/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:38:30,959 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:38:31,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:38:31,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:38:31,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:38:31,029 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 01:38:31,052 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:38:31,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:38:31,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:38:31,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:38:31,054 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:38:31,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:38:31,055 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:38:31,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:38:31,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:38:31,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:38:31,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:38:31,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:38:31,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:38:31,056 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:38:31,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:38:31,057 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:38:31,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:38:31,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:38:31,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:38:31,057 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:38:31,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:38:31,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:38:31,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:38:31,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:38:31,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:38:31,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:38:31,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:38:31,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:38:31,059 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 01:38:31,395 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:38:31,411 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:38:31,415 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:38:31,417 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:38:31,418 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:38:31,419 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-11-07 01:38:31,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a4309d4/3a4d693412af46678afa257493188b09/FLAGa7e452b58 [2019-11-07 01:38:32,110 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:38:32,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-11-07 01:38:32,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a4309d4/3a4d693412af46678afa257493188b09/FLAGa7e452b58 [2019-11-07 01:38:32,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a4309d4/3a4d693412af46678afa257493188b09 [2019-11-07 01:38:32,427 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:38:32,432 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:38:32,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:38:32,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:38:32,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:38:32,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:32" (1/1) ... [2019-11-07 01:38:32,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab07c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:32, skipping insertion in model container [2019-11-07 01:38:32,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:32" (1/1) ... [2019-11-07 01:38:32,478 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:38:32,565 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:38:33,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:38:33,084 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:38:33,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:38:33,227 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:38:33,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33 WrapperNode [2019-11-07 01:38:33,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:38:33,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:38:33,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:38:33,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:38:33,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33" (1/1) ... [2019-11-07 01:38:33,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33" (1/1) ... [2019-11-07 01:38:33,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33" (1/1) ... [2019-11-07 01:38:33,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33" (1/1) ... [2019-11-07 01:38:33,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33" (1/1) ... [2019-11-07 01:38:33,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33" (1/1) ... [2019-11-07 01:38:33,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33" (1/1) ... [2019-11-07 01:38:33,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:38:33,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:38:33,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:38:33,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:38:33,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33" (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 01:38:33,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:38:33,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:38:33,399 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:38:33,399 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:38:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:38:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:38:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:38:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:38:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:38:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:38:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:38:35,568 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:38:35,572 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:38:35,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:35 BoogieIcfgContainer [2019-11-07 01:38:35,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:38:35,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:38:35,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:38:35,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:38:35,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:38:32" (1/3) ... [2019-11-07 01:38:35,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d9ec13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:35, skipping insertion in model container [2019-11-07 01:38:35,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:33" (2/3) ... [2019-11-07 01:38:35,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d9ec13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:35, skipping insertion in model container [2019-11-07 01:38:35,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:35" (3/3) ... [2019-11-07 01:38:35,593 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label22.c [2019-11-07 01:38:35,604 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:38:35,616 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:38:35,628 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:38:35,662 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:38:35,663 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:38:35,663 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:38:35,663 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:38:35,663 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:38:35,663 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:38:35,663 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:38:35,665 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:38:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:38:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:38:35,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:35,699 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:35,701 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:35,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash -219366345, now seen corresponding path program 1 times [2019-11-07 01:38:35,718 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:35,718 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649901655] [2019-11-07 01:38:35,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:36,274 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 01:38:36,275 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649901655] [2019-11-07 01:38:36,276 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:36,276 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:38:36,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061909378] [2019-11-07 01:38:36,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:38:36,284 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:36,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:38:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:36,303 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:38:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:36,916 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:38:36,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:38:36,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:38:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:36,935 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:38:36,935 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:38:36,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:38:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:38:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:38:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2019-11-07 01:38:37,013 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2019-11-07 01:38:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:37,015 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2019-11-07 01:38:37,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:38:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2019-11-07 01:38:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-07 01:38:37,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:37,021 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:37,021 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:37,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:37,022 INFO L82 PathProgramCache]: Analyzing trace with hash 656210794, now seen corresponding path program 1 times [2019-11-07 01:38:37,022 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:37,022 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892155791] [2019-11-07 01:38:37,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:37,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892155791] [2019-11-07 01:38:37,192 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:37,192 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:38:37,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015580505] [2019-11-07 01:38:37,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:38:37,195 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:37,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:38:37,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:38:37,196 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand 6 states. [2019-11-07 01:38:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:37,891 INFO L93 Difference]: Finished difference Result 531 states and 984 transitions. [2019-11-07 01:38:37,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:38:37,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-11-07 01:38:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:37,900 INFO L225 Difference]: With dead ends: 531 [2019-11-07 01:38:37,901 INFO L226 Difference]: Without dead ends: 361 [2019-11-07 01:38:37,906 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:38:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-11-07 01:38:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 355. [2019-11-07 01:38:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-11-07 01:38:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 632 transitions. [2019-11-07 01:38:37,964 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 632 transitions. Word has length 104 [2019-11-07 01:38:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:37,964 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 632 transitions. [2019-11-07 01:38:37,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:38:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 632 transitions. [2019-11-07 01:38:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-07 01:38:37,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:37,973 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:37,974 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:37,974 INFO L82 PathProgramCache]: Analyzing trace with hash 633621345, now seen corresponding path program 1 times [2019-11-07 01:38:37,975 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:37,975 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053776802] [2019-11-07 01:38:37,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:38,103 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053776802] [2019-11-07 01:38:38,103 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:38,103 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:38:38,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384030551] [2019-11-07 01:38:38,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:38:38,105 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:38:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:38,105 INFO L87 Difference]: Start difference. First operand 355 states and 632 transitions. Second operand 3 states. [2019-11-07 01:38:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:38,592 INFO L93 Difference]: Finished difference Result 963 states and 1743 transitions. [2019-11-07 01:38:38,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:38:38,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-11-07 01:38:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:38,601 INFO L225 Difference]: With dead ends: 963 [2019-11-07 01:38:38,603 INFO L226 Difference]: Without dead ends: 613 [2019-11-07 01:38:38,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2019-11-07 01:38:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2019-11-07 01:38:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2019-11-07 01:38:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 981 transitions. [2019-11-07 01:38:38,676 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 981 transitions. Word has length 105 [2019-11-07 01:38:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:38,677 INFO L462 AbstractCegarLoop]: Abstraction has 613 states and 981 transitions. [2019-11-07 01:38:38,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:38:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 981 transitions. [2019-11-07 01:38:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-07 01:38:38,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:38,683 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:38,683 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:38,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1660923829, now seen corresponding path program 1 times [2019-11-07 01:38:38,684 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:38,684 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411723596] [2019-11-07 01:38:38,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:38,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411723596] [2019-11-07 01:38:38,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093427685] [2019-11-07 01:38:38,819 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 01:38:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:38,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 01:38:38,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:38:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:38:39,085 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:38:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:38:39,266 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:38:39,266 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2019-11-07 01:38:39,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344741923] [2019-11-07 01:38:39,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 01:38:39,268 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:39,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 01:38:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:38:39,269 INFO L87 Difference]: Start difference. First operand 613 states and 981 transitions. Second operand 7 states. [2019-11-07 01:38:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:39,923 INFO L93 Difference]: Finished difference Result 1599 states and 2650 transitions. [2019-11-07 01:38:39,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:38:39,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-11-07 01:38:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:39,931 INFO L225 Difference]: With dead ends: 1599 [2019-11-07 01:38:39,932 INFO L226 Difference]: Without dead ends: 991 [2019-11-07 01:38:39,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:38:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-11-07 01:38:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 891. [2019-11-07 01:38:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-11-07 01:38:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1461 transitions. [2019-11-07 01:38:39,983 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1461 transitions. Word has length 113 [2019-11-07 01:38:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:39,983 INFO L462 AbstractCegarLoop]: Abstraction has 891 states and 1461 transitions. [2019-11-07 01:38:39,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 01:38:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1461 transitions. [2019-11-07 01:38:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 01:38:39,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:39,988 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:40,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:38:40,195 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:40,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:40,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1191499248, now seen corresponding path program 1 times [2019-11-07 01:38:40,197 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:40,197 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658894825] [2019-11-07 01:38:40,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:38:40,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658894825] [2019-11-07 01:38:40,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478287563] [2019-11-07 01:38:40,314 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 01:38:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:40,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:38:40,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:38:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 01:38:40,547 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:38:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:38:40,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716051930] [2019-11-07 01:38:40,687 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:38:40,688 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:38:40,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:38:40,706 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:38:40,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:38:40,856 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:38:41,839 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 85 for LOIs [2019-11-07 01:38:43,228 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-11-07 01:38:43,659 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-11-07 01:38:43,996 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-11-07 01:38:44,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:38:44,910 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:38:45,325 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:38:45,869 WARN L191 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 91 [2019-11-07 01:38:46,599 WARN L191 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 96 [2019-11-07 01:38:46,898 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-11-07 01:38:47,167 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2019-11-07 01:38:47,416 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-11-07 01:38:47,712 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2019-11-07 01:38:48,062 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 74 [2019-11-07 01:38:48,398 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2019-11-07 01:38:48,544 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2019-11-07 01:38:48,865 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2019-11-07 01:38:49,248 WARN L191 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2019-11-07 01:38:49,731 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2019-11-07 01:38:50,032 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2019-11-07 01:38:50,435 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:38:50,851 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-11-07 01:38:51,162 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:38:51,485 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:38:51,832 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:38:52,256 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2019-11-07 01:38:52,589 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2019-11-07 01:38:53,211 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:38:53,597 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:38:53,947 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-11-07 01:38:54,280 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2019-11-07 01:38:54,776 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2019-11-07 01:38:54,963 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:38:54,963 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [6, 5, 5] total 39 [2019-11-07 01:38:54,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337731339] [2019-11-07 01:38:54,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-07 01:38:54,965 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:54,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-07 01:38:54,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2019-11-07 01:38:54,966 INFO L87 Difference]: Start difference. First operand 891 states and 1461 transitions. Second operand 30 states. [2019-11-07 01:38:55,183 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:38:55,515 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 87 [2019-11-07 01:38:56,023 WARN L191 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 98 [2019-11-07 01:38:56,625 WARN L191 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 93 [2019-11-07 01:38:56,978 WARN L191 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2019-11-07 01:38:57,572 WARN L191 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 94 [2019-11-07 01:38:57,975 WARN L191 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 93 [2019-11-07 01:38:58,393 WARN L191 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 72 [2019-11-07 01:38:58,847 WARN L191 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 82 [2019-11-07 01:38:59,503 WARN L191 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2019-11-07 01:38:59,703 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-11-07 01:38:59,972 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-11-07 01:39:00,279 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2019-11-07 01:39:01,108 WARN L191 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 115 [2019-11-07 01:39:01,613 WARN L191 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 113 [2019-11-07 01:39:02,361 WARN L191 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 116 [2019-11-07 01:39:03,153 WARN L191 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 122 [2019-11-07 01:39:03,824 WARN L191 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 123 [2019-11-07 01:39:04,635 WARN L191 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 116 [2019-11-07 01:39:05,209 WARN L191 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 96 [2019-11-07 01:39:05,938 WARN L191 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 115 [2019-11-07 01:39:06,584 WARN L191 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 123 [2019-11-07 01:39:07,543 WARN L191 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 126 [2019-11-07 01:39:08,353 WARN L191 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 127 [2019-11-07 01:39:09,150 WARN L191 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 128 [2019-11-07 01:39:09,860 WARN L191 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 101 [2019-11-07 01:39:10,771 WARN L191 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 136 [2019-11-07 01:39:11,522 WARN L191 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 129 [2019-11-07 01:39:12,377 WARN L191 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116