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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:29,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:42:29,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:42:29,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:42:29,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:29,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:29,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:29,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:29,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:29,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:29,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:29,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:29,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:29,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:29,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:29,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:29,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:29,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:29,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:29,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:29,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:42:29,941 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:29,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:29,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:29,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:29,943 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:29,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:29,943 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:29,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:29,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:29,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:29,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:29,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:29,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:29,945 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:29,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:29,945 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:29,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:29,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:29,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:29,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:29,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:29,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:29,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:29,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:29,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:29,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:29,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:29,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:29,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:42:30,230 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:30,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:30,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:30,248 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:30,248 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:30,249 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label39.c [2019-10-15 01:42:30,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/340700341/f78c4acf32bd4603a3badc4fa2123120/FLAGf9f1d1115 [2019-10-15 01:42:30,914 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:30,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label39.c [2019-10-15 01:42:30,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/340700341/f78c4acf32bd4603a3badc4fa2123120/FLAGf9f1d1115 [2019-10-15 01:42:31,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/340700341/f78c4acf32bd4603a3badc4fa2123120 [2019-10-15 01:42:31,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:31,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:31,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:31,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:31,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:31,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:31" (1/1) ... [2019-10-15 01:42:31,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11574e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31, skipping insertion in model container [2019-10-15 01:42:31,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:31" (1/1) ... [2019-10-15 01:42:31,237 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:31,291 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:31,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:31,811 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:31,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:31,941 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:31,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31 WrapperNode [2019-10-15 01:42:31,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:31,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:31,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:31,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:31,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31" (1/1) ... [2019-10-15 01:42:31,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31" (1/1) ... [2019-10-15 01:42:31,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31" (1/1) ... [2019-10-15 01:42:31,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31" (1/1) ... [2019-10-15 01:42:32,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31" (1/1) ... [2019-10-15 01:42:32,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31" (1/1) ... [2019-10-15 01:42:32,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31" (1/1) ... [2019-10-15 01:42:32,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:32,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:32,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:32,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:32,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:34,107 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:34,108 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:34,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:34 BoogieIcfgContainer [2019-10-15 01:42:34,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:34,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:34,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:34,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:34,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:31" (1/3) ... [2019-10-15 01:42:34,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2f18a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:34, skipping insertion in model container [2019-10-15 01:42:34,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:31" (2/3) ... [2019-10-15 01:42:34,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2f18a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:34, skipping insertion in model container [2019-10-15 01:42:34,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:34" (3/3) ... [2019-10-15 01:42:34,118 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label39.c [2019-10-15 01:42:34,128 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:34,136 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:34,148 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:34,175 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:34,175 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:34,176 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:34,176 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:34,176 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:34,176 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:34,176 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:34,177 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:34,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:34,211 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:34,213 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:34,220 INFO L82 PathProgramCache]: Analyzing trace with hash -219362761, now seen corresponding path program 1 times [2019-10-15 01:42:34,231 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:34,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180685404] [2019-10-15 01:42:34,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:34,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:34,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:34,696 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 01:42:34,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180685404] [2019-10-15 01:42:34,699 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:34,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:34,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260463137] [2019-10-15 01:42:34,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:34,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:34,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:34,727 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:35,284 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:35,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:35,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:35,301 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:35,302 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:35,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:42:35,419 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:42:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:35,421 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:42:35,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:42:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:42:35,438 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:35,438 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:35,439 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:35,440 INFO L82 PathProgramCache]: Analyzing trace with hash -701897540, now seen corresponding path program 1 times [2019-10-15 01:42:35,440 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:35,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910588346] [2019-10-15 01:42:35,441 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:35,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:35,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:35,690 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 01:42:35,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910588346] [2019-10-15 01:42:35,691 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:35,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:42:35,691 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274302169] [2019-10-15 01:42:35,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:42:35,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:35,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:42:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:42:35,694 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 4 states. [2019-10-15 01:42:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:36,447 INFO L93 Difference]: Finished difference Result 681 states and 1261 transitions. [2019-10-15 01:42:36,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:42:36,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-10-15 01:42:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:36,455 INFO L225 Difference]: With dead ends: 681 [2019-10-15 01:42:36,456 INFO L226 Difference]: Without dead ends: 511 [2019-10-15 01:42:36,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 01:42:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-10-15 01:42:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2019-10-15 01:42:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-10-15 01:42:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 846 transitions. [2019-10-15 01:42:36,504 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 846 transitions. Word has length 94 [2019-10-15 01:42:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:36,505 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 846 transitions. [2019-10-15 01:42:36,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:42:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 846 transitions. [2019-10-15 01:42:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-15 01:42:36,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:36,510 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:36,510 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1247418632, now seen corresponding path program 1 times [2019-10-15 01:42:36,511 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:36,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729483678] [2019-10-15 01:42:36,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:36,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:36,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:36,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729483678] [2019-10-15 01:42:36,679 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:36,679 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:36,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404001315] [2019-10-15 01:42:36,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:36,681 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:36,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:36,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:36,683 INFO L87 Difference]: Start difference. First operand 511 states and 846 transitions. Second operand 3 states. [2019-10-15 01:42:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:37,173 INFO L93 Difference]: Finished difference Result 1521 states and 2619 transitions. [2019-10-15 01:42:37,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:37,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-15 01:42:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:37,182 INFO L225 Difference]: With dead ends: 1521 [2019-10-15 01:42:37,182 INFO L226 Difference]: Without dead ends: 1015 [2019-10-15 01:42:37,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:37,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2019-10-15 01:42:37,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 847. [2019-10-15 01:42:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2019-10-15 01:42:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1318 transitions. [2019-10-15 01:42:37,247 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1318 transitions. Word has length 100 [2019-10-15 01:42:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:37,248 INFO L462 AbstractCegarLoop]: Abstraction has 847 states and 1318 transitions. [2019-10-15 01:42:37,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1318 transitions. [2019-10-15 01:42:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:42:37,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:37,252 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2019-10-15 01:42:37,252 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1241899973, now seen corresponding path program 1 times [2019-10-15 01:42:37,253 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:37,253 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369383480] [2019-10-15 01:42:37,253 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:37,254 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:37,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:42:37,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369383480] [2019-10-15 01:42:37,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433669486] [2019-10-15 01:42:37,330 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 01:42:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:37,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:37,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:37,587 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:37,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940309219] [2019-10-15 01:42:37,711 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:37,711 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:37,717 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:37,725 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:37,726 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:38,048 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:40,229 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:48,826 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2019-10-15 01:42:48,951 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 14144 conjuctions. This might take some time... [2019-10-15 01:42:49,783 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-10-15 01:42:50,011 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 19640 conjuctions. This might take some time... [2019-10-15 01:42:50,949 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-10-15 01:42:51,106 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 19640 conjuctions. This might take some time... [2019-10-15 01:42:52,273 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:52,295 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:52,590 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2019-10-15 01:42:52,817 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:53,096 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:53,405 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:53,718 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 82 [2019-10-15 01:42:54,013 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:54,274 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:54,535 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:54,841 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2019-10-15 01:42:55,569 WARN L191 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 90 [2019-10-15 01:42:55,832 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:42:58,810 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:42:58,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 12] total 22 [2019-10-15 01:42:58,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224224761] [2019-10-15 01:42:58,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:42:58,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:42:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:42:58,813 INFO L87 Difference]: Start difference. First operand 847 states and 1318 transitions. Second operand 22 states. [2019-10-15 01:42:59,156 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:59,542 WARN L191 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:59,932 WARN L191 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2019-10-15 01:43:00,326 WARN L191 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 96 [2019-10-15 01:43:00,663 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:43:01,009 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:43:01,219 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-10-15 01:43:01,448 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-10-15 01:43:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:04,327 INFO L93 Difference]: Finished difference Result 1923 states and 3203 transitions. [2019-10-15 01:43:04,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:43:04,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2019-10-15 01:43:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:04,341 INFO L225 Difference]: With dead ends: 1923 [2019-10-15 01:43:04,341 INFO L226 Difference]: Without dead ends: 1081 [2019-10-15 01:43:04,345 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 231 SyntacticMatches, 74 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:43:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2019-10-15 01:43:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 956. [2019-10-15 01:43:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2019-10-15 01:43:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1392 transitions. [2019-10-15 01:43:04,419 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1392 transitions. Word has length 104 [2019-10-15 01:43:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:04,419 INFO L462 AbstractCegarLoop]: Abstraction has 956 states and 1392 transitions. [2019-10-15 01:43:04,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:43:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1392 transitions. [2019-10-15 01:43:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:43:04,424 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:04,424 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:04,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:04,629 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:04,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1792226958, now seen corresponding path program 1 times [2019-10-15 01:43:04,630 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:04,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124497935] [2019-10-15 01:43:04,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:04,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:04,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:04,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124497935] [2019-10-15 01:43:04,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84345301] [2019-10-15 01:43:04,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:04,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:04,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:43:04,922 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:43:04,960 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:43:04,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 01:43:04,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458122355] [2019-10-15 01:43:04,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:04,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:04,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:43:04,962 INFO L87 Difference]: Start difference. First operand 956 states and 1392 transitions. Second operand 3 states. [2019-10-15 01:43:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:05,359 INFO L93 Difference]: Finished difference Result 2072 states and 3140 transitions. [2019-10-15 01:43:05,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:05,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-15 01:43:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:05,367 INFO L225 Difference]: With dead ends: 2072 [2019-10-15 01:43:05,367 INFO L226 Difference]: Without dead ends: 950 [2019-10-15 01:43:05,370 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:43:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2019-10-15 01:43:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 950. [2019-10-15 01:43:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2019-10-15 01:43:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1320 transitions. [2019-10-15 01:43:05,409 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1320 transitions. Word has length 121 [2019-10-15 01:43:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:05,410 INFO L462 AbstractCegarLoop]: Abstraction has 950 states and 1320 transitions. [2019-10-15 01:43:05,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1320 transitions. [2019-10-15 01:43:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:43:05,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:05,415 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:05,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:05,621 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash 93782989, now seen corresponding path program 1 times [2019-10-15 01:43:05,621 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:05,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179055713] [2019-10-15 01:43:05,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:05,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:05,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:05,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179055713] [2019-10-15 01:43:05,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840089818] [2019-10-15 01:43:05,741 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 [2019-10-15 01:43:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:05,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:43:05,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:05,929 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:05,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081349808] [2019-10-15 01:43:05,999 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:05,999 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:06,000 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:06,000 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:06,001 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:06,145 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:07,121 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs [2019-10-15 01:43:08,582 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:43:08,639 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 31