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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:03,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:41:03,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:41:03,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:41:03,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:03,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:03,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:03,862 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 01:41:03,900 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:03,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:03,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:03,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:03,902 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:03,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:03,902 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:03,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:03,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:03,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:03,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:03,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:03,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:03,904 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:03,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:03,904 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:03,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:03,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:03,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:03,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:03,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:03,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:03,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:03,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:03,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:03,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:03,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:03,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:03,909 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 01:41:04,246 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:04,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:04,273 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:04,275 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:04,275 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:04,276 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2019-10-15 01:41:04,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1900c98ae/ae588b198d8b4adea4b397bd6a3532f8/FLAG63896cc66 [2019-10-15 01:41:04,939 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:04,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2019-10-15 01:41:04,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1900c98ae/ae588b198d8b4adea4b397bd6a3532f8/FLAG63896cc66 [2019-10-15 01:41:05,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1900c98ae/ae588b198d8b4adea4b397bd6a3532f8 [2019-10-15 01:41:05,243 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:05,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:05,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:05,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:05,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:05,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:05" (1/1) ... [2019-10-15 01:41:05,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eb211c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:05, skipping insertion in model container [2019-10-15 01:41:05,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:05" (1/1) ... [2019-10-15 01:41:05,265 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:05,332 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:05,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:05,838 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:06,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:06,022 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:06,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06 WrapperNode [2019-10-15 01:41:06,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:06,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:06,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:06,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:06,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (1/1) ... [2019-10-15 01:41:06,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:06,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:06,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:06,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:06,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (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 01:41:06,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:06,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:06,210 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:06,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:08,210 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:08,210 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:08,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:08 BoogieIcfgContainer [2019-10-15 01:41:08,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:08,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:08,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:08,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:08,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:05" (1/3) ... [2019-10-15 01:41:08,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c28bfe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:08, skipping insertion in model container [2019-10-15 01:41:08,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:06" (2/3) ... [2019-10-15 01:41:08,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c28bfe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:08, skipping insertion in model container [2019-10-15 01:41:08,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:08" (3/3) ... [2019-10-15 01:41:08,224 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label01.c [2019-10-15 01:41:08,237 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:08,247 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:08,259 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:08,294 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:08,295 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:08,295 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:08,295 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:08,295 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:08,295 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:08,296 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:08,296 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:08,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:08,342 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 01:41:08,345 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:08,352 INFO L82 PathProgramCache]: Analyzing trace with hash -219362249, now seen corresponding path program 1 times [2019-10-15 01:41:08,361 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:08,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395357738] [2019-10-15 01:41:08,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:08,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:08,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:08,818 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 01:41:08,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395357738] [2019-10-15 01:41:08,821 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:08,821 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:08,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33690457] [2019-10-15 01:41:08,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:08,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:08,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:08,851 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:09,533 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:09,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:09,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:09,568 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:09,569 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:09,576 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 01:41:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2019-10-15 01:41:09,642 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2019-10-15 01:41:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:09,643 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2019-10-15 01:41:09,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2019-10-15 01:41:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:41:09,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:09,650 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-15 01:41:09,650 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash 656214890, now seen corresponding path program 1 times [2019-10-15 01:41:09,651 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:09,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956083148] [2019-10-15 01:41:09,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:09,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:09,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:09,809 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956083148] [2019-10-15 01:41:09,809 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:09,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:09,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584789918] [2019-10-15 01:41:09,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:09,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:09,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:09,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:09,813 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand 6 states. [2019-10-15 01:41:10,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:10,587 INFO L93 Difference]: Finished difference Result 531 states and 984 transitions. [2019-10-15 01:41:10,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:41:10,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-15 01:41:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:10,594 INFO L225 Difference]: With dead ends: 531 [2019-10-15 01:41:10,594 INFO L226 Difference]: Without dead ends: 361 [2019-10-15 01:41:10,619 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:41:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-10-15 01:41:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 355. [2019-10-15 01:41:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:41:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 632 transitions. [2019-10-15 01:41:10,670 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 632 transitions. Word has length 104 [2019-10-15 01:41:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:10,672 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 632 transitions. [2019-10-15 01:41:10,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 632 transitions. [2019-10-15 01:41:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:41:10,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:10,680 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-10-15 01:41:10,681 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1784859037, now seen corresponding path program 1 times [2019-10-15 01:41:10,682 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:10,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015970382] [2019-10-15 01:41:10,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:10,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:10,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:10,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015970382] [2019-10-15 01:41:10,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:10,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:10,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106178448] [2019-10-15 01:41:10,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:10,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:10,850 INFO L87 Difference]: Start difference. First operand 355 states and 632 transitions. Second operand 3 states. [2019-10-15 01:41:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:11,300 INFO L93 Difference]: Finished difference Result 961 states and 1741 transitions. [2019-10-15 01:41:11,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:11,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-10-15 01:41:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:11,307 INFO L225 Difference]: With dead ends: 961 [2019-10-15 01:41:11,308 INFO L226 Difference]: Without dead ends: 611 [2019-10-15 01:41:11,312 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 01:41:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2019-10-15 01:41:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 611. [2019-10-15 01:41:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2019-10-15 01:41:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1048 transitions. [2019-10-15 01:41:11,354 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1048 transitions. Word has length 105 [2019-10-15 01:41:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:11,355 INFO L462 AbstractCegarLoop]: Abstraction has 611 states and 1048 transitions. [2019-10-15 01:41:11,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1048 transitions. [2019-10-15 01:41:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 01:41:11,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:11,361 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, 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] [2019-10-15 01:41:11,361 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:11,362 INFO L82 PathProgramCache]: Analyzing trace with hash 479523536, now seen corresponding path program 1 times [2019-10-15 01:41:11,362 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:11,362 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107105835] [2019-10-15 01:41:11,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:11,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:11,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:11,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107105835] [2019-10-15 01:41:11,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859697889] [2019-10-15 01:41:11,526 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 01:41:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:11,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:11,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:11,774 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:11,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [573634614] [2019-10-15 01:41:11,910 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:11,911 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:11,919 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:11,936 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:11,936 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:12,309 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:14,673 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 88 for LOIs [2019-10-15 01:41:24,342 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2019-10-15 01:41:24,514 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 15072 conjuctions. This might take some time... [2019-10-15 01:41:25,397 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-15 01:41:25,528 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11960 conjuctions. This might take some time... [2019-10-15 01:41:26,129 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-15 01:41:26,281 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11960 conjuctions. This might take some time... [2019-10-15 01:41:26,927 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:41:26,944 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:41:27,203 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:41:27,489 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:41:27,824 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2019-10-15 01:41:28,082 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 75 [2019-10-15 01:41:28,376 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2019-10-15 01:41:28,632 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2019-10-15 01:41:28,907 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-10-15 01:41:29,718 WARN L191 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 91 [2019-10-15 01:41:30,256 WARN L191 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 86 [2019-10-15 01:41:30,542 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2019-10-15 01:41:35,156 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:41:35,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-15 01:41:35,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560276614] [2019-10-15 01:41:35,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:41:35,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:35,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:41:35,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:41:35,160 INFO L87 Difference]: Start difference. First operand 611 states and 1048 transitions. Second operand 13 states. [2019-10-15 01:41:35,482 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:41:35,854 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:41:36,227 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 98 [2019-10-15 01:41:36,651 WARN L191 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 96 [2019-10-15 01:41:37,021 WARN L191 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:41:37,397 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:41:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:39,763 INFO L93 Difference]: Finished difference Result 1404 states and 2389 transitions. [2019-10-15 01:41:39,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:41:39,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 141 [2019-10-15 01:41:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:39,771 INFO L225 Difference]: With dead ends: 1404 [2019-10-15 01:41:39,771 INFO L226 Difference]: Without dead ends: 798 [2019-10-15 01:41:39,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 300 SyntacticMatches, 112 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:41:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2019-10-15 01:41:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 790. [2019-10-15 01:41:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 790 states. [2019-10-15 01:41:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1246 transitions. [2019-10-15 01:41:39,823 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1246 transitions. Word has length 141 [2019-10-15 01:41:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:39,824 INFO L462 AbstractCegarLoop]: Abstraction has 790 states and 1246 transitions. [2019-10-15 01:41:39,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:41:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1246 transitions. [2019-10-15 01:41:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 01:41:39,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:39,829 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:40,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:40,034 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1622761115, now seen corresponding path program 1 times [2019-10-15 01:41:40,035 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:40,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853415531] [2019-10-15 01:41:40,035 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:40,035 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:40,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:41:40,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853415531] [2019-10-15 01:41:40,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827730155] [2019-10-15 01:41:40,195 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 01:41:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:40,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:40,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:40,412 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:40,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280478199] [2019-10-15 01:41:40,480 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:40,480 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:40,481 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:40,481 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:40,481 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:40,610 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:41,639 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 85 for LOIs [2019-10-15 01:41:43,151 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2019-10-15 01:41:43,229 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 33