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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:37,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:42:37,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:42:38,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:42:38,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:38,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:38,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:38,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:38,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:38,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:38,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:38,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:38,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:38,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:38,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:38,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:38,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:38,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:38,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:38,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:38,037 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 01:42:38,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:38,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:38,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:38,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:38,052 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:38,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:38,053 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:38,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:38,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:38,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:38,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:38,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:38,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:38,054 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:38,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:38,054 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:38,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:38,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:38,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:38,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:38,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:38,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:38,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:38,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:38,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:38,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:38,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:38,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:38,057 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 01:42:38,331 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:38,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:38,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:38,349 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:38,350 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:38,350 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-10-15 01:42:38,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72a5a5c16/df68d38865744cafb15b350698206c6e/FLAGdfe76a27d [2019-10-15 01:42:39,013 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:39,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-10-15 01:42:39,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72a5a5c16/df68d38865744cafb15b350698206c6e/FLAGdfe76a27d [2019-10-15 01:42:39,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72a5a5c16/df68d38865744cafb15b350698206c6e [2019-10-15 01:42:39,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:39,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:39,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:39,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:39,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:39,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:39" (1/1) ... [2019-10-15 01:42:39,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145ffc26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39, skipping insertion in model container [2019-10-15 01:42:39,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:39" (1/1) ... [2019-10-15 01:42:39,294 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:39,345 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:39,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:39,940 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:40,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:40,045 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:40,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40 WrapperNode [2019-10-15 01:42:40,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:40,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:40,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:40,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:40,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40" (1/1) ... [2019-10-15 01:42:40,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40" (1/1) ... [2019-10-15 01:42:40,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40" (1/1) ... [2019-10-15 01:42:40,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40" (1/1) ... [2019-10-15 01:42:40,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40" (1/1) ... [2019-10-15 01:42:40,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40" (1/1) ... [2019-10-15 01:42:40,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40" (1/1) ... [2019-10-15 01:42:40,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:40,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:40,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:40,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:40,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40" (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 01:42:40,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:40,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:40,253 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:40,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:40,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:40,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:42,460 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:42,461 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:42,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:42 BoogieIcfgContainer [2019-10-15 01:42:42,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:42,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:42,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:42,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:42,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:39" (1/3) ... [2019-10-15 01:42:42,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50603fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:42, skipping insertion in model container [2019-10-15 01:42:42,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40" (2/3) ... [2019-10-15 01:42:42,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50603fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:42, skipping insertion in model container [2019-10-15 01:42:42,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:42" (3/3) ... [2019-10-15 01:42:42,472 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label45.c [2019-10-15 01:42:42,482 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:42,490 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:42,502 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:42,527 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:42,528 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:42,528 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:42,528 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:42,528 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:42,529 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:42,529 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:42,529 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:42,560 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:42,561 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 01:42:42,563 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash -219486466, now seen corresponding path program 1 times [2019-10-15 01:42:42,579 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:42,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142260183] [2019-10-15 01:42:42,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:42,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:42,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:43,044 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 01:42:43,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142260183] [2019-10-15 01:42:43,046 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:43,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:43,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933601913] [2019-10-15 01:42:43,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:43,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:43,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:43,070 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:43,618 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:43,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:43,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:43,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:43,634 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:43,634 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:43,639 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 01:42:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:42:43,736 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:42:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:43,737 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:42:43,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:42:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:42:43,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:43,743 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 01:42:43,743 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash -702021245, now seen corresponding path program 1 times [2019-10-15 01:42:43,744 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:43,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878569259] [2019-10-15 01:42:43,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:43,920 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 01:42:43,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878569259] [2019-10-15 01:42:43,921 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:43,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:42:43,922 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438434606] [2019-10-15 01:42:43,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:42:43,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:43,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:42:43,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:42:43,925 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 4 states. [2019-10-15 01:42:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:44,823 INFO L93 Difference]: Finished difference Result 681 states and 1261 transitions. [2019-10-15 01:42:44,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:42:44,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-10-15 01:42:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:44,844 INFO L225 Difference]: With dead ends: 681 [2019-10-15 01:42:44,844 INFO L226 Difference]: Without dead ends: 511 [2019-10-15 01:42:44,847 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 01:42:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-10-15 01:42:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2019-10-15 01:42:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-10-15 01:42:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 836 transitions. [2019-10-15 01:42:44,937 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 836 transitions. Word has length 94 [2019-10-15 01:42:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:44,938 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 836 transitions. [2019-10-15 01:42:44,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:42:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 836 transitions. [2019-10-15 01:42:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:42:44,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:44,948 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:44,948 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1307424922, now seen corresponding path program 1 times [2019-10-15 01:42:44,949 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:44,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378050500] [2019-10-15 01:42:44,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:44,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:44,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:45,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378050500] [2019-10-15 01:42:45,038 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:45,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:45,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656133233] [2019-10-15 01:42:45,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:45,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:45,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:45,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:45,040 INFO L87 Difference]: Start difference. First operand 511 states and 836 transitions. Second operand 6 states. [2019-10-15 01:42:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:45,671 INFO L93 Difference]: Finished difference Result 1237 states and 2158 transitions. [2019-10-15 01:42:45,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:42:45,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:42:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:45,681 INFO L225 Difference]: With dead ends: 1237 [2019-10-15 01:42:45,681 INFO L226 Difference]: Without dead ends: 731 [2019-10-15 01:42:45,685 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:42:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2019-10-15 01:42:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 703. [2019-10-15 01:42:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2019-10-15 01:42:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1139 transitions. [2019-10-15 01:42:45,734 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1139 transitions. Word has length 108 [2019-10-15 01:42:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:45,735 INFO L462 AbstractCegarLoop]: Abstraction has 703 states and 1139 transitions. [2019-10-15 01:42:45,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1139 transitions. [2019-10-15 01:42:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 01:42:45,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:45,742 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-15 01:42:45,743 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash -650311126, now seen corresponding path program 1 times [2019-10-15 01:42:45,743 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:45,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839232040] [2019-10-15 01:42:45,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:45,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:45,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:45,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839232040] [2019-10-15 01:42:45,957 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:45,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:45,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195507588] [2019-10-15 01:42:45,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:45,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:45,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:45,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:45,959 INFO L87 Difference]: Start difference. First operand 703 states and 1139 transitions. Second operand 6 states. [2019-10-15 01:42:46,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:46,659 INFO L93 Difference]: Finished difference Result 1725 states and 2992 transitions. [2019-10-15 01:42:46,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:42:46,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-10-15 01:42:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:46,668 INFO L225 Difference]: With dead ends: 1725 [2019-10-15 01:42:46,668 INFO L226 Difference]: Without dead ends: 1027 [2019-10-15 01:42:46,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:42:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2019-10-15 01:42:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 997. [2019-10-15 01:42:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2019-10-15 01:42:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1484 transitions. [2019-10-15 01:42:46,722 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1484 transitions. Word has length 110 [2019-10-15 01:42:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:46,723 INFO L462 AbstractCegarLoop]: Abstraction has 997 states and 1484 transitions. [2019-10-15 01:42:46,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1484 transitions. [2019-10-15 01:42:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 01:42:46,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:46,728 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:46,729 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:46,729 INFO L82 PathProgramCache]: Analyzing trace with hash -72689956, now seen corresponding path program 1 times [2019-10-15 01:42:46,730 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:46,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076654742] [2019-10-15 01:42:46,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:46,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:46,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:46,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076654742] [2019-10-15 01:42:46,903 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:46,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:46,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570629247] [2019-10-15 01:42:46,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:46,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:46,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:46,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:46,905 INFO L87 Difference]: Start difference. First operand 997 states and 1484 transitions. Second operand 6 states. [2019-10-15 01:42:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:47,688 INFO L93 Difference]: Finished difference Result 2743 states and 4368 transitions. [2019-10-15 01:42:47,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:42:47,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-10-15 01:42:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:47,704 INFO L225 Difference]: With dead ends: 2743 [2019-10-15 01:42:47,704 INFO L226 Difference]: Without dead ends: 1751 [2019-10-15 01:42:47,709 INFO L600 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 [2019-10-15 01:42:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2019-10-15 01:42:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1711. [2019-10-15 01:42:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1711 states. [2019-10-15 01:42:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2392 transitions. [2019-10-15 01:42:47,783 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2392 transitions. Word has length 117 [2019-10-15 01:42:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:47,784 INFO L462 AbstractCegarLoop]: Abstraction has 1711 states and 2392 transitions. [2019-10-15 01:42:47,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2392 transitions. [2019-10-15 01:42:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:42:47,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:47,790 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:47,791 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:47,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash 5219257, now seen corresponding path program 1 times [2019-10-15 01:42:47,791 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:47,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123644177] [2019-10-15 01:42:47,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:47,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:47,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:48,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123644177] [2019-10-15 01:42:48,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501881177] [2019-10-15 01:42:48,002 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 01:42:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:48,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:48,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:42:48,295 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:42:48,365 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:42:48,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-15 01:42:48,366 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811749365] [2019-10-15 01:42:48,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:48,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:48,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:42:48,367 INFO L87 Difference]: Start difference. First operand 1711 states and 2392 transitions. Second operand 3 states. [2019-10-15 01:42:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:48,803 INFO L93 Difference]: Finished difference Result 4009 states and 5605 transitions. [2019-10-15 01:42:48,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:48,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-15 01:42:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:48,814 INFO L225 Difference]: With dead ends: 4009 [2019-10-15 01:42:48,814 INFO L226 Difference]: Without dead ends: 1521 [2019-10-15 01:42:48,821 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:42:48,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2019-10-15 01:42:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1521. [2019-10-15 01:42:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1521 states. [2019-10-15 01:42:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2002 transitions. [2019-10-15 01:42:48,875 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2002 transitions. Word has length 121 [2019-10-15 01:42:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:48,876 INFO L462 AbstractCegarLoop]: Abstraction has 1521 states and 2002 transitions. [2019-10-15 01:42:48,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:48,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2002 transitions. [2019-10-15 01:42:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:42:48,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:48,881 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:49,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:49,095 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2015126325, now seen corresponding path program 1 times [2019-10-15 01:42:49,096 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:49,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754885111] [2019-10-15 01:42:49,096 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:49,096 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:49,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:42:49,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754885111] [2019-10-15 01:42:49,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637890580] [2019-10-15 01:42:49,208 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 01:42:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:49,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:42:49,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:42:49,400 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:42:49,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [483762440] [2019-10-15 01:42:49,508 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:49,508 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:49,516 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:49,525 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:49,526 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:49,820 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:51,795 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs [2019-10-15 01:42:54,856 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:54,873 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:55,173 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2019-10-15 01:42:55,414 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:55,721 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:56,307 WARN L191 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 98 [2019-10-15 01:42:56,622 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:56,897 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2019-10-15 01:42:57,126 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2019-10-15 01:42:57,395 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2019-10-15 01:42:57,627 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2019-10-15 01:42:57,987 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2019-10-15 01:42:58,320 WARN L191 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2019-10-15 01:43:01,700 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:01,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 20 [2019-10-15 01:43:01,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242840096] [2019-10-15 01:43:01,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-15 01:43:01,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:01,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-15 01:43:01,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-10-15 01:43:01,704 INFO L87 Difference]: Start difference. First operand 1521 states and 2002 transitions. Second operand 20 states. [2019-10-15 01:43:02,014 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:02,529 WARN L191 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 105 [2019-10-15 01:43:02,933 WARN L191 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2019-10-15 01:43:03,489 WARN L191 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 96 [2019-10-15 01:43:03,847 WARN L191 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:43:04,234 WARN L191 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:43:04,601 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2019-10-15 01:43:04,782 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-10-15 01:43:05,207 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 80 [2019-10-15 01:43:05,554 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 76 [2019-10-15 01:43:05,855 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 01:43:06,076 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-10-15 01:43:06,987 WARN L191 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 78 [2019-10-15 01:43:07,328 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2019-10-15 01:43:07,545 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 01:43:07,712 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-10-15 01:43:10,009 WARN L191 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 99 [2019-10-15 01:43:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:12,192 INFO L93 Difference]: Finished difference Result 4408 states and 5630 transitions. [2019-10-15 01:43:12,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:43:12,193 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 158 [2019-10-15 01:43:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:12,208 INFO L225 Difference]: With dead ends: 4408 [2019-10-15 01:43:12,210 INFO L226 Difference]: Without dead ends: 2792 [2019-10-15 01:43:12,219 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 363 SyntacticMatches, 115 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:43:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-10-15 01:43:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2776. [2019-10-15 01:43:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2019-10-15 01:43:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 3292 transitions. [2019-10-15 01:43:12,344 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 3292 transitions. Word has length 158 [2019-10-15 01:43:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:12,344 INFO L462 AbstractCegarLoop]: Abstraction has 2776 states and 3292 transitions. [2019-10-15 01:43:12,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-15 01:43:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 3292 transitions. [2019-10-15 01:43:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-15 01:43:12,358 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:12,359 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:12,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:12,565 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:12,566 INFO L82 PathProgramCache]: Analyzing trace with hash -520173476, now seen corresponding path program 1 times [2019-10-15 01:43:12,566 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:12,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071404712] [2019-10-15 01:43:12,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:12,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:12,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-15 01:43:12,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071404712] [2019-10-15 01:43:12,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384368645] [2019-10-15 01:43:12,742 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 01:43:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:12,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:12,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:43:12,932 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 18 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-15 01:43:13,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [768114801] [2019-10-15 01:43:13,032 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:13,032 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:13,033 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:13,034 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:13,035 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:13,147 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs