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_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:34,198 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:41:34,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:34,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:34,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:34,279 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 01:41:34,312 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:34,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:34,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:34,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:34,317 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:34,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:34,317 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:34,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:34,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:34,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:34,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:34,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:34,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:34,322 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:34,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:34,322 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:34,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:34,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:34,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:34,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:34,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:34,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:34,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:34,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:34,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:34,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:34,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:34,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:34,325 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 01:41:34,589 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:34,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:34,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:34,607 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:34,608 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:34,608 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-10-15 01:41:34,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f1940cd5/cf5b4eff9c874aae9188e2464453ff6e/FLAGe6c6a60cd [2019-10-15 01:41:35,270 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:35,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-10-15 01:41:35,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f1940cd5/cf5b4eff9c874aae9188e2464453ff6e/FLAGe6c6a60cd [2019-10-15 01:41:35,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f1940cd5/cf5b4eff9c874aae9188e2464453ff6e [2019-10-15 01:41:35,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:35,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:35,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:35,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:35,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:35,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:35" (1/1) ... [2019-10-15 01:41:35,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb457ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:35, skipping insertion in model container [2019-10-15 01:41:35,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:35" (1/1) ... [2019-10-15 01:41:35,553 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:35,619 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:36,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:36,176 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:36,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:36,331 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:36,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36 WrapperNode [2019-10-15 01:41:36,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:36,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:36,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:36,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:36,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (1/1) ... [2019-10-15 01:41:36,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:36,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:36,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:36,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:36,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (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 01:41:36,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:36,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:36,564 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:36,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:36,564 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:36,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:38,633 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:38,634 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:38,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:38 BoogieIcfgContainer [2019-10-15 01:41:38,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:38,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:38,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:38,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:38,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:35" (1/3) ... [2019-10-15 01:41:38,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b4e9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:38, skipping insertion in model container [2019-10-15 01:41:38,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:36" (2/3) ... [2019-10-15 01:41:38,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b4e9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:38, skipping insertion in model container [2019-10-15 01:41:38,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:38" (3/3) ... [2019-10-15 01:41:38,645 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label13.c [2019-10-15 01:41:38,656 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:38,668 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:38,682 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:38,718 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:38,718 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:38,718 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:38,719 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:38,719 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:38,719 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:38,719 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:38,720 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:38,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:38,763 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 01:41:38,766 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:38,773 INFO L82 PathProgramCache]: Analyzing trace with hash -219369161, now seen corresponding path program 1 times [2019-10-15 01:41:38,782 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:38,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146996387] [2019-10-15 01:41:38,782 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:38,783 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:38,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:39,192 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 01:41:39,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146996387] [2019-10-15 01:41:39,194 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:39,195 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:39,195 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46293187] [2019-10-15 01:41:39,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:39,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:39,224 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:39,873 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:39,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:39,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:39,902 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:39,902 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:39,909 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 01:41:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:39,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-15 01:41:40,003 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-15 01:41:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:40,004 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-15 01:41:40,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-15 01:41:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 01:41:40,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:40,011 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:40,011 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:40,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1874064498, now seen corresponding path program 1 times [2019-10-15 01:41:40,012 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:40,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317451139] [2019-10-15 