/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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:41:13,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:41:13,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:41:13,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:41:13,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:41:13,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:41:13,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:41:13,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:41:13,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:41:13,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:41:13,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:41:13,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:41:13,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:41:13,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:41:13,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:41:13,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:41:13,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:41:13,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:41:13,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:41:13,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:41:13,936 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 01:41:13,970 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:41:13,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:41:13,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:41:13,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:41:13,972 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:41:13,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:41:13,972 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:41:13,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:41:13,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:41:13,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:41:13,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:41:13,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:41:13,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:41:13,973 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:41:13,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:41:13,977 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:41:13,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:41:13,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:41:13,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:41:13,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:41:13,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:41:13,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:41:13,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:41:13,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:41:13,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:41:13,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:41:13,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:41:13,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:41:13,979 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 01:41:14,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:41:14,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:41:14,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:41:14,282 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:41:14,283 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:41:14,283 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label59.c [2019-11-07 01:41:14,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf14dcd36/90a83d0e9f8e4636a0dc6153438f6e9a/FLAG178f6d6c6 [2019-11-07 01:41:14,918 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:41:14,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label59.c [2019-11-07 01:41:14,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf14dcd36/90a83d0e9f8e4636a0dc6153438f6e9a/FLAG178f6d6c6 [2019-11-07 01:41:15,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf14dcd36/90a83d0e9f8e4636a0dc6153438f6e9a [2019-11-07 01:41:15,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:41:15,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:41:15,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:15,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:41:15,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:41:15,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:15" (1/1) ... [2019-11-07 01:41:15,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30256132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15, skipping insertion in model container [2019-11-07 01:41:15,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:15" (1/1) ... [2019-11-07 01:41:15,212 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:41:15,269 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:41:15,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:15,722 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:41:15,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:15,948 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:41:15,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15 WrapperNode [2019-11-07 01:41:15,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:15,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:41:15,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:41:15,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:41:15,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15" (1/1) ... [2019-11-07 01:41:15,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15" (1/1) ... [2019-11-07 01:41:15,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15" (1/1) ... [2019-11-07 01:41:15,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15" (1/1) ... [2019-11-07 01:41:16,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15" (1/1) ... [2019-11-07 01:41:16,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15" (1/1) ... [2019-11-07 01:41:16,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15" (1/1) ... [2019-11-07 01:41:16,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:41:16,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:41:16,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:41:16,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:41:16,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15" (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 01:41:16,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:41:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:41:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:41:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:41:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:41:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:41:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:41:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:41:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:41:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:41:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:41:18,173 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:41:18,173 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:41:18,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:18 BoogieIcfgContainer [2019-11-07 01:41:18,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:41:18,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:41:18,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:41:18,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:41:18,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:41:15" (1/3) ... [2019-11-07 01:41:18,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0d249d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:18, skipping insertion in model container [2019-11-07 01:41:18,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15" (2/3) ... [2019-11-07 01:41:18,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0d249d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:18, skipping insertion in model container [2019-11-07 01:41:18,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:18" (3/3) ... [2019-11-07 01:41:18,196 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label59.c [2019-11-07 01:41:18,205 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:41:18,212 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:41:18,224 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:41:18,250 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:41:18,250 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:41:18,251 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:41:18,251 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:41:18,252 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:41:18,252 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:41:18,252 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:41:18,253 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:41:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:41:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:41:18,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:18,285 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 01:41:18,287 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash -219460263, now seen corresponding path program 1 times [2019-11-07 01:41:18,303 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:18,303 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23116516] [2019-11-07 01:41:18,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:18,723 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 01:41:18,724 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23116516] [2019-11-07 01:41:18,725 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:18,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:18,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342231401] [2019-11-07 01:41:18,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:18,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:18,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:18,753 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:41:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:19,325 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:41:19,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:19,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:41:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:19,353 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:41:19,354 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:41:19,362 INFO L630 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 [2019-11-07 