-10-15 01:43:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 01:43:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1206 transitions. [2019-10-15 01:43:04,494 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1206 transitions. Word has length 105 [2019-10-15 01:43:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:04,495 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1206 transitions. [2019-10-15 01:43:04,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1206 transitions. [2019-10-15 01:43:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-15 01:43:04,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:04,500 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:04,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:04,500 INFO L82 PathProgramCache]: Analyzing trace with hash 880772869, now seen corresponding path program 1 times [2019-10-15 01:43:04,501 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:04,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989965052] [2019-10-15 01:43:04,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:04,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:04,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:04,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989965052] [2019-10-15 01:43:04,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020852905] [2019-10-15 01:43:04,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:04,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:04,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:04,896 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:05,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378538915] [2019-10-15 01:43:05,040 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:05,040 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:05,047 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:05,056 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:05,056 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:05,395 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:06,044 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 139 [2019-10-15 01:43:07,601 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:43:16,626 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2019-10-15 01:43:16,739 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 9928 conjuctions. This might take some time... [2019-10-15 01:43:17,434 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2019-10-15 01:43:17,655 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 23064 conjuctions. This might take some time... [2019-10-15 01:43:19,397 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2019-10-15 01:43:19,623 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 23064 conjuctions. This might take some time... [2019-10-15 01:43:21,425 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:21,439 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:21,689 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:22,009 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:22,565 WARN L191 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 98 [2019-10-15 01:43:22,911 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 81 [2019-10-15 01:43:23,223 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2019-10-15 01:43:23,488 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:43:23,771 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:43:24,029 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:43:24,928 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2019-10-15 01:43:28,385 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:43:28,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 5, 5] total 21 [2019-10-15 01:43:28,386 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977973273] [2019-10-15 01:43:28,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 01:43:28,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:28,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 01:43:28,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:43:28,389 INFO L87 Difference]: Start difference. First operand 697 states and 1206 transitions. Second operand 12 states. [2019-10-15 01:43:28,708 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:29,142 WARN L191 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 94 [2019-10-15 01:43:29,664 WARN L191 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 99 [2019-10-15 01:43:30,218 WARN L191 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 96 [2019-10-15 01:43:30,575 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:43:30,934 WARN L191 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:43:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:33,389 INFO L93 Difference]: Finished difference Result 1572 states and 2704 transitions. [2019-10-15 01:43:33,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:43:33,393 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 159 [2019-10-15 01:43:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:33,399 INFO L225 Difference]: With dead ends: 1572 [2019-10-15 01:43:33,399 INFO L226 Difference]: Without dead ends: 880 [2019-10-15 01:43:33,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 336 SyntacticMatches, 127 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:43:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-10-15 01:43:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 874. [2019-10-15 01:43:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2019-10-15 01:43:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1403 transitions. [2019-10-15 01:43:33,456 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1403 transitions. Word has length 159 [2019-10-15 01:43:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:33,457 INFO L462 AbstractCegarLoop]: Abstraction has 874 states and 1403 transitions. [2019-10-15 01:43:33,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 01:43:33,457 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1403 transitions. [2019-10-15 01:43:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-15 01:43:33,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:33,462 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:33,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:33,671 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:33,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1334614618, now seen corresponding path program 1 times [2019-10-15 01:43:33,672 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:33,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864839144] [2019-10-15 01:43:33,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:33,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:33,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 84 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:43:33,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864839144] [2019-10-15 01:43:33,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26936381] [2019-10-15 01:43:33,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:33,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:33,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:43:34,006 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:43:34,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331843725] [2019-10-15 01:43:34,081 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:34,081 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:34,082 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:34,082 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:34,083 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:34,206 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:35,717 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs