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_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:34,339 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:41:34,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:34,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:34,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:34,385 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 01:41:34,399 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:34,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:34,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:34,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:34,400 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:34,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:34,401 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:34,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:34,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:34,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:34,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:34,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:34,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:34,402 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:34,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:34,403 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:34,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:34,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:34,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:34,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:34,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:34,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:34,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:34,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:34,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:34,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:34,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:34,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:34,405 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 01:41:34,675 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:34,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:34,696 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:34,698 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:34,698 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:34,699 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2019-10-15 01:41:34,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0041ba3f/cf06cfc162aa4db7a30a6eea8d18ddfe/FLAG2614cf888 [2019-10-15 01:41:35,286 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:35,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2019-10-15 01:41:35,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0041ba3f/cf06cfc162aa4db7a30a6eea8d18ddfe/FLAG2614cf888 [2019-10-15 01:41:35,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0041ba3f/cf06cfc162aa4db7a30a6eea8d18ddfe [2019-10-15 01:41:35,565 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:35,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:35,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:35,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:35,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:35,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:35" (1/1) ... [2019-10-15 01:41:35,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2145fe62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:35, skipping insertion in model container [2019-10-15 01:41:35,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:35" (1/1) ... [2019-10-15 01:41:35,582 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:35,638 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:36,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:36,159 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:36,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:36,327 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:36,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36 WrapperNode [2019-10-15 01:41:36,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:36,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:36,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:36,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:36,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:36,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:36,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:36,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:36,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (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 01:41:36,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:36,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:36,505 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:36,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:36,505 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:36,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:36,509 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:36,509 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:36,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:36,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:38,627 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:38,628 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:38,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:38 BoogieIcfgContainer [2019-10-15 01:41:38,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:38,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:38,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:38,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:38,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:35" (1/3) ... [2019-10-15 01:41:38,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706c7fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:38, skipping insertion in model container [2019-10-15 01:41:38,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (2/3) ... [2019-10-15 01:41:38,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706c7fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:38, skipping insertion in model container [2019-10-15 01:41:38,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:38" (3/3) ... [2019-10-15 01:41:38,638 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label14.c [2019-10-15 01:41:38,647 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:38,655 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:38,666 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:38,691 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:38,691 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:38,691 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:38,692 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:38,692 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:38,692 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:38,692 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:38,693 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:38,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:38,724 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 01:41:38,725 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:38,731 INFO L82 PathProgramCache]: Analyzing trace with hash -219361225, now seen corresponding path program 1 times [2019-10-15 01:41:38,740 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:38,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269432577] [2019-10-15 01:41:38,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:38,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:38,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:39,204 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 01:41:39,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269432577] [2019-10-15 01:41:39,207 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:39,207 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:39,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956892659] [2019-10-15 01:41:39,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:39,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:39,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:39,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:39,238 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:39,788 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:39,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:39,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:39,816 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:39,817 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:39,822 INFO L600 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 [2019-10-15 01:41:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:41:39,918 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:41:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:39,920 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:41:39,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:41:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:41:39,932 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:39,933 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:39,933 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:39,934 INFO L82 PathProgramCache]: Analyzing trace with hash -701896004, now seen corresponding path program 1 times [2019-10-15 01:41:39,935 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:39,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818369105] [2019-10-15 01:41:39,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:39,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:39,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:40,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818369105] [2019-10-15 01:41:40,127 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:40,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:40,127 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917994280] [2019-10-15 01:41:40,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:40,129 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:40,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:40,130 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:41:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:40,479 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:41:40,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:40,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:41:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:40,486 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:41:40,486 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:41:40,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 01:41:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:41:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-15 01:41:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:41:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-10-15 01:41:40,532 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-10-15 01:41:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:40,532 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-10-15 01:41:40,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-10-15 01:41:40,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-15 01:41:40,535 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:40,535 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:40,539 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:40,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:40,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420168, now seen corresponding path program 1 times [2019-10-15 01:41:40,540 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:40,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965101444] [2019-10-15 01:41:40,540 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:40,540 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:40,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:41:40,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965101444] [2019-10-15 01:41:40,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600889998] [2019-10-15 01:41:40,667 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 01:41:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:40,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:40,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:40,881 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:40,927 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:41:40,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 01:41:40,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555985508] [2019-10-15 01:41:40,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:40,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:40,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:40,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:41:40,930 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 3 states. [2019-10-15 01:41:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:41,321 INFO L93 Difference]: Finished difference Result 681 states and 1181 transitions. [2019-10-15 01:41:41,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:41,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-15 01:41:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:41,332 INFO L225 Difference]: With dead ends: 681 [2019-10-15 01:41:41,333 INFO L226 Difference]: Without dead ends: 679 [2019-10-15 01:41:41,335 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:41:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-15 01:41:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 595. [2019-10-15 01:41:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-10-15 01:41:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1031 transitions. [2019-10-15 01:41:41,380 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1031 transitions. Word has length 100 [2019-10-15 01:41:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:41,381 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 1031 transitions. [2019-10-15 01:41:41,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1031 transitions. [2019-10-15 01:41:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:41:41,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:41,387 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:41,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:41,591 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1307299681, now seen corresponding path program 1 times [2019-10-15 01:41:41,592 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:41,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962340957] [2019-10-15 01:41:41,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:41,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:41,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:41,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962340957] [2019-10-15 01:41:41,682 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:41,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:41,682 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638934514] [2019-10-15 01:41:41,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:41,683 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:41,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:41,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:41,684 INFO L87 Difference]: Start difference. First operand 595 states and 1031 transitions. Second operand 6 states. [2019-10-15 01:41:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:42,299 INFO L93 Difference]: Finished difference Result 1223 states and 2179 transitions. [2019-10-15 01:41:42,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:41:42,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:41:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:42,306 INFO L225 Difference]: With dead ends: 1223 [2019-10-15 01:41:42,306 INFO L226 Difference]: Without dead ends: 633 [2019-10-15 01:41:42,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:41:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-15 01:41:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 449. [2019-10-15 01:41:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2019-10-15 01:41:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 737 transitions. [2019-10-15 01:41:42,344 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 737 transitions. Word has length 108 [2019-10-15 01:41:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:42,345 INFO L462 AbstractCegarLoop]: Abstraction has 449 states and 737 transitions. [2019-10-15 01:41:42,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 737 transitions. [2019-10-15 01:41:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:41:42,347 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:42,347 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:42,347 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:42,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1860594020, now seen corresponding path program 1 times [2019-10-15 01:41:42,348 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:42,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742844940] [2019-10-15 01:41:42,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:42,349 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:42,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:42,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742844940] [2019-10-15 01:41:42,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223788056] [2019-10-15 01:41:42,433 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 01:41:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:42,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:42,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:42,584 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:42,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358647966] [2019-10-15 01:41:42,688 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:42,689 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:42,695 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:42,703 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:42,703 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:43,026 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-15 01:41:45,119 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-10-15 01:41:53,541 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:41:53,855 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 33592 conjuctions. This might take some time... [2019-10-15 01:41:55,798 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2019-10-15 01:41:56,379 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 46696 conjuctions. This might take some time... [2019-10-15 01:41:59,131 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2019-10-15 01:41:59,779 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 46696 conjuctions. This might take some time... [2019-10-15 01:42:02,657 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:02,670 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:02,928 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2019-10-15 01:42:03,155 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:03,430 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:03,740 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2019-10-15 01:42:04,042 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 85 [2019-10-15 01:42:04,310 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:04,539 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-10-15 01:42:04,783 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2019-10-15 01:42:05,087 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2019-10-15 01:42:05,950 WARN L191 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 88 [2019-10-15 01:42:06,204 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-10-15 01:42:08,951 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:42:08,952 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 23 [2019-10-15 01:42:08,952 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588891715] [2019-10-15 01:42:08,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:42:08,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:08,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:42:08,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:42:08,955 INFO L87 Difference]: Start difference. First operand 449 states and 737 transitions. Second operand 23 states. [2019-10-15 01:42:09,250 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:09,617 WARN L191 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2019-10-15 01:42:09,998 WARN L191 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2019-10-15 01:42:10,406 WARN L191 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2019-10-15 01:42:10,761 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:11,098 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:12,709 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2019-10-15 01:42:13,060 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74