01:41:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:41:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:41:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:41:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-11-07 01:41:19,469 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-11-07 01:41:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:19,471 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-11-07 01:41:19,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-11-07 01:41:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:41:19,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:19,476 INFO L410 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] [2019-11-07 01:41:19,476 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:19,477 INFO L82 PathProgramCache]: Analyzing trace with hash -701995042, now seen corresponding path program 1 times [2019-11-07 01:41:19,477 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:19,478 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781239028] [2019-11-07 01:41:19,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:19,651 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781239028] [2019-11-07 01:41:19,651 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:19,651 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:19,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638656459] [2019-11-07 01:41:19,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:19,654 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:19,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:19,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:19,654 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-11-07 01:41:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:20,042 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-11-07 01:41:20,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:20,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:41:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:20,047 INFO L225 Difference]: With dead ends: 513 [2019-11-07 01:41:20,047 INFO L226 Difference]: Without dead ends: 343 [2019-11-07 01:41:20,049 INFO L630 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 [2019-11-07 01:41:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-11-07 01:41:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 259. [2019-11-07 01:41:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-11-07 01:41:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 415 transitions. [2019-11-07 01:41:20,073 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 415 transitions. Word has length 94 [2019-11-07 01:41:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:20,074 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 415 transitions. [2019-11-07 01:41:20,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 415 transitions. [2019-11-07 01:41:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-07 01:41:20,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:20,078 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:20,078 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:20,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:20,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2133153300, now seen corresponding path program 1 times [2019-11-07 01:41:20,079 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:20,079 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053776802] [2019-11-07 01:41:20,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:20,233 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053776802] [2019-11-07 01:41:20,234 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476885723] [2019-11-07 01:41:20,234 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 01:41:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:20,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:41:20,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:20,463 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:20,526 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:41:20,529 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-07 01:41:20,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866497916] [2019-11-07 01:41:20,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:41:20,532 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:20,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:41:20,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:41:20,534 INFO L87 Difference]: Start difference. First operand 259 states and 415 transitions. Second operand 4 states. [2019-11-07 01:41:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:21,361 INFO L93 Difference]: Finished difference Result 1017 states and 1697 transitions. [2019-11-07 01:41:21,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:41:21,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-11-07 01:41:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:21,368 INFO L225 Difference]: With dead ends: 1017 [2019-11-07 01:41:21,368 INFO L226 Difference]: Without dead ends: 679 [2019-11-07 01:41:21,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:41:21,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-11-07 01:41:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 595. [2019-11-07 01:41:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-11-07 01:41:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 929 transitions. [2019-11-07 01:41:21,422 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 929 transitions. Word has length 99 [2019-11-07 01:41:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:21,423 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 929 transitions. [2019-11-07 01:41:21,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:41:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 929 transitions. [2019-11-07 01:41:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-07 01:41:21,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:21,437 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:21,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:21,638 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:21,639 INFO L82 PathProgramCache]: Analyzing trace with hash -217629803, now seen corresponding path program 1 times [2019-11-07 01:41:21,640 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:21,640 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338783711] [2019-11-07 01:41:21,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:21,782 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338783711] [2019-11-07 01:41:21,782 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:21,782 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:41:21,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461577729] [2019-11-07 01:41:21,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:41:21,784 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:21,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:41:21,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:41:21,785 INFO L87 Difference]: Start difference. First operand 595 states and 929 transitions. Second operand 6 states. [2019-11-07 01:41:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:22,474 INFO L93 Difference]: Finished difference Result 1747 states and 2935 transitions. [2019-11-07 01:41:22,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:22,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2019-11-07 01:41:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:22,485 INFO L225 Difference]: With dead ends: 1747 [2019-11-07 01:41:22,485 INFO L226 Difference]: Without dead ends: 1157 [2019-11-07 01:41:22,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:41:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2019-11-07 01:41:22,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1129. [2019-11-07 01:41:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1129 states. [2019-11-07 01:41:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1758 transitions. [2019-11-07 01:41:22,557 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1758 transitions. Word has length 118 [2019-11-07 01:41:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:22,558 INFO L462 AbstractCegarLoop]: Abstraction has 1129 states and 1758 transitions. [2019-11-07 01:41:22,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:41:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1758 transitions. [2019-11-07 01:41:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 01:41:22,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:22,563 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:22,564 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:22,564 INFO L82 PathProgramCache]: Analyzing trace with hash -423602746, now seen corresponding path program 1 times [2019-11-07 01:41:22,564 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:22,565 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976135581] [2019-11-07 01:41:22,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:22,689 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976135581] [2019-11-07 01:41:22,690 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:22,690 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:41:22,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670973342] [2019-11-07 01:41:22,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:41:22,691 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:22,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:41:22,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:41:22,692 INFO L87 Difference]: Start difference. First operand 1129 states and 1758 transitions. Second operand 6 states. [2019-11-07 01:41:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:23,369 INFO L93 Difference]: Finished difference Result 2301 states and 3684 transitions. [2019-11-07 01:41:23,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:41:23,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2019-11-07 01:41:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:23,381 INFO L225 Difference]: With dead ends: 2301 [2019-11-07 01:41:23,381 INFO L226 Difference]: Without dead ends: 1177 [2019-11-07 01:41:23,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:41:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2019-11-07 01:41:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1153. [2019-11-07 01:41:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2019-11-07 01:41:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1719 transitions. [2019-11-07 01:41:23,434 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1719 transitions. Word has length 148 [2019-11-07 