01:41:40,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:40,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:40,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:40,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317451139] [2019-10-15 01:41:40,140 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:40,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:40,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374564496] [2019-10-15 01:41:40,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:40,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:40,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:40,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:40,144 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-15 01:41:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:40,524 INFO L93 Difference]: Finished difference Result 351 states and 663 transitions. [2019-10-15 01:41:40,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:41:40,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-15 01:41:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:40,528 INFO L225 Difference]: With dead ends: 351 [2019-10-15 01:41:40,528 INFO L226 Difference]: Without dead ends: 181 [2019-10-15 01:41:40,530 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:41:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-15 01:41:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2019-10-15 01:41:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-15 01:41:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 299 transitions. [2019-10-15 01:41:40,547 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 299 transitions. Word has length 101 [2019-10-15 01:41:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:40,548 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 299 transitions. [2019-10-15 01:41:40,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 299 transitions. [2019-10-15 01:41:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:41:40,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:40,551 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 01:41:40,551 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1307307617, now seen corresponding path program 1 times [2019-10-15 01:41:40,552 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:40,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785629902] [2019-10-15 01:41:40,552 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:40,552 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:40,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:40,653 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 01:41:40,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785629902] [2019-10-15 01:41:40,654 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:40,654 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:40,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118451022] [2019-10-15 01:41:40,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:40,656 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:40,656 INFO L87 Difference]: Start difference. First operand 177 states and 299 transitions. Second operand 6 states. [2019-10-15 01:41:41,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:41,279 INFO L93 Difference]: Finished difference Result 453 states and 784 transitions. [2019-10-15 01:41:41,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:41:41,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:41:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:41,286 INFO L225 Difference]: With dead ends: 453 [2019-10-15 01:41:41,286 INFO L226 Difference]: Without dead ends: 281 [2019-10-15 01:41:41,288 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 01:41:41,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-10-15 01:41:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 267. [2019-10-15 01:41:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-10-15 01:41:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 433 transitions. [2019-10-15 01:41:41,332 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 433 transitions. Word has length 108 [2019-10-15 01:41:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:41,332 INFO L462 AbstractCegarLoop]: Abstraction has 267 states and 433 transitions. [2019-10-15 01:41:41,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 433 transitions. [2019-10-15 01:41:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-15 01:41:41,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:41,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:41,339 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:41,340 INFO L82 PathProgramCache]: Analyzing trace with hash -852396249, now seen corresponding path program 1 times [2019-10-15 01:41:41,340 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:41,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703178368] [2019-10-15 01:41:41,340 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:41,340 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:41,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:41,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703178368] [2019-10-15 01:41:41,511 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:41,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:41,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671558732] [2019-10-15 01:41:41,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:41,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:41,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:41,513 INFO L87 Difference]: Start difference. First operand 267 states and 433 transitions. Second operand 3 states. [2019-10-15 01:41:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:41,946 INFO L93 Difference]: Finished difference Result 703 states and 1156 transitions. [2019-10-15 01:41:41,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:41,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-15 01:41:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:41,950 INFO L225 Difference]: With dead ends: 703 [2019-10-15 01:41:41,950 INFO L226 Difference]: Without dead ends: 441 [2019-10-15 01:41:41,952 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 01:41:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2019-10-15 01:41:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2019-10-15 01:41:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-15 01:41:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 643 transitions. [2019-10-15 01:41:41,976 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 643 transitions. Word has length 112 [2019-10-15 01:41:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:41,976 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 643 transitions. [2019-10-15 01:41:41,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 643 transitions. [2019-10-15 01:41:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:41:41,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:41,980 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 01:41:41,980 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:41,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:41,981 INFO L82 PathProgramCache]: Analyzing trace with hash 5336562, now seen corresponding path program 1 times [2019-10-15 01:41:41,981 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:41,981 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691430633] [2019-10-15 01:41:41,981 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:41,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:41,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:42,178 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 01:41:42,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691430633] [2019-10-15 01:41:42,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274853164] [2019-10-15 01:41:42,179 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 01:41:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:42,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:42,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:42,390 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 01:41:42,391 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:42,462 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 01:41:42,463 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:41:42,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-15 01:41:42,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043867526] [2019-10-15 01:41:42,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:42,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:42,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:42,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:41:42,467 INFO L87 Difference]: Start difference. First operand 441 states and 643 transitions. Second operand 3 states. [2019-10-15 01:41:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:42,891 INFO L93 Difference]: Finished difference Result 1217 states and 1814 transitions. [2019-10-15 01:41:42,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:42,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-15 01:41:42,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:42,896 INFO L225 Difference]: With dead ends: 1217 [2019-10-15 01:41:42,896 INFO L226 Difference]: Without dead ends: 609 [2019-10-15 01:41:42,898 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 01:41:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-10-15 01:41:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2019-10-15 01:41:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-10-15 01:41:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 760 transitions. [2019-10-15 01:41:42,927 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 760 transitions. Word has length 121 [2019-10-15 01:41:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:42,928 INFO L462 AbstractCegarLoop]: Abstraction has 609 states and 760 transitions. [2019-10-15 01:41:42,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 760 transitions. [2019-10-15 01:41:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:41:42,935 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:42,935 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:43,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:43,137 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:43,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1090347318, now seen corresponding path program 1 times [2019-10-15 01:41:43,138 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:43,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061066457] [2019-10-15 01:41:43,139 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:43,139 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:43,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:41:43,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061066457] [2019-10-15 01:41:43,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863468288] [2019-10-15 01:41:43,259 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 01:41:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:43,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:43,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:41:43,428 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:41:43,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401964205] [2019-10-15 01:41:43,586 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:43,586 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:43,595 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:43,606 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:43,607 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:43,910 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:45,667 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 82 for LOIs [2019-10-15 01:41:47,871 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-15 01:41:47,880 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-15 01:41:47,899 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-15 01:41:47,957 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:41:47,979 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:41:48,279 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2019-10-15 01:41:48,565 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:41:48,856 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:41:49,118 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2019-10-15 01:41:49,558 WARN L191 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 73 [2019-10-15 01:41:49,810 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2019-10-15 01:41:50,055 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2019-10-15 01:41:50,297 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2019-10-15 01:41:50,509 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2019-10-15 01:41:50,867 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2019-10-15 01:41:51,103 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:41:51,413 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:41:54,862 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:41:54,863 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 13] total 25 [2019-10-15 01:41:54,863 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190031640] [2019-10-15 01:41:54,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:41:54,865 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:54,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:41:54,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:41:54,866 INFO L87 Difference]: Start difference. First operand 609 states and 760 transitions. Second operand 25 states. [2019-10-15 01:41:55,214 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:41:55,586 WARN L191 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 93 [2019-10-15 01:41:55,986 WARN L191 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 99 [2019-10-15 01:41:56,401 WARN L191 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 96 [2019-10-15 01:41:56,784 WARN L191 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:41:57,169 WARN L191 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2019-10-15 01:41:57,500 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2019-10-15 01:41:57,747 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2019-10-15 01:41:57,968 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2019-10-15 01:41:58,268 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 01:41:58,426 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 01:41:58,990 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-10-15 01:41:59,259 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2019-10-15 01:41:59,483 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2019-10-15 01:41:59,696 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-15 01:41:59,855 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 01:42:00,130 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2019-10-15 01:42:00,508 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2019-10-15 01:42:00,782 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2019-10-15 01:42:01,015 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2019-10-15 01:42:01,254 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2019-10-15 01:42:01,490 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2019-10-15 01:42:01,834 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2019-10-15 01:42:02,060 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2019-10-15 01:42:02,211 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 01:42:02,459 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2019-10-15 01:42:02,632 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-10-15 01:42:02,791 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-10-15 01:42:03,036 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-10-15 01:42:03,645 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2019-10-15 01:42:04,098 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 97 [2019-10-15 01:42:04,565 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2019-10-15 01:42:04,963 WARN L191 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2019-10-15 01:42:05,446 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2019-10-15 01:42:05,720 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2019-10-15 01:42:06,084 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2019-10-15 01:42:06,369 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2019-10-15 01:42:06,630 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2019-10-15 01:42:06,914 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 01:42:07,150 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2019-10-15 01:42:07,544 WARN L191 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 100 [2019-10-15 01:42:07,706 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-10-15 01:42:08,094 WARN L191 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 97 [2019-10-15 01:42:08,971 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2019-10-15 01:42:09,390 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2019-10-15 01:42:09,630 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-10-15 01:42:09,859 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2019-10-15 01:42:10,130 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2019-10-15 01:42:10,432 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2019-10-15 01:42:10,699 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2019-10-15 01:42:10,860 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 01:42:11,041 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 01:42:11,255 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2019-10-15 01:42:11,528 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2019-10-15 01:42:11,780 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-10-15 01:42:11,995 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2019-10-15 01:42:12,172 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-15 01:42:12,564 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-10-15 01:42:12,708 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-10-15 01:42:13,026 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-10-15 01:42:13,590 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2019-10-15 01:42:13,856 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2019-10-15 01:42:14,367 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2019-10-15 01:42:14,611 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2019-10-15 01:42:14,875 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82