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/Problem16_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:56:35,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:56:35,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:56:35,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:56:35,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:56:35,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:56:35,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:56:35,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:56:35,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:56:35,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:56:35,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:56:35,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:56:35,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:56:35,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:56:35,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:56:35,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:56:35,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:56:35,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:56:35,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:56:35,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:56:35,104 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 01:56:35,123 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:56:35,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:56:35,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:56:35,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:56:35,125 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:56:35,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:56:35,126 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:56:35,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:56:35,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:56:35,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:56:35,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:56:35,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:56:35,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:56:35,128 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:56:35,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:56:35,129 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:56:35,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:56:35,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:56:35,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:56:35,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:56:35,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:56:35,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:56:35,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:56:35,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:56:35,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:56:35,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:56:35,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:56:35,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:56:35,131 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 01:56:35,411 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:56:35,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:56:35,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:56:35,428 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:56:35,428 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:56:35,429 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label50.c [2019-10-15 01:56:35,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b2a35fe/ca42d29c0f864e62ba4e6b48c3724b8d/FLAG94b703786 [2019-10-15 01:56:36,161 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:56:36,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label50.c [2019-10-15 01:56:36,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b2a35fe/ca42d29c0f864e62ba4e6b48c3724b8d/FLAG94b703786 [2019-10-15 01:56:36,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b2a35fe/ca42d29c0f864e62ba4e6b48c3724b8d [2019-10-15 01:56:36,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:56:36,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:56:36,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:36,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:56:36,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:56:36,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:36" (1/1) ... [2019-10-15 01:56:36,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a972dc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36, skipping insertion in model container [2019-10-15 01:56:36,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:36" (1/1) ... [2019-10-15 01:56:36,338 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:56:36,421 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:56:37,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:37,302 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:56:37,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:37,648 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:56:37,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37 WrapperNode [2019-10-15 01:56:37,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:37,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:56:37,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:56:37,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:56:37,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:56:37,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:56:37,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:56:37,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:56:37,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (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 01:56:37,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:56:37,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:56:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:56:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:56:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:56:37,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:56:37,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:56:37,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:56:37,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:56:37,897 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:56:37,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:56:37,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:56:37,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:56:52,237 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:56:52,237 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:56:52,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:52 BoogieIcfgContainer [2019-10-15 01:56:52,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:56:52,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:56:52,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:56:52,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:56:52,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:56:36" (1/3) ... [2019-10-15 01:56:52,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6154bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:52, skipping insertion in model container [2019-10-15 01:56:52,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (2/3) ... [2019-10-15 01:56:52,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6154bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:52, skipping insertion in model container [2019-10-15 01:56:52,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:52" (3/3) ... [2019-10-15 01:56:52,251 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label50.c [2019-10-15 01:56:52,258 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:56:52,265 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:56:52,277 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:56:52,307 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:56:52,308 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:56:52,308 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:56:52,308 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:56:52,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:56:52,308 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:56:52,308 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:56:52,309 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:56:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:56:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:56:52,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:52,348 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:52,350 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:52,356 INFO L82 PathProgramCache]: Analyzing trace with hash 863564351, now seen corresponding path program 1 times [2019-10-15 01:56:52,365 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:52,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2573298] [2019-10-15 01:56:52,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:52,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:52,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:52,639 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 01:56:52,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2573298] [2019-10-15 01:56:52,640 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:52,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:56:52,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059691172] [2019-10-15 01:56:52,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:56:52,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:52,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:56:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:56:52,665 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:56:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:59,566 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:56:59,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:56:59,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:56:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:59,591 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:56:59,591 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:56:59,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:56:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:56:59,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 690. [2019-10-15 01:56:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-15 01:56:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1275 transitions. [2019-10-15 01:56:59,697 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1275 transitions. Word has length 11 [2019-10-15 01:56:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:59,697 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1275 transitions. [2019-10-15 01:56:59,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:56:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1275 transitions. [2019-10-15 01:56:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:56:59,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:59,700 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:59,700 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:59,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:59,701 INFO L82 PathProgramCache]: Analyzing trace with hash -928568270, now seen corresponding path program 1 times [2019-10-15 01:56:59,701 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:59,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032498993] [2019-10-15 01:56:59,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:59,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:59,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:59,810 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 01:56:59,811 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032498993] [2019-10-15 01:56:59,811 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:59,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:56:59,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336014391] [2019-10-15 01:56:59,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:56:59,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:59,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:56:59,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:56:59,814 INFO L87 Difference]: Start difference. First operand 690 states and 1275 transitions. Second operand 6 states. [2019-10-15 01:57:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:01,996 INFO L93 Difference]: Finished difference Result 2086 states and 3932 transitions. [2019-10-15 01:57:01,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:01,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-15 01:57:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:02,008 INFO L225 Difference]: With dead ends: 2086 [2019-10-15 01:57:02,009 INFO L226 Difference]: Without dead ends: 1401 [2019-10-15 01:57:02,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2019-10-15 01:57:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1372. [2019-10-15 01:57:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-10-15 01:57:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2424 transitions. [2019-10-15 01:57:02,109 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2424 transitions. Word has length 22 [2019-10-15 01:57:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:02,109 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2424 transitions. [2019-10-15 01:57:02,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2424 transitions. [2019-10-15 01:57:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:57:02,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:02,112 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:02,112 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:02,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2144512272, now seen corresponding path program 1 times [2019-10-15 01:57:02,113 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:02,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634884217] [2019-10-15 01:57:02,114 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:02,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:02,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:02,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634884217] [2019-10-15 01:57:02,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70151301] [2019-10-15 01:57:02,274 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 01:57:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:02,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:02,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:57:02,492 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:02,573 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:02,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2019-10-15 01:57:02,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688463653] [2019-10-15 01:57:02,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:02,574 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:02,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:02,575 INFO L87 Difference]: Start difference. First operand 1372 states and 2424 transitions. Second operand 5 states. [2019-10-15 01:57:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:04,519 INFO L93 Difference]: Finished difference Result 3452 states and 6233 transitions. [2019-10-15 01:57:04,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:57:04,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-10-15 01:57:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:04,540 INFO L225 Difference]: With dead ends: 3452 [2019-10-15 01:57:04,540 INFO L226 Difference]: Without dead ends: 2085 [2019-10-15 01:57:04,545 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:57:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2019-10-15 01:57:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2039. [2019-10-15 01:57:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2039 states. [2019-10-15 01:57:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 3115 transitions. [2019-10-15 01:57:04,661 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 3115 transitions. Word has length 38 [2019-10-15 01:57:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:04,662 INFO L462 AbstractCegarLoop]: Abstraction has 2039 states and 3115 transitions. [2019-10-15 01:57:04,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 3115 transitions. [2019-10-15 01:57:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-15 01:57:04,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:04,665 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:57:04,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:04,872 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:04,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1184598050, now seen corresponding path program 1 times [2019-10-15 01:57:04,872 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:04,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627124818] [2019-10-15 01:57:04,873 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:04,873 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:04,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:57:05,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627124818] [2019-10-15 01:57:05,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886545023] [2019-10-15 01:57:05,026 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 01:57:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:05,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:05,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:57:05,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:57:05,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361890488] [2019-10-15 01:57:05,303 INFO L162 IcfgInterpreter]: Started Sifa with 39 locations of interest [2019-10-15 01:57:05,303 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:57:05,311 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:57:05,326 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:57:05,327 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:57:05,490 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2019-10-15 01:57:05,584 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 39 [2019-10-15 01:57:05,832 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 39 [2019-10-15 01:57:05,978 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:57:06,010 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:57:06,766 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs [2019-10-15 01:57:06,860 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-15 01:57:09,612 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 33540 conjuctions. This might take some time... [2019-10-15 01:57:12,559 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-15 01:57:13,702 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 33540 conjuctions. This might take some time...