01:41:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:23,435 INFO L462 AbstractCegarLoop]: Abstraction has 1153 states and 1719 transitions. [2019-11-07 01:41:23,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:41:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1719 transitions. [2019-11-07 01:41:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 01:41:23,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:23,440 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:23,440 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:23,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1279191556, now seen corresponding path program 1 times [2019-11-07 01:41:23,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:23,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992306832] [2019-11-07 01:41:23,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:23,583 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992306832] [2019-11-07 01:41:23,583 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:23,583 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:41:23,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346555596] [2019-11-07 01:41:23,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:41:23,584 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:23,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:41:23,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:41:23,585 INFO L87 Difference]: Start difference. First operand 1153 states and 1719 transitions. Second operand 6 states. [2019-11-07 01:41:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:24,319 INFO L93 Difference]: Finished difference Result 2355 states and 3705 transitions. [2019-11-07 01:41:24,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:41:24,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-11-07 01:41:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:24,328 INFO L225 Difference]: With dead ends: 2355 [2019-11-07 01:41:24,328 INFO L226 Difference]: Without dead ends: 1115 [2019-11-07 01:41:24,332 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 01:41:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2019-11-07 01:41:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1071. [2019-11-07 01:41:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2019-11-07 01:41:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1494 transitions. [2019-11-07 01:41:24,372 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1494 transitions. Word has length 157 [2019-11-07 01:41:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:24,373 INFO L462 AbstractCegarLoop]: Abstraction has 1071 states and 1494 transitions. [2019-11-07 01:41:24,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:41:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1494 transitions. [2019-11-07 01:41:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 01:41:24,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:24,377 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:24,378 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:24,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:24,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1688231143, now seen corresponding path program 1 times [2019-11-07 01:41:24,378 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:24,379 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29867767] [2019-11-07 01:41:24,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:24,479 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29867767] [2019-11-07 01:41:24,479 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852471583] [2019-11-07 01:41:24,480 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 01:41:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:24,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:41:24,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:24,612 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:24,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1514240564] [2019-11-07 01:41:24,720 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:41:24,720 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:41:24,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:41:24,739 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:41:24,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:41:24,957 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:41:26,228 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-11-07 01:41:31,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:41:31,766 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:41:32,172 WARN L191 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2019-11-07 01:41:32,539 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:41:32,827 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:41:33,159 WARN L191 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2019-11-07 01:41:33,442 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-11-07 01:41:33,679 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-11-07 01:41:33,918 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-11-07 01:41:34,247 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2019-11-07 01:41:34,604 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2019-11-07 01:41:35,590 WARN L191 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 99 [2019-11-07 01:41:36,210 WARN L191 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 76 [2019-11-07 01:41:41,700 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:41:41,700 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 13] total 20 [2019-11-07 01:41:41,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859462517] [2019-11-07 01:41:41,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-07 01:41:41,703 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-07 01:41:41,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2019-11-07 01:41:41,704 INFO L87 Difference]: Start difference. First operand 1071 states and 1494 transitions. Second operand 20 states. [2019-11-07 01:41:41,856 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:41:42,249 WARN L191 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 92 [2019-11-07 01:41:42,633 WARN L191 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2019-11-07 01:41:43,041 WARN L191 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 95 [2019-11-07 01:41:43,380 WARN L191 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2019-11-07 01:41:43,725 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 93 [2019-11-07 01:41:44,002 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2019-11-07 01:41:44,230 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-11-07 01:41:44,694 WARN L191 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2019-11-07 01:41:45,234 WARN L191 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 85 [2019-11-07 01:41:45,479 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2019-11-07 01:41:45,738 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2019-11-07 01:41:46,063 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2019-11-07 01:41:46,364 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2019-11-07 01:41:46,698 WARN L191 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2019-11-07 01:41:47,565 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2019-11-07 01:41:47,865 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-11-07 01:41:48,929 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2019-11-07 01:41:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:51,660 INFO L93 Difference]: Finished difference Result 2904 states and 4029 transitions. [2019-11-07 01:41:51,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-07 01:41:51,661 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 161 [2019-11-07 01:41:51,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:51,670 INFO L225 Difference]: With dead ends: 2904 [2019-11-07 01:41:51,670 INFO L226 Difference]: Without dead ends: 1838 [2019-11-07 01:41:51,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 348 SyntacticMatches, 131 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=337, Invalid=1469, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 01:41:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2019-11-07 01:41:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1740. [2019-11-07 01:41:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1740 states. [2019-11-07 01:41:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2311 transitions. [2019-11-07 01:41:51,729 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2311 transitions. Word has length 161 [2019-11-07 01:41:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:51,729 INFO L462 AbstractCegarLoop]: Abstraction has 1740 states and 2311 transitions. [2019-11-07 01:41:51,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-07 01:41:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2311 transitions. [2019-11-07 01:41:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 01:41:51,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:51,734 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-07 01:41:51,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:51,938 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:51,939 INFO L82 PathProgramCache]: Analyzing trace with hash -971564255, now seen corresponding path program 1 times [2019-11-07 01:41:51,939 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:51,939 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127809360] [2019-11-07 01:41:51,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 89 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 01:41:52,113 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127809360] [2019-11-07 01:41:52,113 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546019341] [2019-11-07 01:41:52,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:52,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:41:52,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:41:52,341 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 106 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 01:41:52,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328700292] [2019-11-07 01:41:52,426 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:41:52,426 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:41:52,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:41:52,427 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:41:52,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:41:52,476 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs