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_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:36,946 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:42:36,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:36,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:36,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:36,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:36,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:36,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:36,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:37,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:37,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:37,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:37,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:37,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:37,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:37,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:37,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:37,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:37,028 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 01:42:37,043 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:37,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:37,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:37,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:37,045 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:37,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:37,045 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:37,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:37,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:37,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:37,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:37,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:37,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:37,047 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:37,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:37,047 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:37,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:37,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:37,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:37,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:37,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:37,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:37,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:37,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:37,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:37,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:37,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:37,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:37,050 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 01:42:37,341 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:37,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:37,357 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:37,359 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:37,359 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:37,360 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label44.c [2019-10-15 01:42:37,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a5a064a/3b3e262dfec2480fb4d29100e60af789/FLAG6fe3ff423 [2019-10-15 01:42:37,931 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:37,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label44.c [2019-10-15 01:42:37,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a5a064a/3b3e262dfec2480fb4d29100e60af789/FLAG6fe3ff423 [2019-10-15 01:42:38,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a5a064a/3b3e262dfec2480fb4d29100e60af789 [2019-10-15 01:42:38,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:38,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:38,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:38,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:38,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:38,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7f8ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38, skipping insertion in model container [2019-10-15 01:42:38,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,273 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:38,328 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:38,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:38,895 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:39,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:39,023 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:39,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39 WrapperNode [2019-10-15 01:42:39,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:39,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:39,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:39,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:39,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39" (1/1) ... [2019-10-15 01:42:39,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39" (1/1) ... [2019-10-15 01:42:39,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39" (1/1) ... [2019-10-15 01:42:39,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39" (1/1) ... [2019-10-15 01:42:39,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39" (1/1) ... [2019-10-15 01:42:39,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39" (1/1) ... [2019-10-15 01:42:39,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39" (1/1) ... [2019-10-15 01:42:39,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:39,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:39,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:39,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:39,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39" (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 01:42:39,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:39,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:39,197 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:39,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:41,148 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:41,151 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:41,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:41 BoogieIcfgContainer [2019-10-15 01:42:41,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:41,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:41,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:41,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:41,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:38" (1/3) ... [2019-10-15 01:42:41,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660908f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:41, skipping insertion in model container [2019-10-15 01:42:41,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:39" (2/3) ... [2019-10-15 01:42:41,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660908f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:41, skipping insertion in model container [2019-10-15 01:42:41,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:41" (3/3) ... [2019-10-15 01:42:41,168 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label44.c [2019-10-15 01:42:41,180 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:41,188 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:41,200 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:41,236 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:41,236 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:41,238 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:41,238 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:41,238 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:41,238 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:41,239 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:41,239 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:41,286 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:41,287 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 01:42:41,290 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:41,296 INFO L82 PathProgramCache]: Analyzing trace with hash -219368649, now seen corresponding path program 1 times [2019-10-15 01:42:41,308 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:41,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075210446] [2019-10-15 01:42:41,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:41,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:41,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:41,806 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 01:42:41,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075210446] [2019-10-15 01:42:41,808 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:41,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:41,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239495867] [2019-10-15 01:42:41,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:41,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:41,831 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:42,505 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:42,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:42,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:42,521 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:42,521 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:42,525 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 01:42:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:42:42,592 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:42:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:42,593 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:42:42,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:42:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:42:42,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:42,598 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 01:42:42,599 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:42,599 INFO L82 PathProgramCache]: Analyzing trace with hash -701903428, now seen corresponding path program 1 times [2019-10-15 01:42:42,600 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:42,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790328871] [2019-10-15 01:42:42,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:42,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:42,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:42,738 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 01:42:42,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790328871] [2019-10-15 01:42:42,739 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:42,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:42,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991862589] [2019-10-15 01:42:42,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:42,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:42,743 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:42:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:43,126 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:42:43,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:43,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:42:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:43,133 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:42:43,133 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:42:43,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:42:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-15 01:42:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:42:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-10-15 01:42:43,163 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-10-15 01:42:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:43,164 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-10-15 01:42:43,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-10-15 01:42:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-15 01:42:43,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:43,169 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 01:42:43,169 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:43,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1247412744, now seen corresponding path program 1 times [2019-10-15 01:42:43,170 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:43,170 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649224536] [2019-10-15 01:42:43,170 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,170 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:43,324 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 01:42:43,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649224536] [2019-10-15 01:42:43,325 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:43,325 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:43,325 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697694075] [2019-10-15 01:42:43,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:43,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:43,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:43,328 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 3 states. [2019-10-15 01:42:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:43,770 INFO L93 Difference]: Finished difference Result 1017 states and 1776 transitions. [2019-10-15 01:42:43,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:43,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-15 01:42:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:43,777 INFO L225 Difference]: With dead ends: 1017 [2019-10-15 01:42:43,777 INFO L226 Difference]: Without dead ends: 679 [2019-10-15 01:42:43,780 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 01:42:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-15 01:42:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 511. [2019-10-15 01:42:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-10-15 01:42:43,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 811 transitions. [2019-10-15 01:42:43,821 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 811 transitions. Word has length 100 [2019-10-15 01:42:43,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:43,822 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 811 transitions. [2019-10-15 01:42:43,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 811 transitions. [2019-10-15 01:42:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:42:43,827 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:43,828 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:42:43,828 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:43,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1843556116, now seen corresponding path program 1 times [2019-10-15 01:42:43,829 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:43,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554583740] [2019-10-15 01:42:43,829 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,829 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:42:43,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554583740] [2019-10-15 01:42:43,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084894190] [2019-10-15 01:42:43,963 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 01:42:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:44,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:44,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:44,145 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:44,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211158108] [2019-10-15 01:42:44,331 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:44,332 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:44,338 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:44,346 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:44,347 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:44,668 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:46,555 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 88 for LOIs [2019-10-15 01:42:55,699 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:42:55,865 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:42:56,000 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:42:56,245 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:56,260 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:56,544 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2019-10-15 01:42:56,775 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:57,058 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:57,550 WARN L191 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 95 [2019-10-15 01:42:57,870 WARN L191 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2019-10-15 01:42:58,166 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2019-10-15 01:42:58,423 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2019-10-15 01:42:58,706 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-10-15 01:42:59,252 WARN L191 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:42:59,649 WARN L191 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2019-10-15 01:42:59,918 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2019-10-15 01:43:03,898 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:03,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 22 [2019-10-15 01:43:03,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32145717] [2019-10-15 01:43:03,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:43:03,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:03,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:43:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:43:03,902 INFO L87 Difference]: Start difference. First operand 511 states and 811 transitions. Second operand 22 states. [2019-10-15 01:43:04,220 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:04,533 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 87 [2019-10-15 01:43:04,977 WARN L191 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 93 [2019-10-15 01:43:05,435 WARN L191 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 90 [2019-10-15 01:43:05,771 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:43:06,112 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:43:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:09,074 INFO L93 Difference]: Finished difference Result 1235 states and 2085 transitions. [2019-10-15 01:43:09,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:43:09,077 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 123 [2019-10-15 01:43:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:09,092 INFO L225 Difference]: With dead ends: 1235 [2019-10-15 01:43:09,092 INFO L226 Difference]: Without dead ends: 729 [2019-10-15 01:43:09,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 269 SyntacticMatches, 94 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:43:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2019-10-15 01:43:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 700. [2019-10-15 01:43:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-10-15 01:43:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1006 transitions. [2019-10-15 01:43:09,145 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1006 transitions. Word has length 123 [2019-10-15 01:43:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:09,146 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1006 transitions. [2019-10-15 01:43:09,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:43:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1006 transitions. [2019-10-15 01:43:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:43:09,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:09,152 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, 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] [2019-10-15 01:43:09,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:09,356 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1847410011, now seen corresponding path program 1 times [2019-10-15 01:43:09,358 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:09,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787448075] [2019-10-15 01:43:09,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:09,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:09,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:09,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787448075] [2019-10-15 01:43:09,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58415473] [2019-10-15 01:43:09,542 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 01:43:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:09,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:43:09,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:09,714 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:09,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831371100] [2019-10-15 01:43:09,793 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:09,793 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:09,799 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:09,799 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:09,799 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:09,916 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:11,255 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs [2019-10-15 01:43:12,662 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 01:43:12,674 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 01:43:12,693 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 01:43:12,742 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:12,756 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:12,983 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2019-10-15 01:43:13,183 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:13,450 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:13,693 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-10-15 01:43:13,966 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:43:14,209 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2019-10-15 01:43:14,433 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2019-10-15 01:43:14,674 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2019-10-15 01:43:14,887 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2019-10-15 01:43:15,422 WARN L191 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 76